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Open Access Article
1 - Assessing the relationship between urban land use and thermal islands, Case study: Yazd desert city
کمال امیدوار کمال امیدوار سعیده موید فر سعیده موید فر مهران فاطمی مهران فاطمی مهدی نارنگی فرد مهدی نارنگی فردUrban thermal islands are one of the most common urban climatic phenomena in which some urban areas, especially urban centers, are several degrees warmer than the surrounding areas. The study of this phenomenon and its mechanism of study is very important for urban plan MoreUrban thermal islands are one of the most common urban climatic phenomena in which some urban areas, especially urban centers, are several degrees warmer than the surrounding areas. The study of this phenomenon and its mechanism of study is very important for urban planning. This research has been applied in terms of analytical method and in terms of purpose and has been done with the aim of investigating the effect of applications on the temperature of Yazd desert city. To illustrate this relationship, images from the 2005 and 2015 Terra satellites measuring the Aster were used. The results of the studies show that the physical expansion of the city of Yazd in different historical periods, has led to the advancement of this city in the marginal salt and sand surfaces, so that construction and asphalt areas, increase and areas Salt and sand and barren lands on the outskirts of the city have declined. As a result, most of the thermal islands of Yazd city have been formed in marginal areas and barren lands. In this regard, there is a negative correlation between the two variables of vegetation and land surface temperature during the 10-year period, which indicates that the size of the heat islands has increased as the green space decreases Manuscript profile -
Open Access Article
2 - Shifts in Köppen-Geiger climate zones over Balochistan plateau of Pakistan and its potential challenges to Iran
محمدیوسف احمدپور محمدیوسف احمدپور تقی طاوسی تقی طاوسی حمید نظری پور حمید نظری پور Climate classification systems(CCSs) are important tools for understanding the specific characteristics of a region's climate. The main purpose of these classifications is to determine the climate types and to find their similarities, differences and variability. More Climate classification systems(CCSs) are important tools for understanding the specific characteristics of a region's climate. The main purpose of these classifications is to determine the climate types and to find their similarities, differences and variability. Climate zones are threatened by global warming and climate change. The purpose of this study is to evaluate the possible shifts of climate zones over the Balochistan plateau of Pakistan and its potential challenges to Iran based on the improved Koppen-Geiger CCSs. The data includes average monthly precipitation and temperature of the Delaware university dataset for the 1990-2017 periods. The results show the main climate with two subgroups in the study area. These climates include a hot desert climate(BWh) and a cold desert climate(BWk). The hot desert climate is dominated in southern and western and the cold desert climate in northern and western regions.In recent decades, the increasing range of hot desert climate limited the cold desert climate. The range of the cold desert climate has declined sharply, reaching from about 55-65 to about 50-55 percent. In contrast, the range of hot desert climate increased in response to these conditions, reaching from about 35-45 to about 45-50 percent.Therefore, it is expected that the zones of the hot desert climate will increase rapidly in the future. These conditions will add to environmental quality and resource depletion problems especially in border areas with Iran and can pose important challenges such as climate migration, border security, and health. The results of this research can play a significant role in adopting forward-looking policies to address the impacts and challenges of climate change on the border regions of Iran. Manuscript profile -
Open Access Article
3 - FutureProjection of temperature and precipitation changes in the southern coast of Caspian sea
مریم کثیری مسعود گودرزی مسعود گودرزی غلامرضا جانباز قبادی غلامرضا جانباز قبادی صدرالدین متولی صدرالدین متولیTemperature and precipitation are among the most important climatic elements in the study of climate change due to significant temporal and spatial changes, and the projection of their changes is agreat importance in environmental planning and hazards. Therefore, in thi MoreTemperature and precipitation are among the most important climatic elements in the study of climate change due to significant temporal and spatial changes, and the projection of their changes is agreat importance in environmental planning and hazards. Therefore, in this study, future projection of temperature and precipitation changes in the southern cost ofcaspian sea was investigated. For this purpose, the data of CanESM2 model was used under three scenarios (RCP2.6, RCP 4.5 and RCP 8.5) using the SDSM downscaling model the temperature and precipitation changes in three different periods (2021-2050, 2051-2080- and 2081-2100) were examined in relation to the basic period (1989-2018). To calibration and validation the SDSM model, stationary observation data and NCEP data were used, as well as MAE, MSE, RMSE and R2 indicators. The results showed that the SDSM model has the ability to simulate temperature and precipitation changes in the study. Based on the results of the CanESM2 model output, the minimum and maximum temperatures will be increase in all studied periods and each period compared to the previous period, the average amount for the minimum temperature is 2 oC and for the maximum temperature, it will be 2.2 oC compared to the base period. Most of the temperature changes are related to the western regions of the study area. The projection of precipitation changes also shows that except ofGorgan station in other stations study, the amount of precipitation will decrease in all future periods compared to the base period, the average of which will be during the next period (2021-2100),Will be equal to 3.6%. Most of its changes are related to the central and western areas of the study area. Also, the RCP8.5 scenario showed the most changes in temperature and precipitation. Manuscript profile -
Open Access Article
4 - Spatiotemporal Changes in Snow-Cover related to the Land Surface Temperature over Central Alborz
