hooshmand attaee; alireza bostany; Reihaneh Soltani; gity salahi
Abstract
Drought is one of the most complex and unknown natural disasters that causes irreparable economic, social and environmental damages to rural settlements. The purpose of the present study is to evaluate the vulnerability of rural settlements to drought using the Coopras model in the villages located in ...
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Drought is one of the most complex and unknown natural disasters that causes irreparable economic, social and environmental damages to rural settlements. The purpose of the present study is to evaluate the vulnerability of rural settlements to drought using the Coopras model in the villages located in the drought areas of Darab township. First, the drought areas of the township were determined using the rainfall statistics of 10 rain gauge stations based on the SPI (Standardized precipitation Index) model. Then, using Shannon's entropy model, 19 vulnerability variables were investigated in drought zones. Finally, using the multi-criteria decision-making model of Coopras, the ranking of the villages located in the study area was done. The results show that drought has had the greatest impact on the variables of destruction of surface and underground water sources, reduction of per capita income of farmers, abandonment of agricultural lands due to drought and migration of villagers. The results related to the ranking of the villages affected by drought show that the villages of Daulat-Abad, Darnganeh, Shahrak-Bostan and Bahadoran were the most vulnerable to the phenomenon of drought and the villages of Tal-Bargah, Junan, Nasravan and Qala Naw were less vulnerable than the surrounding villages.
mohammad mehdi Taghi zadeh; hossein kiumarsi
Volume 1, Issue 1 , January 2013, , Pages 63-74
Abstract
Current drought events and extreme extraction of underground water during the last few years have led to considerable reduction of underground water levels in many parts of Iran. The problem is more tangible in semi-arid areas where the lives of flora and fauna are closely related to the underground ...
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Current drought events and extreme extraction of underground water during the last few years have led to considerable reduction of underground water levels in many parts of Iran. The problem is more tangible in semi-arid areas where the lives of flora and fauna are closely related to the underground waters. Namdan plain located in Fars province is a fertile agriculture area which encounters the reduction of underground water levels due to high extraction and consumption of such waters. The rate of reduction is different according to different parts of the study area. Therefore, identification of areas with high reduction rates is a clear necessity in order to make any rational decisions for improving the underground water resources. The present study has applied GIS to zoning the area into three parts namely permitted, provisioned, and prohibited in terms of underground water extraction. The zoning classification was based on annual monitoring and interpolation of changes occurred in water levels of wells in the study area during 1997 to 2011. The results show that there is a direct relation between the location of deep wells and spatial distribution of prohibited and provisioned areas of underground water extraction. Spatially there were1131 (87%) deep wells out of 1311 in the mentioned zones which attracts the serious attentions of authorities to act more controls on the extraction of underground water in the study area.
