Electrical resistivity tomography applied to groundwater aquifer at downstream of Chih-Ben Creek basin, Taiwan

Abstract

Groundwater resource investigations primarily involve inferring groundwater levels and recharge sources from factors such as the distributed location and range, subsurface geological structure, and flow paths of groundwater sources. This study conducted an investigation on the underground aquifer at the downstream of the Chih-Ben Creek basin, Taiwan. In addition, convenient, rapid, and accurate two-dimensional electrical resistivity tomography (ERT) was employed for evaluations. The cross-sectional ERT image indicates that the low-resistivity region in the stratum at survey line CB01 may be a groundwater deposit or fracture zone. This region can be divided into three major segments. The segment that is 0-50 m from the survey line exhibits a decreasing trend and is thus inferred to be a recharge source. Survey line CB02 can be generally divided into four layers, with the second layer containing a greater amount of groundwater. This layer is an aquifer with a depth of approximately 25-100 m below the ground surface and 75-100 m in thickness. The base of the aquifer slopes toward the east and primarily possesses a lithological composition of slate and sandstone with explicit and fractured joints.

Monitoring landslides with geophysical and geodetic observations

“…Solid particles in general strata are a combination of common rock-forming minerals, which have a low conductivity and can be considered as insulators (Ekinci et al 2013;Yeh et al 2014).…”

Geochemistry of groundwater and saltwater intrusion in a coastal region of an island in Malacca Strait, Indonesia

“…Pumping test is a method to determine hydraulic properties [12], which could be used to identify the movement of the con-taminant, the possibility of saltwater intrusion, and the aquifer capability as the primary source of water [13]. In addition, the electrical resistivity tomography (ERT) method could become a supporting data to model the geometry of aquifer [14] and locating contaminant [15]. This method could also detect the pathway of pollution [16] and the boundary of freshwater and saltwater from the difference of electrical current [17].…”

Electrical Resistivity Tomography and TDEM Applied to Hydrogeological Study in Taubaté Basin, Brazil

“…Electrical resistivity method [3] [4] [5] [6] and TDEM [7]- [18] have been successfully applied individually and also jointly [19] [22]. Their applications also include mining, geotechnical and environmental studies [24] [25], among others.…”