Application of geoelectric method in the study of hydraulic parameters of groundwater

Geoelectrical method can be regarded as one of the newest methods that can play an important role in determining hydraulic parameters of the aquifer layers with cost prohtive and acceptable accuracy. In this study, attempt has been made to use the geoelectrical method in areas where the bedrock remains at upper level and aquifer is porous. Accordingly, a study area for estimating hydraulic parameters Zarrinabad Gol Tappeh plain located in Zanjan province, one of the northwestern provinces of Iran, was selected. The determination of hydraulic coefficients by the geoelectric method is based on the calculations presented by Singal and Nivas, calculations that use the modified transverse resistance. 38 soundings were obtained in Zarrinabad Gol Tappeh plain by several field visits and therefore 18 electrical soundings were selected to determine the hydraulic parameters . The interpretation of soundings data was performed using IPI2win software. Evaluations on data shows that the constant values (kб) are composed of three independent classes in Zarinabad plain.pointed out, The hydraulic coefficients can be determined according Singal and Nivas earliar classifications. The calculated results showed that the obtained hydraulic coefficients, has no significant difference between the drilling logs and the result of geoelectric method. The correlation between the transmissivity t and the modified transverse resistance (with a correlation coefficient of 0.97) indicates the accuracy of experiments in this plain and also confirms previous studies of Singal and Niwas.