عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Inflation of population and rising living standards in many countries need to be enhanced the high quality water suitable for different uses such as agricultural, industrial and drinking sections. Groundwater is one of the most important water supply sources which is encountered with many problems such as drawdown, recharge reduction due to low rainfall and different natural and man-made pollutions. Therefore, monitoring of groundwater quality is very important. In the present research, spatial and temporal analysis of monthly groundwater level fluctuations, from 2003 to 2007, through 50 point wells were investigated. World Health Organization standards and Wilcox method were used in order to classify the drinking and agricultural water usages, respectively. In order to analyze the groundwater quality criteria, Geographic Information System version 9.2 was used. The results indicated higher concentrations of salinity during the wet seasons compared to dry seasons. Therefore, with increasing decline of water level, TDS and EC concentrations had a downward trend. Spatial analysis of groundwater quality showed that the groundwater quality of Qazvin plane is desirable and undesirable for drinking and agriculture by respectively 10 & 6 percent. Also 0.4 and 83.6 percent of the groundwater are desirable and moderate for agriculture usages, respectively.