امیرحسین حلبیان امیرحسین حلبیان سینا صلحی سینا صلحیThe area, covered by snow or snow-cover variations, is one of the important factor in climatologic and hydrologic studies, that could be also useful and applicable in water management and environmental studies, specifically when it is combined with topographic character MoreThe area, covered by snow or snow-cover variations, is one of the important factor in climatologic and hydrologic studies, that could be also useful and applicable in water management and environmental studies, specifically when it is combined with topographic characteristics. In this research Land Surface Temperature (LST) and snow-cover interactions were considered. These environmental indicators interactions, combined with focal topographic characteristics such as slope, play a major role in snow-cover persistency. As a result, the influences of these factors had taken into account in central Alborz mountainous belt in Iran northern boundary. To achieve this goal, snow-cover (SC) and land surface temperature (LST) obtained from Aqua and Terra satellite images that are carrying Modis sensor, used in a the temporal range of 2003 up to 2018. Snow cover data with spatial resolusion of 500m analyzied using python programming language. The analysis performed related to the aspect as a major topographic characteristic in the scope of terrain modeling with using moving window and cell by cell raster analysis thechniques. The result, shows a strong relationship between terrain aspect and snow coverage in the central sector of Alborz Mountains. Land surface temperature and snow-cover had an inverse trend, specifically during winter and fall seasons. June LST (Khordad) was high according to the higher zenith angle of the sun in this period of year. There is a clear gap between the LST values of northern and southern aspects of central Alborz that could be result of mountain orientations to the sun rays, higher humidity levels and denser vegetation cover in the northern part. Southward areas, show higher temperature in almost all months. Directional analysis of LST, demonstrated, that maximum levels of LST are observed in the south-faced and specifically southeastward area and the minimum levels observed in northeastward and specifically northward area during all months. Southward area of the alborz mountainous wall, located at the latitude band of 36N, experienced a higher sun ray incident angle and thus having higher LSTs in southern and southeastern parts. Finally in almost all temporal periods (including month, season and year) higher LSTs in southern aspects (South, Southeast and southwest) in compared to northern one (North, Northeast and northwest) has been observed. Manuscript profile -
Open Access Article
5 - Thermal analysis of building site with Climate resilience planning strategy in coastal areas, Case study: Noor city coasts
فاطمه طاهری فاطمه طاهری شهریار خالدی شهریار خالدی رضا برنا رضا برناCoastal buildings are always vulnerable to waves, moisture and corrosion, and their resilience plays an important role in reducing these damages. Climate resilience with a comprehensive and consistent strategy has the potential to reduce the risk in site design and buil MoreCoastal buildings are always vulnerable to waves, moisture and corrosion, and their resilience plays an important role in reducing these damages. Climate resilience with a comprehensive and consistent strategy has the potential to reduce the risk in site design and building physics and help improve decision-making in emergency response. This research is targeted at the Applied Research Group. According to the data and the output model, this research is in the category of research research in terms of implementation method. Findings of research in Noor Coastal Area with Ecotech software show that the coefficient of building compatibility index is 0.94, which indicates the resilience of buildings in climatic crises and this coefficient with the type and The direction of the site is different and less than one. The ventilation coefficient for changing the consumed air is 2.24 watts per square meter per hour. The thermal load index for determining energy control in a building is 15.5 and the cooling load is 21 Cͦ. To increase the building's climate resilience, passive design with low-delay thermal mass South and east windows are recommended to increase the heat load in winter and windows north and west are recommended to create natural ventilation and increase the cooling load in summer.. Manuscript profile -
Open Access Article
6 - Investigating the vulnerability of Khanj plain aquifer - Larestan fissure using drastic model
Abdolrasool GhanbariGroundwater is the second largest source of fresh water in the world. About a third of the world's population depends on this resource. Existence of important sources of diffuse and point pollutants, due to human activities on the ground and the penetration of these pol MoreGroundwater is the second largest source of fresh water in the world. About a third of the world's population depends on this resource. Existence of important sources of diffuse and point pollutants, due to human activities on the ground and the penetration of these pollutants into the aquifer, reduces the quality of groundwater. Vulnerability assessment is a low-cost method in identifying areas prone to pollution that plays a key role in the management of water resources. It is a suitable management tool to prevent groundwater pollution. For this research, the hydrogeological parameters of the drastic model include water depth, net nutrition, aquifer environment, soil environment, topography, effects of unsaturated area and hydraulic conductance, stinging pain. Larestan fissure, located in the south of Fars province, was studied. Arc GIS software was used to prepare vulnerability maps by overlapping hydrogeological layers. According to the findings of this study, the groundwater of the study plain is at high risk of contamination, so that about 62% of the area is in moderate to high vulnerability. These areas are generally located downstream and in the center of the plain. Considering that groundwater is the most important water source in the region, prevention of pollutants entering groundwater by creating quality protection zones around water sources and observing the rules of discharging pollutants to receiving sources, is an effective solution. To maintain the quality of these resources. Important management tools such as vulnerability maps and quality privacy are important for planning for proper deployment of land uses and their management on the aquifer. Manuscript profile -
Open Access Article
7 - The role of the range of movements "rock fall" in the Hazards rail (rail axis Zahedan-Kerman).
