Madjid Montazeri; Leyla Dadkhah
Volume 22, SEPEHR , July 2013, , Pages 89-91
Abstract
Dust has always been one of the most important environmental hazards and it leaves adverse environmental consequences. The present article seeks to identify and analyze dusty days’ trend in Bushehr station during the last 55 years.
In this regard, monthly and annual statistical data of dusty days ...
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Dust has always been one of the most important environmental hazards and it leaves adverse environmental consequences. The present article seeks to identify and analyze dusty days’ trend in Bushehr station during the last 55 years.
In this regard, monthly and annual statistical data of dusty days in Bushehr station between 1951 and 2005 was applied. First, normality test was performed using Ncss and homogeneity test was performed using Runs Test. After proving data abnormality, nonparametric test of Mann-Kendall was chosen.
Findings indicate that except for June, other months show an increasing trend of dusty days even in annual scale. Noteworthy, the increasing trend in cold months is more obvious than warm months of the year so that March and November with respectively 3.71 and 4.4 show an increasing trend in 99.9 percent significant level.
Bahman Kargar; Hamid Bahira'ii; Mohammad Ali Rajaee Rizi
Volume 21, Issue 83 , November 2012, , Pages 91-93
Abstract
The current situation in realms of economy, society, culture or in the area of assessing social influences may be considered inappropriate and thus different actions have been performed to improve the situation. Accordingly, different forms of development, like economic development, social development ...
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The current situation in realms of economy, society, culture or in the area of assessing social influences may be considered inappropriate and thus different actions have been performed to improve the situation. Accordingly, different forms of development, like economic development, social development and/or political development occur.
But, people generally only recognize economic development. Societies take 3 types of actions to reach economic development:
Policy making, designing plans and implementing projects
Policies have a general and software-like nature. They are usually holistic. All developmental policies, plans and projects are generally called developmental action.
Annually, multiple policies, tens and hundreds of plans and thousands of projects are designed and implemented with the aim of realizing development-i.e. improving the current situations which are considered inappropriate. Developmental actions seem to have a technological nature and up to 3 decades ago experts ignored the social nature of development and its diverse influences on people’s life.
It has been proven for about 3 decades that developmental actions do not simply have technical dimensions and apart from the negative influences they have on people’s lives, their success in reaching their goals depends on some social variables. Nowadays, we know that the success of developmental actions usually requires considering social preconditions.
Every year, many dames are constructed and people living in the dam reservoir area will be forced to leave the area. Many irrigation channels are built and their rural applicant complain about construction charges and the fact that they cannot efficiently use them. Governments plan and implement diverse policies to appropriately control fuel consumption, targeting subsidies, giving financial and credit facilities, transferring natural resources, building refineries and oil/gas facilities, developing tourism, constructing roads and performing projects like railroad, pipe lines and many other actions which all affect people’s lives.
Hossein Hataminejad; Mehrdad Karami; Fariad Parhiz
Volume 20, Issue 77 , May 2011, , Pages 91-97
Abstract
Growing urban population, unpreparedness of urban areas to respond to the needs of community and partial views and trends of planning have led to serious economic, social, environmental and physical problems in the cities. Hundreds of millions of poor people today have very few options for their lives ...
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Growing urban population, unpreparedness of urban areas to respond to the needs of community and partial views and trends of planning have led to serious economic, social, environmental and physical problems in the cities. Hundreds of millions of poor people today have very few options for their lives in unsafe, unsanitary towns lacking basic facilities. Based on this, City Development Strategy (CDS) was developed by the Coalition for Cities to resolve some of these issues.The urban development strategy is an effective approach to create collective decision-making processes in developing countries and to reduce the overall poverty level and ensure sustainable development. This paper uses descriptive-analytical method to examine first the attitudes of the Coalition for Cities and then the practical experiences of city development strategy (CDS) in the world. The purpose of this paper is to analyze the CDS experiences in the world in order to help urban planners to improve the quality of life and residence of citizens. In this research, the practical experiences of CDS in Phnom Penh, Shen Yang, Amman and Urada, Santo Andre have been analyzed.
Jamal Mohammadi; Hamid Reza Rakhshani Nasab
Volume 19, Issue 74 , August 2010, , Pages 91-95
Abstract
The paths of three urban amusement parks in different locations in Istanbul were evaluated by students of the University of Istanbul in three separate sites for examination of security, landscape quality, or both. The purpose of this study is to determine the level of personal safety in urban recreational ...
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The paths of three urban amusement parks in different locations in Istanbul were evaluated by students of the University of Istanbul in three separate sites for examination of security, landscape quality, or both. The purpose of this study is to determine the level of personal safety in urban recreational parks and indicates whether there is a sufficient assurance through useful studies of using such a judgment in recognizing the effect of the feeling of safety in the park's designed areas to see the relationship between the sense of safety and the appearance and visual charms of the urban parks? The results of the research show that there is a strong relationship between visible parts, aesthetics and observed security in the three studied parks. Other research findings show that there is a weak correlation between visible safety and beauty.
Hamid Reza Varesi; Maryam Askari
Volume 21, Issue 82 , September 2012, , Pages 92-98
Abstract
Recently, city services have faced many problems and issues due to rapid increase in urbanism and lack of a codified system of planning and management in different cities. Irregular and hasty population growth results in heterogeneous constructions without correct urban planning and distribution of facilities ...
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Recently, city services have faced many problems and issues due to rapid increase in urbanism and lack of a codified system of planning and management in different cities. Irregular and hasty population growth results in heterogeneous constructions without correct urban planning and distribution of facilities and services in a way that makes it impossible for everyone to take advantage of economic, environmental facilities. This results in the centralization of specific institutional-political and economic land use in specific urban areas. Residential areas are also an important part of urban land use and the largest area in most cities is allocated to them. They also face problems like shortage and lack of clear standards in buildings, disregard of quantitative and qualitative household indexes, shortage and costliness of urban lands, materials, establishment in inappropriate places and etc. Thus considering issues and problems facing urban household, an analysis and evaluation of the present house hold situation in different neighborhoods of Ilam was necessary for appropriate planning, qualitative and quantitative improvement of households and preventing irreparable damages.
In order to identify different insufficiencies in neighborhoods, it was necessary to collect information using questionnaire and analyze them using SPSS and Excel.
Results indicate that different urban neighborhoods have different qualitative and quantitative indexes, they have different level of access to urban facilities and services and their appearance is completely different. So that among 16 neighborhoods, suburban areas including 3 neighborhoods do not have access to the least household possibilities and standards. It is assumed that other neighborhoods have better situations and there is a significant relation between income level and the household quality.
Hossein Asakareh; Mohammad Savari
Volume 19, Issue 75 , November 2010, , Pages 92-96
Abstract
According to statistics thousands of people die or become disabled in road accidents every year. Several factors may play a role in the occurrence of accidents, among which are road geometric design, environmental conditions and human factors. Among the environmental factors that affect the safety and ...
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According to statistics thousands of people die or become disabled in road accidents every year. Several factors may play a role in the occurrence of accidents, among which are road geometric design, environmental conditions and human factors. Among the environmental factors that affect the safety and sustainability of transportation, we can mention the role of climatic phenomena such as precipitation, wind, temperature, fog, dust and humidity. The axis of Ahwaz-Susangerd, 55 km long, is among the main roads linking to Hamidieh, Susangerd, Hoveizeh and Bostan through Ahwaz. In this study, the analysis of road accidents has been conducted with climatic attitude and in order to investigate the relationship between spatial distribution of accidents and elements-climatic phenomena such as precipitation, fog and dust, temperature, humidity and wind. In order to investigate the role of climatic phenomena in the occurrence of accidents, the hourly meteorological data of Ahwaz, Abadan, Bostan and Hamidieh weather stations have been used and the meteorological situation of the moment of accident has been extracted through interpolation of these data. Also, police information of road accidents has been used. The road map of Southwest of Khuzestan with a scale of 250,000: 1 has been selected as the base map. Using these data for a three-year period (2005-2007), a map of dispersion of accidents in different atmospheric conditions is provided. Based on the results from the maps of accident risk, the highest probability of accident risk during rain falls is in 9, 16, 21, 22 and 25, fog and dust in 10, 29, 35 and 49, the maximum temperature in 20, 25, 35, 43 and 49, wind in 10, 21, 22 and 43, and humidity in 9, 35, 45 and 50 kilometers of the road.
