Finding the Potential of Groundwater Contamination in Baghmalek Pain in GIS Condition through DRASTIC Model

Document Type: Original Article

Authors

1 Department of Water Sciences, Ahvaz, Islamic Azad University, Ahvaz, Iran.

2 Department of Civil Engineering and Water Resourcesو shoushtar Branch, Islamic Azad University, shoushtar, Iran.

Abstract

Ground water is regarded as an important source of sweet water because it has less pollution potential and it has high reserve capacity compared with surface water. Therefore, it I necessary to prevent pollution from ground water, considering management of ground water resources in line with quantitative management of water resources. In this research the potential vulnerability of ground water pollution in Baghmalek plain has been studied considering the geology, hydrology and hydrogeology characteristics of the region. The DRASTIC model has been applied and the final map of aquifer vulnerability using overlappingtechnic of GIS has been prepared. The DRASTIC model is a quantitative model; it is abbreviation of 7 parameters influential in transferring pollution including depth to water table, net recharge, aquifer media, soil media, topography, impact of vadose zone and hydraulic conductivity. In the region under investigation, GIS software has been applied to capture layers related to these parameters and to capture the final map of vulnerability because of various capabilities of GIS software in inputting, outputting and processing of data. Finally, weighting, rating and integrating the above-mentioned seven layers, the DRASTIC index was calculated for the whole region which has been estimated to be 62 to 129 in that area. The results of the model shows that parts of northern plain are more vulnerable and southern and eastern parts of the plain are potentially less vulnerable. 

اختری، ی. چیتسازان، م. کلانتری، ن. رحیمی، م.ح. ) 1385 (. ارزیابی آسیبپذیری آبخوان دشتهای زویرچری و
خِران با استفاده از مدل DRASTIC در محیط GIS ، همایش ژئوماتیک 85 ، سازمان نقشهبرداری کشور، تهران.
آغاسی، ع. آزادشهرکی، ف. آزادشهرکی ،ف . حسن،م. ) 1388 (. ارزیابی آسیب پذیری آب زیرزمینی دشت هشتگرد
به کمک روش دراستیک، هشتمین کنگره بین المللی مهندسی عمران.
فاریابی، م.) 1385 (. ارزیابی کمی و کیفی آب زیرزمینی دشت باغملک، پایان نامه کارشناسی ارشد، دانشکده زمین
شناسی دانشگاه شهید چمران اهواز.

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