Water Quality Zonation Based on Chemical Analysis on Surface Water Supplies for Drinking, Agriculture and Industry in the Southeastern of Sistan and Baluchestan Province

In this study, the quality of surface water supplies in the southwestern region of Sistan and Baluchestan Province were evaluated for the purposes of drinking, industry and agriculture based on the results of chemical analysis. Firstly, the results of the analysis of surface waters from four selected stations were studied, then it prepared in GIS environment. In order to determine the quality of water for drinking, Ca, Mg, Na, TDS, TH, Cl, SO4 and HCO3 parameters are used and it was determined that the water of all stations was considered as inappropriate indicating hardness of the water in the area. Wilcox method is also utilized to determine the water quality in agricultural use. In the graph of this index, the horizontal axis index is water salinity in micro masses per centimeter and the vertical axis in relation to sodium absorption (SAR). Studies have also shown that the water of all stations is one of the classes C2-S1, C3-S1, C3-S2. During the statistical years it is considered to be agriculture. Also, in determining the quality of water for industrial use, the Langeous Saturation Index (LSI), which is in fact the difference between the actual pH of water and the saturated water content of calcium carbonate, was used and it was found that in all stations only three years of water for industrial use It is in a state of equilibrium and in the rest of years it is a precipitating and corrosive state. Therefore, the conditions in this area for the construction of water related to industries are also inadequate. To monitor, control and manage the system, the qualitative results of the analysis is entered into the GIS environment and the surface water database of the southwestern region of Sistan and Baluchestan province was formed and in the first step, zoning of important water quality issues to support the correct decision of the face accepted.