Arman Gheisvandi
Volume 19, Issue 76 , February 2011, , Pages 95-96
Abstract
Today, we are facing with the ever-increasing advances in remote sensing and aerial photography and satellite imagery, with the increasing use of remote sensing and GIS in environmental planning, especially in various branches of natural sciences and earth sciences. In this paper, we have tried to examine ...
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Today, we are facing with the ever-increasing advances in remote sensing and aerial photography and satellite imagery, with the increasing use of remote sensing and GIS in environmental planning, especially in various branches of natural sciences and earth sciences. In this paper, we have tried to examine the role and application of satellite imagery in environmental studies. GIS can be considered a high-level mapping product. The term "GIS" has been used in recent years as synonymous with the rapidly emerging technology for the processing of spatial data. GIS can be defined as a powerful set of computer tools for collecting, storing, restoring, transmitting and displaying spatial data from the real world for specific purposes.
Iman Ghalandarian Golekhatmi
Volume 23, Issue 89 , May 2014, , Pages 102-105
Abstract
Different elements are involved in user’s transportation choice. Land use is one of these influential elements. The present article investigates the impact of different urban land use factors (like density, local access, street connections, composition of the land uses, pedestrian-center) on traveling ...
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Different elements are involved in user’s transportation choice. Land use is one of these influential elements. The present article investigates the impact of different urban land use factors (like density, local access, street connections, composition of the land uses, pedestrian-center) on traveling behaviors (like using personal car, transportation without car). This information is especially appropriate for evaluating transportation policies and their influences. Policies like intelligent growth, new urbanism and access management help in realizing plans of transportation planning.
Mohammad Khoshniyyat
Volume 22, SEPEHR , April 2013, , Pages 102-109
Abstract
Human beings have always sought to find ways for coping with their routine life issues and predict future plans which guarantee their future and enable them to exploit surrounding space in the best possible way. Therefore, they innovated and created new things to accomplish their goals and realize their ...
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Human beings have always sought to find ways for coping with their routine life issues and predict future plans which guarantee their future and enable them to exploit surrounding space in the best possible way. Therefore, they innovated and created new things to accomplish their goals and realize their fantasies.
We can refer to the invention of computer and subsequently Internet as some of the instances which have caused a wonderful change in the world.
Now, we face a situation in which different countries, even the small and unimportant ones, have passed traditional and old methods and reached towards planning large-scale economic goals with a special emphasis on information technology and e-tourism to attract customers and exploit its enormous benefits for the economic development of their countries.
Due to rich cultural, artistic, historical and climatic resources, our country possesses a huge potential in attracting tourists which with a purposeful planning and appropriate introduction of potentials in tourism, can provide the requirements for employment and economic flourishing.
The present article considers nature and concept of electronic tourism and focuses on different dimensions of this kind of tourism. Results indicate that regarding abundant potentials in tourism and numerous technical, technological and human force possibilities, Iran must use tourism development, especially electronic tourism, to reach economic and social sustainable development.
Seyyed Hossein Mousavi; Zahra Heydari Monfared; Shahab Shafie
Abstract
Extended Abstract
Introduction
Identifying the patterns and synoptic models that create instability and precipitation in the region is necessary. If the systems that come into the area, contain the appropriate thermodynamic structure, i.e. of high volatility, with appropriate heat and humidity, make ...
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Extended Abstract
Introduction
Identifying the patterns and synoptic models that create instability and precipitation in the region is necessary. If the systems that come into the area, contain the appropriate thermodynamic structure, i.e. of high volatility, with appropriate heat and humidity, make good rainfall in the region. Thunder storms along with subsidiary phenomena arising from them, such as hailstones, are one of the violent manifestations of nature. In the North West of the country due to geographical conditions in addition to synoptic systems (front cold low pressure systems), instability of local causes urinals (in this instability rising moist air causes rain too) and sometimes because of both the (synoptic system and local instability) heavy showers and hail occur. Thus, in the present research, in order to obtain hailstone risk management in north western part of the country and to reduce damages deriving from it, the evaluation of this destructive phenomenon has been taken into consideration using instability indices.
Materials and methods
The data used in this study included daily information related to hail of the country's North West region from 25 synoptic stations. Codes of hail (27, 90, 87, 93, 94, 96 and 99) of 100 Codes of Group VII (ww air now) were extracted from the data of the listed stations. In order to detect thermodynamic conditions of the occurrence of this phenomenon during a 18 year statistical period (1992-2009), instability indices, 230 cases of the occurrence of Skew T log P, and glacial levels of PWC, T.T, V.T, C.T, KI, SW, LI, SI hailstone atmospheric climatic diagrams of Tabriz and Kermanshah provinces’ stations to thorough covering of the region were extracted from the Wyoming University website of the United States of America and were studied.
Findings
Evaluating and comparing the instability indices of days of hail in the North West with the above table, the following conclusions emerged: the values of SI on all days of sampling except on 22 April 1994, 22 April and 29 May 2003, 27 January 2004, 19 May 2005 and 21 November 2009, about 9/73% of the days selected are larger than 4. LI values greater than zero on all days have been evaluated. It means the observed figures on the proposed figure of 100% are contrary to international indicators. SW values in all the days to the days of April 22, 1994, February 11, 2003, April 27, 2005 and November 21, 2009, about 6/82 are less than 150% of study days. Index values are less than 43 days T.T on December 18, 1993, February 11, 1997, January 16 and 6 March and 4 May 1998, 18 February 1998, 23 January and 27 April 2005, respectively. In other words, it can be noted that about 8/34% of observation days is contrary to the global indices. Days of less than 15, KI includes 30.4% of the studied days. it means on December 18, 1993, February 11 and March 8, 1997, January 16 and 6 March and 4 May 1998 and 23 January 2005, CT values of about 39% of studied days on December 18, 1993, April 22, 1994, February 11 and 3, 1997, January 16 and 6 March and 4 may 1998, 8 February 1999 and 29 may 2003 were lower. V.T index also includes amounts less than 25 days of December 18, 1993, February 11, 1997, January 16, 6 March 4, 1998, February 8, 1999, is April 4, 2002 and January 23, 2005. In other words, about 8/34% of studied days are incompatible with global indices figures.
Conclusion
The results obtained from all of the aforementioned indices were compared with the atmospheric instability standards and were evaluated. In this study, some contradictions between observatory and predicted values were discerned and finally, instability indices of the region were determined as follows:
SI ≤ 20.71, LI ≤ 16.63, SW≤ 19.99, KI ≤ 14.30, CT ≤ 11.50, V.T≤ 24.70 and T.T ≤ 41.80
Moreover, it was observed that atmospheric instability of the region has aggravated in recent years, so that SI and LI indices have approached zero in the past few years and other indices have each ascended one millimeter towards their maximum thresholds. Additionally, glacial level in the hailstone days under study fluctuates between 850 to 650 Hectopascal, i.e. between the altitude of 1393 and 3788 meters. This level increases in the hot months of the year.
Fakhraldin Shaikhi; Zabihallah Masoudinia; Mahdi Gholamalifard; Mohsen Mirzaii; Rasoul Mousavi Bidli
Abstract
Abstract[1]
Information on archeology and the distribution of ancient sites for the possibility of analyzing the past societies and the remaining remnants of them is of particular importance. But unfortunately, our information about ancient sites and their pattern of distribution is often accompanied ...
