بررسی تغییرات کیفی منابع آب باختر کوهسرخ با استفاده از شاخص کیفی ‏GQI‏ در محیط ‏GIS

Water quality assessment is very important in the area where water resources are used as drinking water. monitoring of polluted waters and ‎its distribution are applied in water management planning. it requires information on the location, the amount and distribution of chemical ‎parameters on the samples from studied area. identification of contaminant type, the sites, and also optimum use of water for different ‎purposes are helpful. thus, for these purpose six chemical parameters of tds، ‏so42-‎، ‏cl-‎، ‏na+‎، ‏mg2+‎، ‏ca2+, which are referred by who ‎standard were examined to apply for gqi method by gis.‎‏ ‏the gqi method of groundwater quality evaluated and prepared a groundwater ‎quality map in west region of kooh-sorkh. values of gqi index vary between 82.9% to 94.8%, which indicate the groundwater quality ‎placed in suitable to acceptable class of quality. groundwater quality map indicate that gqi index values reduced from lateral sides to the ‎center of studied region. it may be affected by geological factors such as lithology, current direction and also hydrothermal system in the ‎area.‎