Using the AHP method to evaluation of aquifer potential pollution in geographical information system (GIS)
Paper Details
Using the AHP method to evaluation of aquifer potential pollution in geographical information system (GIS)
Abstract
In this paper, Eshtehard plain pollution potential calculated by the AHP method and compared with the results of DRASTIC method. Seven parameters data were prepared and entered in GIS system. This data include the depth to water table, net recharge, aquifer media, soil, topography, De saturated media and conductivity. In this investigation, with slight changes in this method’s parameters to calculate net recharge (called Piscopo), better results have been obtained for the study area in Iran. The results of performance the DRASTIC model, shows that aquifer vulnerability index which got from ranks and weights each parameters sum, minimum is 74 and the maximum is 185.The average of index is calculated 129 in the plain. Also by AHP method, with consideration of four parameters, such as: conductivity, depth to water table, precipitation, slope and comparison the parameters two by two, the weight of each parameter had obtained. So accordingly, a new model had present to evaluation the aquifer vulnerability. The average of vulnerability in Eshtehard plain is 56 percent by this model.
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