Hydrogeological and Hydrochemical Anomalies of Badrud Aquifer, Southeast Kashahn, with Emphasis on Geoelectrical Parameters
Subject Areas : آب شناسیHamidReza Nasseri 1 , Farshad Alijani 2 , Morteza Darvishi Sedehi 3 , faezeh Falsafi 4
1 - Shahid Beheshti University
2 -
3 - Faculty of Earth Scienses, Shahid Beheshti University, Tehran, Iran
4 - Faculty of Eath Sience, Shahid Beheshti University, Tehran, Iran
Keywords: Aquifer, Badrud, fault, Tomography, Hydrogeological Anomaly, Hydrochemistry,
Abstract :
Abstract This study investigates hydrogeological and hydrochemical anomalies in the Badrood plain aquifer, located in the southeast of Kashan. Given the significant differences in salt concentrations and hydrochemical parameters across various parts of the plain, the potential presence of buried structures such as faults as a cause of hydrogeological anomalies exists. Therefore, an effort has been made to examine the impact of tectonic structures on groundwater resources and to improve the management of these resources in the Badrood plain. The research methodology includes collecting data on electrical conductivity, pH, and temperature (from 40 groundwater samples in two periods: May and June 2018) and employing geoelectric methods using the Schlumberger array in three profiles and 61 sounding points. Data interpretation was performed using IPI2win and RES2DINV software for one-dimensional and two-dimensional modeling of electrical resistivity. The results indicate that the Badrood plain aquifer exhibits significant anomalies in terms of hydrochemical parameters, which do not align with the groundwater flow pattern. Apparent resistivity maps at various depths and electrical tomography sections indicate the presence of at least one possible fault line in the region, which could act as the main cause of hydrochemical anomalies. In the Badrood aquifer, this structural anomaly coincides with hydrochemical variations and, from a hydrogeological perspective, is characterized by a significant difference in the discharge of water wells in the surrounding area. These findings emphasize the need to consider tectonic factors in the planning and management of groundwater resources. Furthermore, by integrating geoelectric methods and hydrochemical analyses, a novel approach is presented for identifying buried geological structures and investigating their effects on the quality and quantity of groundwater.
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