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Abstract[1]
Information on archeology and the distribution of ancient sites for the possibility of analyzing the past societies and the remaining remnants of them is of particular importance. But unfortunately, our information about ancient sites and their pattern of distribution is often accompanied by flaws and uncertainty.In the present study, statistical techniques and geographic information systems have been used to obtain the relationship between environmental variables (including: distance from springs, distance from permanent rivers, distance from aqueducts and wells, distance from bridle paths and distance from cemeteries) which have decisive and influential on the pattern of human population distribution in different ages.Among the statistical techniques, the weight-evidence functions are able to use the knowns and the unknowns of the user about the occurrence of a phenomenon (ancient locations and sites) and by processing hypotheses from the knowns and limiting the hypotheses cases where there is no accurate knowledge and finally the weight composition of the inputs, display the information defect in the final results.ROC statistics were used to assess the accuracy of modeling.To evaluate the accuracy of modeling, ROC statistics have been used and the results of the research indicate that this model has the ability to predict favorable areas of unknown ancient locations and sites in Boroujen and Lordegan in provinces of ChaharmahalvaBakhtiari province (ROC=0.89).This approach is an appropriate solution for decision making and management in the field of archaeological research and the results of this research can be used for the management and planning of surveys, and archaeological excavations, prioritizing the existing susceptible areas in terms of ancient importance and ultimately saving on time and economic costs.
[1] - به دلیل کیفیت نامناسب ترجمه (چکیده مبسوط انگلیسیِ دریافتی) نشریه، به ناچار اقدام به ترجمه مجدد متن مختصر چکیده فارسی و انتشار آن به جای چکیده مبسوط انگلیسی نموده است.
Kamal Omidvar; Reza Ebrahimi; Ahmad Mazidi; Teymur Alizadeh
Abstract
Abstract[1]
Increasing demand for energy against the reduction of comprehensive energy resources along with the consequences of global warming, make the importance of a quantitative review of changes in the need for cooling, heating of the country in the past and in the future decades essential. First, ...
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Abstract[1]
Increasing demand for energy against the reduction of comprehensive energy resources along with the consequences of global warming, make the importance of a quantitative review of changes in the need for cooling, heating of the country in the past and in the future decades essential. First, the overall atmospheric circulation data was extracted from the EH5OM database. These data were under the A1B scenario of the International Climate Change Board and were downscaled with regional climate model data of average daily temperature of 0.27 x 0.27 degree, which covers approximately 30 x30 kilometer dimensions of Iran in the time interval of (2015-2050). The average daily temperature data of the past period were extracted from the ISFZARI databases during the statistical period of (1970-1970) on cells measuring 15 x 15 km. throughout the country. The temperature threshold of 11 degrees was used to calculate the heating degree day and the threshold of 18.3 to calculate the cooling degree day. The monthly average of these parameters was obtained on a matrix of 12 × 2140 (future) and 7187 * 12 (past), in which the rows represent the time (month of the year) and the columns represent the locations of the cells. Then the monthly average map of both periods was drawn and interpreted. The results indicate that the cooling of the air in the coming decades compared to the previous period in January and December in most parts of the country except for the coastal areas and the hinterlands, and the warming of the air in most parts of the country in the warm months of the year (June, July, August) will have significant effects on the amount of energy used for heating and cooling.
[1] - به دلیل کیفیت نامناسب ترجمه (چکیده مبسوط انگلیسیِ دریافتی) نشریه، به ناچار اقدام به ترجمه مجدد متن مختصر چکیده فارسی و انتشار آن به جای چکیده مبسوط انگلیسی نموده است.
Mostafa Karampoor; Zahra ZareiCheghabaleki; Mansour Halimi; Mostafa Nouroozi Mirza
Abstract
Extended Abstract
Introduction
Global warming and climate change are terms for the observed century-scale rise in the average temperature of the Earth's climate system and its related effects. Multiple lines of scientific evidence show that the climate system is warming. Many ...
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Extended Abstract
Introduction
Global warming and climate change are terms for the observed century-scale rise in the average temperature of the Earth's climate system and its related effects. Multiple lines of scientific evidence show that the climate system is warming. Many of the observed changes since the 1950s are unprecedented over tens to thousands of years. In 2014, the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report concluded that "It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century. The largest human influence has been emission of greenhouse gases such as carbon dioxide, methane and nitrous oxide. Human activities have led to carbon dioxide concentrations above levels not seen in hundreds of thousands of years. Climate model projections summarized in the report indicated that during the 21st century, the global surface temperature is likely to rise a further 0.3 to 1.7 °C (0.5 to 3.1 °F) for the lowest emissions scenario and 2.6 to 4.8 °C (4.7 to 8.6 °F) in the highest emissions scenario. These findings have been recognized by the national science academies of the major industrialized nations and are not disputed by any scientific body of national or international standing.
Climate change is one of the main challenges that human being has faced since the 19th century. Anthropogenic changes in climate which leads to global warming and various side effects occurred and affected human life. The global warming leads to some significant changes in environmental, ecological and economic conditions. The spatiotemporal dynamics of vegetation colony and various biodiversity dynamics are also related to global warming. One of the main signal of global warming is the significant trends and changes in some climatic factors such as monthly, daily and annual temperature and rainfall. The spatial dynamics of climatic factors such as temperature and rainfall could also be related to global warming. In this study, we aimed to investigate the rainfall variations in different altitude ranges in Iran.
Precipitation varies from year to year and over decades, and changes in amount, intensity, frequency, and type (e.g. snow vs. rain) affect the environment and society. Steady moderate rains soak into the soil and benefit plants, while the same amounts of rainfall in a short period of time may cause local flooding and runoff, leaving soils much drier at the end of the day. Snow may remain on the ground for some months before it melts and runs off. Even with identical amounts, the climate can be very different if the frequency and intensity of precipitation differ, as illustrated, and in general the climate is changing from being more like that at Station (Stn) to that at Stn A. These examples highlight the fact that the characteristics of precipitation are just as vital as the amount, in terms of the effects on the soil moisture and stream flow. Hydrological extreme events are typically defined as floods and droughts. Floods are associated with extremes in rainfall (from tropical storms, thunderstorms, orographic rainfall, widespread extra-tropical cyclones, etc.), while droughts are associated with a lack of precipitation and often extremely high temperatures that contribute to drying. Floods are often fairly local and develop on short time scales, while droughts are extensive and develop over months or years. Both can be mitigated; floods by good drainage systems and drought by irrigation, for instance. Nonetheless, daily newspaper headlines of floods and droughts reflect the critical importance of the water cycle, in particular precipitation, in human affairs. World flood damage estimates are in the billions of U.S. dollars annually, with 1000s of lives lost; while drought costs are of similar magnitude and often lead to devastating wildfires and heat waves. The loss of life and property from extreme hydrological events has therefore caused society to focus on the causes and predictability of these events. Tropical cyclones typically have the highest property damage loss of any extreme event, and are therefore of great interest to state and local disaster preparedness organizations, as well as to the insurance industry.
Materials & Methods
The data of annual rainfall of 22 synoptic stations has been investigated during 1992 to 2012. First, we sorted these stations based on the altitude ranges into 4 classes, namely: Less than 500 meter, 500 to 1000 meters, 1000 to 1500 and more than 1500 meter above sea level. We used Man-Kendal’s nonparametric trend analysis test to detect any significant trend at 95 and 99 confidence levels (P value= 0.05 and 0.01, respectively).
Discussion and Results
The results indicated that the highest rainfall decrease was observed at the elevations below 500 meters, especially in March and in the annual scale. The highest precipitation at the elevations of 500 to 1000 meters was observed in the months of March, May and October, with the highest drop in rainfall at 1000 to 1500 meters in February and June. On the annual scale, all stations showed a negative trend in rainfall. Many stations, including Maragheh, Maku, Mahabad, Urmia and Birjand, showed a significant decrease in annual scale. The results of this study showed that elevations above 1000 meters have a higher relative stability in rainfall, while rainfall at stations below 500 meter elevations have a more time variability.
Conclusion
Based on the findings of this research, it can be concluded that the monthly and annual rainfall of stations located at elevations below 1000 meters have had greater and more significant changes than the rest of the stations. Thus, it can be said that the climate change has been more noticeable in the stations of this class.
Nafiseh Rezapour Andabili; Marzieh Alikhah Asl
Abstract
Abstract[1]
Evaluation of ecological potential is a process which attempts to establish an appropriate and balanced development between human and nature through adjusting their relationship. Aqdagh protected area with a total area of 93889 hectares is located south of Ardebil province (south of Khalkhal ...