مریم نعمتی مریم نعمتی مصطفی خبازی مصطفی خبازی علی‌اصغر عبداللهی علی‌اصغر عبداللهی علی قضات علی قضاتRailway axes cross various shapes and geoforms on their trajectories, some of which are natural environments which can present risks for railway lines. Falling rocks are among the dangers that still threaten the country's railway fleet and cause damage every year. In th MoreRailway axes cross various shapes and geoforms on their trajectories, some of which are natural environments which can present risks for railway lines. Falling rocks are among the dangers that still threaten the country's railway fleet and cause damage every year. In this study, we first tried to map the risk assessment of rockfall in the Zahedan-Kerman railway (Nosrat Abad region) using geological, soil, vegetation, fault distance, channel distance, temperature, precipitation, slope and Prepared for the gradient, then the density of the OLI and Google Earth satellite images and the fracture densities in the study area were extracted using software ENVI 5.3, GEOMATICA and ARC GIS. The results of this study showed that the highest density of lineaments corresponds to the map of the zoning of the rockfall, in particular at 15 km in the median axis of the Nusratabad railway line. On the other hand, in the field surveys carried out with the workshop experts, the workshop manager and the technical director of the Sistan Train and the Baluchestan province, 4 stations were identified likely to fall in the mountainous area , of which 3 more likely The release phenomenon was selected, the last environmental examination as well as quantitative calculations on the triple stations showed that the mass of the second station with 521136/864 m3 was the most sensitive bulk volume and station 2 with 779278/883 m3 was the second largest base. And finally, the third row belongs to the last station with 898599/774 cubic meters of volume of eastern falling mass. Manuscript profile -
Open Access Article
8 - پایش شاخص‌های خشکسالی در شهر زاهدان در بازه‌های زمانی مختلف
محمدرضا پودینه محمدرضا پودینه محمدحیدری نیا محمدحیدری نیا سید روح ا...موسوی سید روح ا...موسوی حسین دوستی مقدم* حسین دوستی مقدم*هدف پژوهش حاضر بررسی شاخص‌هایخشک‌سالیدر بازه‌های زمانی مختلف در شهر زاهدان است. جهت دستیابی به اهداف پژوهش از داده‌های بارش ماهانهایستگاه سینوپتیک زاهدان در دوره زمانی (2012– 1995) استفاده شد. نتایج این پژوهشنشان می‌دهد که خشکسالی شدید و بسیار شدید به‌وسیله شاخص Moreهدف پژوهش حاضر بررسی شاخص‌هایخشک‌سالیدر بازه‌های زمانی مختلف در شهر زاهدان است. جهت دستیابی به اهداف پژوهش از داده‌های بارش ماهانهایستگاه سینوپتیک زاهدان در دوره زمانی (2012– 1995) استفاده شد. نتایج این پژوهشنشان می‌دهد که خشکسالی شدید و بسیار شدید به‌وسیله شاخص ZSIدر هیچ‌یک از دوره‌های زمانی تشخیص داده نشد. این شاخص برای مطالعات مقایسه‌ای چندان مفید تشخیص داده نشد. همچنین برای پی بردن به رابطه بین شاخص‌ها ضریب همبستگی تمام شاخص‌ها در سه بازه زمانی سه، شش و دوازده ماهه بهدست آمد که نتایج نشان داد که هر چه بازه زمانی افزایش می‌یابد هماهنگی سه شاخص جهت پایش خشکسالی در زاهدان افزایش می‌یابد. هماهنگی در رفتار این سه شاخص را می‌توان در بررسی نوسانات مشاهده کرد که به‌طور کلی شاخص SPI نسبت به شاخص‌هایZSIو CZIخشکسالی را بهتر نشان می‌دهد. همچنین شاخص ZSI بیشترین درصد خشکسالی کلی را نسبت به شاخص SPI و CZI در همه بازه‌های زمانی داشته است که علت آن سهم زیاد این شاخص در وضعیت خشکسالی ضعیف و متوسط است Manuscript profile
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