ارزيابي آسيب‌پذيري آبخوان دامنه- داران با استفاده از مدل فازي

Aquifer vulnerability means the potential for the penetration and release of pollutants into groundwater and represents the ability of a system to naturally and artificially affect pollutants. Determining aquifer vulnerabilities and managing the exploitation of water resources is one of the best ways to prevent groundwater pollution and identify areas exposed to the aquifer line. Damaneh-Daran aquifer is located in the catchment area of Gavkhouni and human activities in recent decades have caused severe pollution that it is necessary to assess the extent of its pollution. In this study, fuzzy model has been used to assess the vulnerability of Damane-Daran aquifers and the parameters eva‎luated in this study are: water table depth, feeding network, aquifer type, soil type, topographic slope, unsaturated zone constituents, conductivity Hydraulic. Finally, in order to calibrate the fuzzy model, the concentration of nitrate in the samples taken in wet and dry seasons was measured from 20 wells. The final zoning map showed that the center and part of the southwest and northwest of the region as well as a small part of the southeast of the region have high vulnerabilities that do not match the map prepared from the nitrate concentration and therefore, the fuzzy model is not accurate enough to determine aquifer vulnerabilities. Also, in 5 of the samples, the nitrate concentration was higher than the allowable limit. The main reason for the risk of nitrate contamination in the Damane-Daran aquifer is the interaction of inherently vulnerable factors of topography and net nutrition. Accordingly, human activities are the source of nitrate contamination in the Damane-Daran aquifer.

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