Estimation and study of privacy interference of exploitation wells to identify vulnerable areas of the aquifer (Case study: Ravansar-Sanjabi aquifer in Kermanshah)

In the climatic conditions of the country, due to the large volume of groundwater abstraction by wells and also considering the number of wells drilled, especially in recent years, the calculation of privacy in order to apply proper management on the conservation and optimal use of groundwater resources is of particular importance. In this regard, one of the issues that concerns those involved in groundwater protection is the density and proximity of exploitation wells on the one hand and overdraft by exploiters on the other hand. Therefore; in this research, at first, the well function was solved mathematically and the impact radius of each well in the two modes of application of corrective discharge (based on the area under cultivation) and case discharge (exploitation license discharge) was obtained. Then the radius map of the impact of the total wells in the area was drawn and then the areas with privacy interference were identified and drawn. Based on the obtained results, the average discharge of all exploitation wells in the corrective and case discharge mode was calculated to be 18.37 and 11.14 l/s, respectively was obtained. The results also showed that in the most optimistic case, about 20% of the total aquifer area has privacy interference.This causes the local wells to undergo simultaneous operation, severe localized cones and the aquifer to be subjected to unusual stresses, which in the long run causes a permanent and lasting decline in the aquifer and in the long run results to subsidence of the ground.