Investigating the process of quality changes ofunderground water, preparing a zoning map inKhorram Abad aquifer using GIS

Awareness of water quantity and quality is one of the important requirements inplanning and development of water resources and their protection and control. Therefore, the purposeof this study is quantitative and qualitative analysis of groundwater in Khorramabad plain using GIS.The Mankendal statistic for the time series of the electrical conductivity parameter was set at -۰.۹۲Tostudy the water quality for drinking water, Schuler diagram was used. . The amount of transferabilityof this aquifer from the margin of the plain to the center of the plain increases from ۵۰ square metersper day to the center of the plain to ۱۳۰۰ square meters per dayThe value of Mankendal statistics forthe time series of the electrical conductivity parameter was determined to be -۰.۹۲ which are locatedbetween the Sarvak and Kashkan formations in geological deposition or in other words from thestratigraphic point of view. . The amount of transferability of this aquifer from the margin of the plainto the center of the plain increases from ۵۰ square meters per day to the center of the plain to ۱۳۰۰square meters per day. The Mankendal statistic for the time series of the electrical conductivityparameter was set at -۰.۹۲. Accordingly, due to the negative statistics, the trend of EC changes inKhorramabadplain has been decreasing but not significant.