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Abstract[1]
Evaluation of ecological potential is a process which attempts to establish an appropriate and balanced development between human and nature through adjusting their relationship. Aqdagh protected area with a total area of 93889 hectares is located south of Ardebil province (south of Khalkhal city) and north of Zanjan province. The purpose of this study is to evaluate the ecological potential of forestry use in the protected area of Aqdagh and to assess the current adaptation of forestry use to the ecological potential of the area for the above mentioned uses. The process of ecological potential assessment in this study consists of three main parts that after ecological resource identification, analyzing and aggregating the data, ecological potential has been determined in the study area. The information layers used in this study are: soil, climate, vegetation, landform, hydrology and land use. Studies show that the forestry potential has been with a total area of 11293.5 hectares and the results indicate that forestry classes 1, 2 and 7 are absent due to the biophysical status and especially the altitudes and climate of the region, so that only forestry classes 3, 4, 5 and 6 are present in the study basin. Use patterns of the identified forest classes are consistent with the assessment of their potentials in the region and they also have forest uses in the current situation,however, the forest class 6 currently has pasture use and of the four forestry classes in the region,the share of the forest class 6 is the most. Findings indicate that this area has many limitations for the growth of commercial forest.
[1] - به دلیل کیفیت نامناسب متن چکیده مبسوط انگلیسیِ ارائه شده توسط نویسنده مسئول مقاله، نشریه به ناچار اقدام به ترجمه مجدد متن چکیده فارسی و انتشار آن به جای چکیده مبسوط انگلیسی نموده است.
parviz panjehkoobi; Abolfazl Masoudian; Abdolazim Qangherme
Abstract
Extended Abstract Introduction Runoff is considered to be an effective variable in the formation and intensity of floods, and water balance. It is also considered to be a very important parameter in water resources management. Surface runoff is formed due to a combination of different parameters, such ...
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Extended Abstract Introduction Runoff is considered to be an effective variable in the formation and intensity of floods, and water balance. It is also considered to be a very important parameter in water resources management. Surface runoff is formed due to a combination of different parameters, such as severe precipitation, a sloping ground, and saturated soils. It is especially important to predict and determine the amount of runoff produced and transferred to the basin outlet. Generally, different parts of large basins may experience a higher or lower than average precipitation, and thus different spatial distribution of precipitation. Empirical formulas may sometimes give us an inaccurate estimation of the surface runoff volume. Radar and rain gauges are the most common tool used for collecting rainfall data. Together, they can be useful for estimation of rainfall volume and its distribution in a wide area. Integrating high resolution radar based rainfall estimation with hydrological models makes a highly efficient tool for flood prediction. Materials and Data Baghu Basin is considered to be one of Gorgan Gulf sub basins. It covers an area of 24.4 square kilometers. Its perimeter is 23.2 kilometers. The length of its main river is 10 kilometers. The maximum altitude of the main river is 2080 m and its minimum altitude is 80 m. The river channel has an average slope of 20%. Data used in this research includes: 1-data received from east Caspian radar; 2- precipitation and daily evaporation data received from different weather stations around the basin, including Bandar Gaz, Bandar-Torkman, Hashem-Abad and Gorgan stations; 3- discharge value in previous floods of Baghu basin. Geographic coordinates of the basin were obtained using GIS. Geographical coordinates of the basin perimeter were also extracted by radar and the basin area was defined for the radar. Then using the radar software, total amount of precipitation and runoff were measured in the basin. These were used in (1) to calculate runoff coefficient, as a percentage of rainfall: (1) Where C is runoff coefficient, P is precipitation elevation and R is direct runoff. Discussion and Results It is important to consider the effect of climatic and meteorological factors on runoff formation in basins. Severity of precipitation is the first factor. Radar based rainfall estimates indicated that increased rainfall intensity results in increased hourly runoff in the basin. The same phenomenon has been observed in some of previous floods in Baghu basin. In these cases, a sudden increase in precipitation resulted in a severe runoff increase. These floods exhibited long sharp-crested hydrographs. Spatial/temporal distribution of rainfall intensity was the second factor with a significant effect on the amount of runoff produced. Thus, the effect of rainfall distribution was also analyzed. Results indicate that rainfall distribution has affected the amount of runoff produced in different parts of the basin in different ways. Rainfall continuity was the third climatic factor with a significant role in the production of increased runoff. This factor was investigated in winter (cold seasons) floods. Apart from the intensity and volume of precipitation in these floods, precipitation continuity was the most influential factor in the production of a large amount of runoff. This shows the effect of rainfall continuity on runoff increase. Temporal distribution of rainfalls was the fourth factor influencing runoff production, and thus soil moisture. In winter, soil moisture is usually high and there is little evaporation. So soil maintains its moisture and remains wet for a longer time. In this way, a moderate and low amount of rainfall over a short period of time results in soil saturation, and runoff increase. This was investigated in Baghu basin precipitations. According to the findings of this study, increased soil moisture has resulted in runoff increase. Several climatic factors contribute to increased runoff coefficient. In high intensity floods which occur due to large volume of precipitation over a longer period of time, a huge amount of runoff would form. And if as a result of successive precipitation these factors combine with soil moisture, runoff coefficient would be even larger. In cold seasons, three factors - rainfall continuity, soil moisture and poor vegetation- results in increased runoff. However, dry soil and vegetation during warm seasons reduce the effect of intense precipitation on increasing runoff volume. Conclusion Based on the findings of the present study, it is not possible to consider a single constant runoff coefficient for the total area of a basin. Thus, it is better to determine a range of runoff coefficients for each basin. It should also be noted that each flood has its own runoff coefficient, which depends on precipitation severity, temporal/spatial distribution, rainfall duration, intensity variations during precipitation, time intervals between each rainfall occurrence and season rainfall coefficient. Respective severity or weakness of different factors, combination of various factors affecting runoff, and the amount of runoff in similar precipitation may also vary. The present study indicated that due to severe and sudden rainfalls, warm season floods had long sharp-crested hydrographs. In winter, rainfalls were continuous, but with lower intensity. Thus, their hydrograph was wider than warm season floods. In small areas with less than an hour concentration time, the effect of spatial/temporal dispersion of rainfall on the amount of runoff is important. In Baghu basin, 8 to 25 percent variation was observed in runoff coefficient of eight different floods.
Reza Lahmian
Abstract
Extended Abstract
Introduction
Statistics show that more than half of the world's population (54% in 2014) live in urban areas, although there are many differences between countries in terms of urbanization levels. For the first time in history, the urban population exceeded the rural population of ...
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Extended Abstract
Introduction
Statistics show that more than half of the world's population (54% in 2014) live in urban areas, although there are many differences between countries in terms of urbanization levels. For the first time in history, the urban population exceeded the rural population of the world in 2007. One of the most important problems of urban and environmental development is the shortage or lack of natural-regional parks in the center of the cities and in suburbs. Natural and regional parks have social, economic and ecological impacts in terms of the coherent structure which, is considered as a significant criterion for the betterment of the quality of living space and development of the community, with lots of benefits such as obtaining a suitable environment to develop the social coherence, maintain comfort and treat psychological and mental illnesses.Identifying the suitable locations for the natural-regional parks is one of the cases that should be taken into consideration regarding any type of development, including comprehensive plans, civil plans or regional plans. The purpose of this paper is to achieve the spatial organization of Mazandaran province in order to construct and allocate natural and regional parks in the regions of this province using the new scientific methods of spatial analysis in the GIS environment and applying multi-criteria decision-making techniques.
Research Method
The process of this study is descriptive and analytical. Accordingly, the necessary data and criteria, including maps and information layers and satellite imagery were analyzed using ARC GIS 10 and ENVI 5.1 software. In order to weigh,in addition to taking the experts point to the criteria into account, the Marinoni extension in Arc GIS software was used with regard to the hierarchical decision-making process. The main criteria used in this study are natural vegetation, transportation network, welfare and service centers, cultural-educational centers, commercial-residential areas, population centers, industrial areas. As it was mentioned, the information layers were provided for each of the influential factors, and a weight was assigned to each of the layers, and then, appropriate weights were assigned to each of the information layers based on their significance using hierarchical analyzing model to provide the spatial modeling, and the information layers were integrated, and the optimal regions were identified using the provided model.
