عنوان مقاله [English]
The study area is located in 90 km N-E Ahwaz and 20 km S-E Masjed Soleyman. Long-term weather statistics of the region's meteorological stations indicates that the region with a mean annual precipitation of 464.8 mm, an average annual temperature of 25.3 ° C and a relative humidity of 29% is a region with a semi-arid climate according to the Demartenne classification, Most rainfall occurs in winter. Formations exposed in this area in order of the oldest to new ones include the present-day sediments, the sandstone-Marni Aghajari formation, limestone formations, Marni Mishan, Gachsaran Formation, Asmari limestone formation, respectively. Wells are the main sources of water supply in the region. In this paper, the aquifer of Golgir Plain was studied using GIS software to prepare the criterion maps, to weigh them and combine them. Preparation of these maps was done using ArcGIS 9.2 software package and fuzzy modeling was done using MATLAB software. ArcGIS software index has been selected to implement the overlapping model. For fuzzy integration, due to its high ability work with Raster data as a matrix and also its simple programming, the MATLAB software was used as well as PCI Geomatica software is used. Finally, eight intrinsic vulnerability maps are obtained. For each vulnerability map, correlation between vulnerability index and nitrate concentration have been calculated. This correlation is determined by Spearman correlation coefficient.