Spatial modeling of geological formations based on water quality parameters in Parishan catchment

Quality protection of surface and groundwater as one of the most valuable national resources is vital. For this purpose, Parishan basin was selected as a sample of semi-closed inland Zagros basins and geographical weight regression (GWR) modeling was performed using 25 observation wells of the relationship between water quality parameters and geological constructs. In this model, water quality parameters such as (EC, TDS, SAR, CL, Na, K, 4 SO) are used as dependent variables and geological formations are used as independent variables. The modeling results showed that the highest correlation based on qualitative parameters such as potassium, chlorine and electrical conductivity is related to the center and east of Parishan basin. Water quality is also effective. Then, by forming the Moran index autocorrelation, the relationship between water quality parameters and geological structures was evaluated. The model with high variability accuracy established a direct relationship between these two parameters and by doing this step, the model validation was confirmed. Finally, based on the prepared maps and the high power of the GWR model, managers and planners can use it to identify sensitive points of changing water resources for spatial modeling.