Results and Discussion
Identifying and selecting the factors influencing the location, are among the significant stages of the study. The more compatible are the identified factors with the land reality, the more satisfactory will be the outcomes of the location. Accordingly, in this study, weights have been assigned to each one of the weights based on the opinions of the experts, using the hierarchical model, and the criterion of the transportation network with relative normalized weight (0.311) has had the most importance among the main criteria.Natural vegetation (with a normalized score of 0.277), population centers (with a normalized score of 0.271), and travelling facilities and services (with a normalized score of 0.120) have been placed in the subsequent ranks, respectively. Accordingly, in this research, with regard to the opinions of the experts, four main criteria of industrial, population centers, commercial-residential, cultural-educational, welfare and services, transportation network and natural vegetation, each one of which includes sub-criteria as well,were taken into consideration .A combination of the AHP process and Fuzzy set was used for analyzing the spatial data, in order to evaluate the selected factors and the Geographic Information System (GIS) as well. As it is seen, areas with a very good desirability in Kalastan have accounted for 6.6%, and areas with the lowest potential for the construction of natural-regional parks in Kalastan constitute 5.5%. Similarly, areas with medium potential and regions with relatively appropriate potential in Kalastan of Mazandaran show an average of 12.4% and 10.1%, respectively. Estimates show that about 129817 hectares of the area of the province are susceptible to creating regional parks, i.e. the area No. 1, which will be a significant amount for the decision-makers and planners in the urban and regional areas in pursuit of achieving sustainable development and protecting the natural environment of this province. In the next regions, the priority of the selection will be with the experts and decision-makers of this field.
Conclusion
The purpose of this research was to identify the areas susceptible to the creation of regional parks in the province of Mazandaran, in order to provide the sustainable financial resources for the management of the province while, protecting the natural resources of the province.
Alireza Soleimani; Ahmad Aftab; Ali Majnoony Tootakhaneh
Abstract
Extended Abstract Introduction Many of the problems that occur in the national security area should be sought at the border. Because undoubtedly, there is no element more important than the element of security and providing peace and calm in the society, for the progress, development and unilateral evolution, ...
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Extended Abstract Introduction Many of the problems that occur in the national security area should be sought at the border. Because undoubtedly, there is no element more important than the element of security and providing peace and calm in the society, for the progress, development and unilateral evolution, as well as the flourishing of talents, and social development. Creativity and valuable activity are not possible without security. The negative effects of border areas’ insecurity in the villages are more than cities. Because, rural areas are more vulnerable due to the developmental gap between villages and cities. Due to the vulnerability of the border villages, it is necessary to ensure the security of the villages through passive defense measures. West Azerbaijan Province with 980 km of common land border with Iraq, Turkey and the Republic of Azerbaijan and possessing ethnic cultural diversities has not been an exception to this rule. The conditions of the eight years of the imposed war, the crises of the neighboring countries of Iraq, Azerbaijan and ethnic conflicts in Turkey have caused insecurity in the geographical boundaries of the West Azerbaijani province. In this regard, the present research investigates the spatial structure and assessment of the vulnerability of rural settlements in the border regions of Iran and Turkey with an emphasis on passive defense approach. Materials & Methods The study area includes parts of West Azerbaijan province which is bordered by Turkey and includes the cities of Maku, Chaldoran, Khoy, Salmas and Urmia, and 1259 villages with a population of 568843. The main method of this research is descriptive-analytical. In order to carry out the spatial analysis of the rural settlements in the border regions of Iran and Turkey with regard to the passive defense approach, the eight major criteria (water resources, natural hazards, landforms, security considerations, climate, demographic considerations, access to facilities, land quality) were selected with 17 sub-criteria based on internal and external sources investigation. Then, using the network analysis process, the amount of importance coefficients of the criteria have been determined. In the next stage, the information layers were produced by the GIS in proportion to the indicators, and were integrated with regard to the capabilities of the GIS, and the extent of the vulnerability of settlements was extracted through the overlapping of the information layers. Results & Discussion Based on the results, security considerations with a score of 0.349 have the highest effect and significance. Meanwhile, the index of the distance from the border has the highest role with the rate of 0.1021. Demographic considerations with a score of 0.232, and environmental hazards with a score of 0.150 stand next with respect to the importance. In the cluster of demographic considerations, population density with a score of 0.0231, and in the cluster of environmental hazards, the distance from the flood-prone areas with a score of 0.0078 have had the highest effect. Among the main criteria examined, the quality of land and water resources are the least important with the importance rate of 0.019 and 0.026, respectively. Based on the results obtained, 17.9% of the study area was found to be a highly vulnerable zone. 123 villages with 8.3% of the population of the study area are located in this zone. The zone with the high vulnerability covers 17.5% of the area. 243 villages with 18% of the population are located in this zone. Conclusion The overall results of this research showed that by adopting a passive defense approach, the natural and human threats of border rural areas could be reduced. In this regard, in this research, in order to analyze the spatial structure of rural settlements in the border regions of Iran and Turkey with a passive defense approach, eight major criteria were identified. Security considerations with a score of 0.349 have the highest significance and impact on analyzing the rural settlements of the border areas of Iran and Turkey in terms of passive defense. Meanwhile, the index of the distance from the border with the rate of 0.1021 has the highest role with respect to the passive defense approach. In the next stage, demographic considerations with a score of 0.232 and environmental hazards with a score of 0.150 stand in terms of importance. Given these findings, the following solutions are proposed: • Identifying and eliminating the damages caused by the proximity of villages to the border point and the observation of the transboundary threats. • Creating job diversification among the border villages to reduce rural dependency on land. • Promoting the role and functions of border cities, including mid-range cities, in comprehensive rural development. • Encouraging people to stay in villages through investing in rural infrastructure. • Enhancement of the presence of military and law enforcement forces at the border level.
Marziyeh Deiravi pour; Hossein mohammadasgari; saeid Farhadi; Iman Najafi
Abstract
Extended Abstract Introduction One of the important features of desert areas (arid and semi-arid) is dust phenomena that occurs in most days of the year. Dust phenomena occur especially in tropical areas. In some parts of the world, including Africa, Australia and the Middle East, the annual sediment ...
