GIS
Camelia Alavi; Sedigheh Kianejad; Seyyedeh Alameh Sabbagh
Abstract
Tehran as the largest city in Iran, is one of the most polluted cities in the world, so necessity of accurate detection of contaminants and identifying contaminated areas for reducing their severity is obvious. The aim of this research was prepared Tehran air pollution map and determining the areas with ...
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Tehran as the largest city in Iran, is one of the most polluted cities in the world, so necessity of accurate detection of contaminants and identifying contaminated areas for reducing their severity is obvious. The aim of this research was prepared Tehran air pollution map and determining the areas with the highest polluted. For studying air pollution situation in Tehran, after gathering concentration of 5 main Atmospheric pollutants (CO, NOx، SOx، O3، PM25) from 20 air pollutant recorder station, three Interpolation methods in ArcGIS software include: Kriging, radial basis function RBF and inverse distance weighted IWD have been used. In Additon, for comparing methods and selecting the best of them, root- mean- square error RMSE and the correlation coefficient R2 had been used. It determined that in most of parameters IDW had better accuracy for zoning pollution of the area by checking the RMSE values. For achieving results with using mentioned methods, map of air quality limits in the area was ready and by combining five maps and weighing them into each parameter, general pollution map of the area was prepared. Results showed that in Monoxide carbon pollution zoning map, most of the pollution was related to the unhealthy class, in Nitrogen Oxide and Ozone was related to very unhealthy class and in particle matter and sulfur oxide was related to unhealthy class. In final map also most portion was related to unhealthy class. Overlay Masudieh station with 1091 pollution weight had the most pollutants and dangerous weather conditions and Darrus station with 628 pollution weight had better position.
environment
Mohammad Ali Firoozi; Mostafa Mohammadi Deh cheshme; Jafar Saeedi
Volume 8, Issue 15 , June 2017, , Pages 13-28
Abstract
Evaluation of environmental sustainability is inevitable because this is one of the most important tools in the planning process due to sustainable development policy making and planning. This research has a descriptive-analytical and applied method. The aim of study is to assess the environmental sustainability ...
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Evaluation of environmental sustainability is inevitable because this is one of the most important tools in the planning process due to sustainable development policy making and planning. This research has a descriptive-analytical and applied method. The aim of study is to assess the environmental sustainability indicators in Ahvaz Metropolis with emphasis on air pollution and industrial pollutions. To achieve the purpose, we have used the indices of AHP for scoring. To analyze spatial data, GIS software is used. To evaluate urban environmental sustainability, we have also emphasized on two indicators of air pollution and industrial pollutions. The findings of the research indicate that the city of Ahwaz has instable environmental conditions based on air pollution. One region with effect coefficient 0.326 has the highest weight and the second region with the weight 0.033 has the lowest rates of infection among other regions. The dust storms also affect the areas of the city of Ahwaz. Evaluation of industrial pollution also shows that eight regions of the city have the highest infection rate effect (0.331) and district one with effect coefficient of 0.024 has the lowest level of industrial pollution in the urban areas.
Mohammad Rahimi; Mohammad Reza Yazdani; Moslem Asadi; Mohammad Taleb Haydari
Volume 6, Issue 11 , May 2015, , Pages 99-116
Abstract
This study aimed to examine the relationship between local-regional climatological data and the concentration of suspended particles in Sanandaj. By the use of the index of suspended particles extracted from the DREAM model, the data reported by the weather station in Sanandaj as well as regional climatological ...
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This study aimed to examine the relationship between local-regional climatological data and the concentration of suspended particles in Sanandaj. By the use of the index of suspended particles extracted from the DREAM model, the data reported by the weather station in Sanandaj as well as regional climatological data (meteorological data in Middle East) collected through examining various levels of atmospheric synoptic maps and MODIS satellite images, dust transport systems in Kurdistan province were investigated. Correlation analysis between the average monthly temperature and the index of suspended particles revealed that there was a direct correlation between these two parameters so that during this study, the highest amount of suspended particles belonged to May and July. There was also a negative correlation between the average monthly humidity and the index of suspended particles. The overall results of this study indicated that the region has been faced with a drought in recent years. In fact, lack of rainfall and humidity along with seasonal wind patterns in the Middle East, particularly in the warm seasons of the year, have caused the pollution of suspended particles in Sanandaj.
