Aquifer Characterization using 2D Electrical Resistivity Imaging in Kidangpananjung, Cililin District, West Java

Southeast Asian Conference on Geophysics

Marsan, Dery^1 ; Azimmah, Azizatun^1 ; Patera Adli, Dida^1 ; Muthi'A, J.M.^1 ; Yuantoro, Ethis^1 ; Fatkhan^2

Undergraduate Program of Geophysical Engineering, Institut Teknologi Bandung, Indonesia^1

Exploration and Engineering Seismology Research Group, Institut Teknologi Bandung, Indonesia^2

关键词: 2-D resistivities;    Aquifer characterization;    Confined water;    Electrical resistivity imaging;    Geographical coordinates;    Least-square inversion;    Resistivity measurement;    Water saturated rock;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/62/1/012014/pdf
DOI  :  10.1088/1755-1315/62/1/012014

来源: IOP

【 摘 要 】

Water shortage is a big problem for those who live in the region with unsustainable water resource like in Kidangpananjung - a village in Cililin district West Java. With elevation of 1070 m above mean sea level, Kidangpananjung stands on crest of a hill with the geographical coordinate of 113.5°BT, 6.97°LS. Based on geological survey, the outcrop which found in Kidangpananjung indicates that this region consists of pyroclastic rock such as fresh tuff and andesitic breccia. Four springs are found in the foothills with elevation of ±1040 m above mean sea level which indicates the location of water table. To map the groundwater distribution more precisely and understand the aquifer rock more accurately, geo-electrical approach was conducted. This method is chosen based on the principle that the survey target, the water saturated rock, would give a relatively low resistivity contrast than its surrounding rocks. The target aquifer is considered as confined aquifer at 30m - 40m beneath Kidangpananjung. The data acquisition was designed with two lines of wenner-alpha arrays with 235 meters length each. Two lines of profiling were chosen in order to map the underground layer and its resistivity and thicknesses. The resistivity measurements were carefully interpreted by using least-square inversion technique by using RES2DINV program. The purpose of this research is to understand the characteristics and depth of Kidangpananjung aquifer. Therefore, it can be used to be a reference in groundwater drilling in order to improve the living of the inhabitants of Kidangpananjung.