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Extended Abstract Introduction One of the important features of desert areas (arid and semi-arid) is dust phenomena that occurs in most days of the year. Dust phenomena occur especially in tropical areas. In some parts of the world, including Africa, Australia and the Middle East, the annual sediment volume carried by the flow of the wind is greater than the sediment volume carried by the rivers. Today, the dust phenomena are among the most important environmental hazards which have put human and environmental health at serious risk. Based on the country’s comprehensive water plan, the size of the real deserts of Iran has increased to 4.7 million hectares or 35.5 percent of the country’s land area. Materials & Methods The study area was the southwest of Iran including Khuzestan and the Persian Gulf regions. In recent years, these regions have strongly been affected by the dust with internal source and especially with external sources such as dust sources in Iraq, Syria, and Saudi Arabia. In this research, we employed the library method and also determined the days of the dust storm using the weather data of the province. We used satellite data, MODIS sensor data and several algorithms based on the image processing to detect dust. In order to evaluate the different methods of dust detection, it is necessary to compare the results of the algorithms with another independent source. This source can be a natural color images, aerosol sensor products, MODIS dust indicators or other sensors products. In this research, we first introduced the HDF file of MOD021k MODIS images into the ENVI5.2 software to visualize the dust. After preprocessing the satellite images, we employed different methods such as creating False Color images, BTD and NDDI algorithms, and the neural network method to detect dust on satellite imagery. In this regard, we stored the required bands for the NDDI and BTD algorithms as a single band in the ENVI software, and entered it into MATLAB software to apply the detection algorithms. Due to the importance of remote sensing and satellite images and also the efficiency of the artificial neural networks method we decided to classify the images of the MODIS sensor by using the methods of the Artificial Neural Network and dust detection indexes. In general, the bands 20, 23, 31 and 32 of MODIS sensor and the infrared thermal bands were used more to detect dust storms. The Brightness Temperature Difference between these bands can detect dust storms from other phenomena. In this study, a Feed Forward Neural Network (FFNN) was used to detect dust storm in Khuzestan and the north of the Persian Gulf, using 20 data sets for the day and 11 data sets for the night. To categorize different pixels in the neural network based on BTD values, BTD of the bands 20-31, BTD of the bands 23-31, BTD of the bands 31-32 and bands 1, 3 and 4 were used. MODIS bands 1, 3 and 4 were used to create realistic color images to for the better detection of the Earth’s surface phenomena. These three bands were used only for MODIS’s daily images. Discussion The results show that the emissivity of sand in band 31 (0.96) is slightly lower than the band 32 (0.98), while the soil emissivity for these two bands was (0.97) and water emissivity (0.99). Also, the emissivity value of band 31 for the cloud was (0.98) and for band 32 was (0.95). There was a difference between the emissivity value of bands 23 and 31 for soil, sand, and water, which can be used to distinguish dust from other surfaces. The brightness temperature of dust storm (K298/4) and cloud (K276) in the band 23 (4.6 µm) was higher than the brightness temperature of dust storm (K287) and cloud (K271) in the band 31 (11.02 micrometers), while the brightness temperature of water (K285), ground (K310) and vegetation (K295) in the band 23 was lower than that in band 31 for the same items (Water (286K), ground (310K) and vegetation (296K). For these reasons, the difference in brightness temperature between bands 23 and 31 is useful for detecting dust from the ground, vegetation, cloud and water. In the artificial neural network, the correlation coefficient of the training, evaluation, test and total data was equal to R = 0.996, R = 0.99505, R = 0.99559 and R = 0.9958, respectively. These results show the good capability of the neural network in detecting dust. The data was divided into two classes of dust (0.9) and no dust (0.1). In fact, various inputs entered the network and were divided into two classes of dust and no dust. The results showed that the error started from a large amount and gradually decreased. Epoch is referred to as every step of the data correction. In other words, when an input passes through the network and generates an overall error, the weight factors are corrected with the help of that error, a process which is called the number of repetitions or the Epoch. Thus, as itis shown in the figure, the training ends after 151 repetitions. Given the results of the neural network output images, it is observed that dust is well distinguished in both the aquatic and terrestrial ecosystems and a better differentiation will be done with higher dust concentration. The ACC parameter indicates that the neural network method has had a good accuracy and performance. Results show that neural network is a more appropriate method than the BTD index in dust detection, and the neural network does not need to determine the threshold for examining each image. Conclusions The results of the NDDI index show that this parameter alone, is not able to distinguish dust pixels existing in the atmosphere from the pixels of sand and other than dust, and has poor accuracy in images with cloud or water. It seems that this low efficiency is related to the features of the earth’s surface such as land use, land cover, topographical differences, as well as chemical properties of dust minerals in the region. According to the results of this study, the results of applying the BTD index have suitable performance for the detection of dust. In the present research, the artificial neural network shows a fairly good accuracy and performance for the daytime images with an accuracy of 60%.
Habib Sahami; Sodabeh Papi; Nahid Khosravi
Abstract
Extended abstract
Introduction
Urban old fabrics are supposed to be one of the most vulnerable parts, which are affected in natural disasters mostly earthquakes. The buildings in such areas have no sufficient resistance because of long age and life span and in case of earthquake they are collapsed ...
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Extended abstract
Introduction
Urban old fabrics are supposed to be one of the most vulnerable parts, which are affected in natural disasters mostly earthquakes. The buildings in such areas have no sufficient resistance because of long age and life span and in case of earthquake they are collapsed and may follow the losses of life and property. The main purpose of this article is to analyze and investigate the vulnerability of old fabrics in the downtown Boroujerd city to countermeasure the earthquake and to manage the crisis after the occurrence. The nature of this research is theoretical and practical and the research method is descriptive-analytial. The required data have been collected from library and through field work. In this study, AHP method is used to analyze the area under investigation. The extracted indices are analyzed with the help of GIS and Arcmap. The results indicate high and intensive vulnerability of buildings, if an earthquake occurs. The majority of buildings are suffering from low quality materials, high population density and the establishment of organic tissue and narrow alleys, which results in the rise of destruction and therefore, causes heavy losses of life and property. The readiness to counter the crisis can mitigate the earthquake effects and by knowing the special dimensions of vulnerable buildings , population and also road networks , can speed up the process, and by using time, reduce the casualties which is possible only when parameters are available for making geospatial data basis
Materials & Methods
The research method was applied in terms of the aim, and descriptive-exploratory in terms of conduct. The pivotal principles of this investigation is based on vulnerable points in order to countermeasure the earthquake hazards. The collection of data is accomplished through library noting and field survey. In this study, the evaluation criteria and their weights were determined with acceptable accuracy by reviewing the literature, experts and paired in the form of AHP. The AHP method is used in this study to determine the vulnerability of old fabrics of the central Boroujerd city. This consists of six parameters and indices which include population density, passages width, building material ages, quality and the number and finally the number of floors. Weighing such parameters is carried out with the help of Expert Choice 2000 software and the weights are logged in the GIS software and in an Arcmap environment. The required analyses are observed on them. The area of this investigation is the old fabrics in downtown Boroojerd. The focus on this area is mainly due to old ages and the presence of significant historical places. The vulnerability factors are numerous, which are either natural, physical, social, economical, fundamental, rules and regulations , etc., but the most important boosting factors of the cities risk probabilities and their vulnerability enhancement can be summarized as Placement and locating of the city on various faults, Population concentration , failure to comply with retrofit rules and regulations, the lack of people’s knowledge of local citizen in facing emergency conditions and unexpected crises.
Results & Discussion
The results of the research show that in order to find the most suitable pattern of intervention to countermeasure the vulnerability of old fabrics in the city downtown is to reduce the time laps after every local crisis like an earthquake, to reduce the effective factors by creating a spatial data basis for vulnerable buildings, congested population in buildings and a proper knowledge about the communication networks in the old fabrics to minimize the Consequences. Weighing of these parameter, are carried out with the help of Expert Choice 2000 software and the weights are logged in the GIS software and in an Arcmapenvironment. The required analyses are plotted and observed on them.
Conclusion
It is concluded that, in the southern, western and central parts of old fabrics in Boroojerd city, the relief operations and crisis management efforts should be extended and the precautionary measures and preparedness must be augmented. Several suggestions have been proposed in order to minimize the casualties and damages in case of any probable threats and crisis, which include the renovation and reconstruction of structures with high ages and the improvement along with strengthening the old fabrics and their reinforcement. It has also been concluded that the majority of buildings are suffering from low quality materials, high population density and the establishment of organic tissues and narrow alleys, which results in the rise of destruction and therefore, causes heavy losses of life and property.
Seyed Hojjat Mousavi
Abstract
Introduction About one quarter of world’s deserts are covered with quick sands, whereby, sand fields are the most common landforms. The movements of the sand fields are considered as a threat to the roads, natural resources, urban areas, agriculture and infrastructure.Factors such aspoverty of ...
