One of the most sensitive parameters in groundwater investigation and modeling is estimation of

groundwater recharge. In this study, parallel to tracer analysis and groundwater modeling, a

geoelectric method was adopted in evaluation of recharge mechanism and aquifer reservoir changes.

The results of geoelectric method were compared and used in tracer analysis and groundwater

modeling. In this research, Geoelectric method was used with two specific objectives in mind. First,

the relation between soil electrical resistivity obtained by dipole method and soil moisture and soil

minerals investigated and showed promising results. Next, the transmisivity of Hashtgerd Aquifer was

estimated by boreholes of Schlumberger method.

To obtain more accurate information from reservoir characteristics, the mechanism and rate of

recharge between boreholes in the past years were investigated and soil moisture and soil minerals

between boundaries were evaluated and verified. The groundwater fluctuations in the region was

analyzed in a more accurate manner comparing to the traditional methods