Investigation of Groundwater Quality in the Area of Irrigation and Drainage Networks for Agricultural and Drinking Purposes (Case Study of DASHTEABAS)

Recognizing quality of groundwater as one of the most important and vulnerable sources of water supply in recent decades is a necessary and important issue. Water purification is sensitive and time consuming; therefore, investigation of the quality of groundwater supply is essential. In this research, in order to study chemical compounds of groundwater, 21 observed wells were sampled in the summer of 2013 year and important parameters of samples were measured and calculated for agricultural and drinking uses. Also Piper diagram was used to determine hydrochemical facies of the groundwater area. The results showed that dominant type of groundwater hydrochemical facies of region was calcium sulfate (Ca-S04). According to World Health Organization standard, among wells of region just H9, L15, O12, and L6C wells was suitable for drinking use and these wells in terms of sodium hazard and change of soil structure for agriculture use, had a good to admissible situation . Also, groundwater of that region had moderate permeability index; therefore, it should be used for soil irrigation with sufficient permeability and cultivation of salt tolerant plants.