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Introduction About one quarter of world’s deserts are covered with quick sands, whereby, sand fields are the most common landforms. The movements of the sand fields are considered as a threat to the roads, natural resources, urban areas, agriculture and infrastructure.Factors such aspoverty of vegetation, increasing of drought due to global warming have led to the dynamic of sand fields with different speeds in manydirections that threat the transportation, health, economic and human activities. Thus, the spatial-temporal monitoring of sand fields dynamic behavior and identifying their directions of development are of great importancein the management of dry regions and conservation of natural resources. Therefore, the aim of this research is the Multi-temporal monitoring of sand field dynamic behavior in the west of Damghanplaya from 1972 to 2016, in the form of three 15-year period through data and remote sensing methods. Materials and Methods Damghanplaya Basin with an area of 18070.918 km2issituated between Toroud-ChahShirin Horst and the Alborz Mountains with an elevation of 2319 and 3884 meters respectively. Its general slope is towards the center of Damghan desert with an elevation of 1028m. Damghan playa is a tectonic-sedimentary hole, which is presently influenced by different geomorphic and climatic morphogenetic processes. Because of the vegetation and precipitation shortage,the wind morphogenetic systems dominate other processes. Thus, several types of wind erosion landforms can be observed in this region. The study area is the western erg of Damghanplaya with an area of 71.155 Km2 which is situated in Damghan Basin in the north of Iran’s great central desert. The region is located between latitudes 35° 51´ to 35° 58´ N and longitudes 54° 13´ to 54° 25´ E. This is an applied research and its methodology is a combination of remote sensing analyses. In this regard, topographic maps with a scale of 1: 25,000, geological maps with a scale of 1: 100,000 and Google Earth’s satellite images were used first to determine the position of the study area. Then, spatial database was completed through receiving Landsat satellite images during the period 1972 to 2016. Sinceseveral series of remote sensing satellite images belonging to multiple time periods are needed for monitoring the dynamic behavior of the sand field, four series of Landsat satellite images, MSS, TM , ETM+ and OLI sensors related to three 15 year periods of 1972,1987, 2002 and 2016 respectively, were used in this research. The aforementioned images were obtained from the Landsat satellite archive on the American geological organization website (http://earthexplorer.usgs.gov/). Then,color combinations, IHS transformation, and supervised classification of Maximum Likelihood methods were used to enhance the spatial area of the sand field, and the method of images difference and the calculation of the changing classes level were used to examine the type and trend of the changes.. Findings and Results The results show that the maximum and minimum area of the sand filed are observed in 2002 and 2016 with an area of 92.2641 and 49.2803 km2 respectively. The results of change detection show that there are three types of changes including increasing, decreasing, and no-changes. As it can be observed,the maximum area of the classes of change belongs to the no change class that the periods of 1972 to 1987 and 2002 to 2016 with the amounts of 58.3506 and 48.2841 km2 respectively,have the highest and lowest areas, while, the minimum area of the classes of change belongs to the class of incremental changes that the periods of 1987 to 2002 and 2002 to 2016 have the highest and lowest areas with the amounts of 38.2833 and 1.0359 km2 respectively. The maximum and minimum areas of decreasing class of changes belong to the periods of 2002 to 2016 and 1987 to 2002 with the amounts of 43.9829 and 14.2693 km2 respectively. In this regard, the no-change and increasing change classes with the standard deviation of 5.0445 and 19.4699 respectively, have the minimum and maximum range of changes during the entire period of 44 years. The results obtained fromstudying thetemporal trend of changes indicate the existence of a decreasing trend in the no-change and increasing change classes, and also the existence of an increasing trend in the class of decreasing changes.Descending trend of no-change class is uniform and continuous. In contrast, the trend ofincreasing and decreasing classes of changehas a periodic jump in the second time period (1987-2002), but their overall trend is almost uniform. Discussion and Conclusion Western erg of Damghanplaya has decreased by approximately 6.7225 km2 in 1987 compared to 1972. Most of this reduction has occurred in the southwestern and eastern parts of the sand field. The southwestern contraction of the erg is in accordance with the pediment and the sand harvesting area, the causes ofwhich are the sand transfer by local winds blowing from the southwest to the northeast, as well as the formation of the desert pavementfacies. In contrast, the eastern contraction of the erg is due to the increase in moisture content from the Haj Aligholiplaya and the increase in humidity caused by agricultural lands adjacent to the erg. In the second period, the trend was completely reversed and the sand field was expanded in 2002 by approximately 17.3659 and 24.0885 km2in 2002 compared to the years 1972 and 1987 respectively. This period is considered to be the most risky periods in terms of environmental hazards. In this period, major spatial expansion of the erg has taken place to the east and especially to the northeast. This expansion can be due to the increased drought severity and the continuation of dry periods and the release ofthe agricultural lands in some cases. In the third period, the situation has improved and the dynamic of sand has reduced, so that the extent of sand field has decreased in 2016 by 25.6178, 18.8952 and 42.9837 km2compared to the years 1972, 1987 and 2002 respectively, which represents the negative balance in the erg. In other words, the amount of the sand entering the erg is far less than that of the sand going out. In terms of location, the contraction of this period on the margins of the ergextends continuously and almost uniformly, but the largest contraction isobserved in the eastern, northeastern and southwestern parts. This decrease is due to the implementation of desert greening plans in the form of quick sands stabilization projects by planting Haloxylon. This indicates the positive and successfulfunction and role of desert greening projects. Also, due to the favorable natural and climatic conditions, the species of Haloxylon has been able to regenerate naturally in the area under cultivation. This has had a positive impact on the stabilization of quick sands and the reduction of erg changes.
Ali Dastranj; Maryam Jafari Aghdam
Abstract
Extended Abstract Introduction After United States of America, China and Turkey,Iran has the highest karst percentage, and karst formations cover more than 11%of our country. The volume of water stored in these areas can supply the water demand of many cities and villages. Characteristics of karst aquifers’feeding ...
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Extended Abstract Introduction After United States of America, China and Turkey,Iran has the highest karst percentage, and karst formations cover more than 11%of our country. The volume of water stored in these areas can supply the water demand of many cities and villages. Characteristics of karst aquifers’feeding area determine the type of feed, flow andvulnerability of the aquifer tocontamination.Therefore, identification of feeding areas in karst aquifers plays a key role in understanding their hydrodynamic and hydrochemical characteristics, along with management and optimal scientific exploitation of them. Given the critical impact of karst water resources on human life and limited number of researcheson karst, any fundamental, applied, and developmental research performed with the aim of modelingkarst landforms and investigating the potential of karst water resources in these areas seems necessary. In order to assess andevaluatethe potential of karst water resources from a qualitativeand quantitative perspective, understand pollution, and vulnerability and also assessrisks facing aquifers,the present study models feeding areas of Dalahoowasaquifer using KARSTLOP model. Methodology The present applied-developmental study is based on library research, field observation, and evaluation methods and seeks to prepare the map of karst water resourcesfeeding Dalahookarst aquifer. Fuzzy logic and gamma operator model were used to produce a zoning map for surface karst development. And finally, a map was produced for the feeding areas of Dalahoowaskarst aquifer using KARSTLOP model. Result Using Natural Breaks method, the zoning map of Dalahoo’ssurface karst development divides the study area are into four classes: areas without karst formations (0-0.224), karst formations with low development (0.224-0.558), karst formations with moderate development (0.588-0.777) and developed karstformations(0.777-0.982).The final map of Dalahoo’sfeeding areas indicates that Bistoon karst aquifer has anannual charge rate of 37 to 81 percent. Discussion and conclusion Systematic study of karst aquifer’s water tables is very important, especially for drinking and agricultural purposes. The final mapof feeding areas, as well as the layers obtained from KARSTLOP method can be used as inputs for modeling groundwater. They may also be used to address practical issues of karst in relation to water management, including water supply, spatial distribution of watersheds, transboundary management of water, and initial assessment of groundwater vulnerability. Results obtained from zoning of feeding areas are consistent with the results obtained from zoning of surface karst development. High feeding values as well as spatial distribution of the aquifer’s feeding zones indicate that the aquifer has a high potential to store groundwater resources.This potentialityshould be properly managed to makeharvestingand protecting groundwaterpossible.
Geographic Data
Taraneh Karimi; Ali Mohammad Safania; Rahim Sarvar; Salaheddin Naghshbandi
Abstract
Extended Abstract IntroductionThe tourism industry is the world's largest industry in terms of income and cultural exchanges. Progress in the field of sports is one of the strategic priorities of planners in countries. Sports tourism is one of the most important developed sectors of the tourism ...
