Assessment of Groundwater Quality in Chardoley Plain Located in Kurdistan Province

This research was conducted on Chardoly groundwater aquifer located between Kurdistan and Hamadan provinces in the west part of Iran. For this purpose, the aquifer groundwater data qualities were used from year 1381 to 1387. During all years of investigation, different water quality parameters were analysied and compared to different drinking water, agriculture, corrosion and sedimentation standards. The analysis were completed based on 25 wells groundwater data qualities. In this study the selected groundwater quality parameters for comparison were as pH, HCO3-, SO42-, Cl-, Mg2+, TH, Ca2+, K+, Na+ TDS, Co32- and EC. Finally, the results of quality analysis was entered in GIS software under descriptive layers and Co-Kriging interpolation method based on the minimum interpolation error, and detected to produce quality maps. The results of groundwater quality investigation showed a decrease on groundwater quality from year 1383 to 1385 and an improve and recovery quality from year 1387. These changes were in agreement with a drop in groundwater levels in 1384 because of low rainfall and extra groundwater use, because of extra wells drilling in the resigon. Moreover, the results showed a lower groundwater quality for northern and near the exit part of Chardoley plain aquifer.