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Extended Abstract IntroductionThe tourism industry is the world's largest industry in terms of income and cultural exchanges. Progress in the field of sports is one of the strategic priorities of planners in countries. Sports tourism is one of the most important developed sectors of the tourism industry. In this regard, the Ministry of Sports and Youth, the National Olympic and Paralympic Committee, the National Olympic and Paralympic Academy, sports federations, physical education, the Ministry of Science, Research and Technology Sports and Education Federation, Ministry of Education and Culture, Sports and Youth Fraction of the Islamic Council, Provincial Sports and Youth Departments, Sports Associations, each of which is a decision-making body in the field are sports The existence of multiple, as well as the simultaneous existence of policy-making and implementation in the Ministry of Sports and Youth, have created inadequacies in these sectors, which, of course, have denied the possibility of competition from the private sector. It seems that the general spirit governing the constitution of the Ministry of Cultural Heritage and Tourism, like the provisions related to tourism in the country's five-year development laws, is a reductionist attitude towards the tourism industry. Due to the uncertainty of the coordination authority in the field of sports tourism decision-making and policy-making, the lack of legal commitment and the need for coordination between sports executive bodies, the multiplicity and diversity of sports tourism tasks. Institutions in charge, the emphasis and clarity of Article 100 of the Law of the Sixth Five-Year Development Plan, based on integrated management, the lack of attention of upstream laws and documents to the priority of sports tourism, the lack of cooperation and the establishment of coherent relations between the government, government and private institutions in the sports tourism industry, preparation An integrated model is important in the sports tourism industry in the country. Considering the number of related organizations in sports tourism and the lack of clarity about the interaction of these organizations with each other, the present research aims to investigate the integrated management of related institutions in the sports tourism industry. This research can play an important role in optimizing management planning in the tourism industry by identifying the effective factors of integrated management of Iran's sports tourism industry. Therefore, the current research aims to provide an integrated management model in Iran's sports tourism industry and seeks to answer this question: What are the effective factors of integrated management in Iran's sports tourism industry?Research methodology and FndingsThe current research has a mixed (qualitative-quantitative) approach based on data search. In the qualitative part, the foundational data approach (Glaser method) has been used to present and develop the theory in the study area of the research. The statistical (qualitative) community includes all the experts in the field of tourism, sports management as well as sports tourism. In this research, the purposeful sampling method was used. Sampling continued until reaching a point where adding a new sample no longer has an effect on the development of research theory, theoretical saturation was achieved after the 20th interview. The main method of data collection was semi-structured in-depth interviews. In the process of qualitative data analysis and performing three stages of coding (open, central and selective), a number of 1167 open codes were obtained, which were reduced to 377 unique open codes after merging and removing commonalities, then the open codes were categorized into 29 central codes and finally In selective coding, they were divided into 8 groups: program policy, task, management, legal, institutional, structural, beneficiaries, tools and resources. In this way, a questionnaire based on the main factors and sub-criteria was compiled on a five-point Likert scale with 119 questions. The validity and reliability of the questionnaire was checked with exploratory confirmatory factor analysis and Cronbach's alpha (96%). The statistical population of the quantitative part included 600 experts and managers of the ministries of cultural heritage, sports and youth, as well as the Environmental Protection Organization, the Civil Aviation Organization, the National Olympic and Paralympic Committee. , travel service offices and private sector activists as well as sports management doctoral students and professors. Frequency, mean and standard deviation methods were used to analyze the information in the descriptive part. The normality of the data was checked with the Kolomogorov-Spirov test (<0.05). In the inferential statistics section of the structural equation modeling test, Friedman's test (P=0.001) and Pearson's correlation coefficient, which showed a significant correlation at the 99% level between the main research criteria; It was used with the help of AMOS and SPSS software.DiscussionUndoubtedly, the existence of various institutional, legal, structural and managerial differences and the involvement of various organizations and institutions in the tourism cause create complicated problems. The current research by observing the situation of sports tourism in Iran, as a strategy for development; He also carefully specified documents and strategic plans at the macro levels; What is observed in the sports tourism industry is the presence of various actors with unequal powers, which has become a fundamental issue in this field of tourism. Despite the emphasis in the general policies of the sixth development plan and the importance of various aspects of development, the laws of some ministries and organizations related to sports tourism do not have the necessary overlap. In this way, it is necessary for the officials and legislators to act transparently, to remove the dispersal of the same laws and the uniform and unsavory implementation of the laws. It should also be noted that; Among the different components of the sports tourism system, management activities and tasks are distributed disproportionately and have led to functional, institutional and managerial differences. The use of tasteful management instead of scientific management and the incompatibility of the actions taken by the previous managers with the attitude of the new managers are among the many problems in the division of the field of sports tourism. It is included in the development of the country.Therefore, integrated management in this field, taking into account the indicators of the current research, is a balance between barriers and facilitating factors of costs and benefits. Considering the participation of various elements to play a role in sports tourism; This integration leads to the creation of a network of actors with different powers, the imbalance in the power of the beneficiaries in the field of sports tourism will lead to forward movement if there is inter-sectoral coordination and systematic dialogue between the relevant institutions. According to the obtained results, in order to achieve the integrated management of sports tourism in Iran, the following solutions can be presented to lay the groundwork and facilitate the implementation of integrated management.Revision of the rules and regulations proposed for tourism-sports in terms of having a guarantee of implementation.Formation of the tourism-sports executive committee with the aim of strengthening the monitoring and control approach.Creating the capacity to plan and manage sports tourism resources, in order to participate and improve local incomes.Establishing an efficient and transparent tax system for the benefit of sports tourism.
Volume 16, Issue 62 , August 2007, , Pages 61-62
Abstract
Introducing the book " Cartography and the Internet".
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Introducing the book " Cartography and the Internet".
Mohammad Sadegh Talebi; Hosein Abarghou'ei
Volume 13, Issue 51 , November 2004, , Pages 62-64
Abstract
Since drought is a very complicated phenomenon, it is very difficult to understand all aspects of this phenomenon and all the problems arising from it. On this basis, there is still no comprehensive definition or a single type of examination of drought unanimously accepted by experts in the field. In ...
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Since drought is a very complicated phenomenon, it is very difficult to understand all aspects of this phenomenon and all the problems arising from it. On this basis, there is still no comprehensive definition or a single type of examination of drought unanimously accepted by experts in the field. In this study, drought trend of Yazd province was examined in terms of frequency of dry and rainy months using standard deviation index (compared to the monthly average rainfall) during a statistical period of 30 years in 26 stations, and it was shown that in the Abarkuh, , Dehshir, Khuyrak, Saghand and Mazra’e-no stations 54% of the time examined was without rain, and in the Abarkuh, , Dehshir, Khuyrak, Saghand and Yazd stations in almost 77% of the statistical period the precipitation was less than the normal monthly precipitation.
Seyyed Hojjat Mousavi
Volume 21, SEPEHR , February 2013, , Pages 70-76
Abstract
Limited and polluted fresh water resources are among the main problems and crisis the world and especially Iran face now and in future. Many natural and human related factors make Iran limited water resources polluted and unusable. One of the main problems of fresh water resources is that different natural ...
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Limited and polluted fresh water resources are among the main problems and crisis the world and especially Iran face now and in future. Many natural and human related factors make Iran limited water resources polluted and unusable. One of the main problems of fresh water resources is that different natural factors make them polluted and salty. Many rivers in Iran have a satisfying water quality at the source of river, but they deteriorate due to some factors in their course or at the estuary. Many natural factors, like salty geological structures, salt domes, long distance and washing sediments of different formations, very high temperature and evaporation, etc. are involved in salinization of these rivers. Because of geological and geographical situations, salt domes are observed in many parts of the country, especially in center, South and North West of Iran, and they can be considered one of the most important factors. Hable rud in Garmsar, Aji Chay (Talkhe rud) in Azarbaijan, Dehrom (One of Rudmand tributary) in Fars, Dalaki and many other rivers face this problem. Every year, tons of salt and sedimentations are being washed from salt domes and formations and enter these rivers, changing the water quality. Implementing some practices, like changing the course of salty water or fresh water, preventing confluence of salty and fresh water rivers, canalizing fresh water rivers, etc. it is possible to revive and restructure these important and rare resources, so that the water will be at least usable for agricultural, industrial and construction projects in upstream and midstream.
