Groundwater exploration using integrated geophysics method in hard rock terrains in Mount Betung Western Bandar Lampung,Indonesia

作     者：Rustadi I Gede Boy Darmawan Nandi Haerudin Agus Setiawan Suharno 

作者机构：Department of Geophysical EngineeringUniversity of LampungBandar LampungIndonesia Department of Environment ScienceUniversity of LampungBandar Lampung 

出 版 物：《Journal of Groundwater Science and Engineering》 (地下水科学与工程（英文版）)

年 卷 期：2022年第10卷第1期

页      面：10-18页

学科分类：081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by grants from Indonesia’s National Research and Innovation Agency Doctoral Dissertation Research scheme 

主　　题：Geoelectric Gravity Groundwater Hard Rocks VES 

摘      要：The presence of hard rock in Mount Betung has caused the misalignment of the groundwater aquifers,and resulted in many drilling failures for *** integrated geophysics method using gravity survey and Geoelectric Vertical Electrical Soundings(VES)were conducted to study the effect of basement and hard rock on groundwater *** the gravity method,38 mapping points were carried out randomly,with a distance of 1-2 km ***,from the geoelectric method,51 VES points were acquired at the foot of Mount *** acquisition was conducted with a Schlumberger configuration with AB/2=1 m to 250 *** results show the Bouguer Anomaly in the west is 50-68 mgal due to the presence of hard rock in Mount *** anomaly responds to relatively shallow hard rocks near *** rocks composed of andesite and breccia normally present at the depth of 5-180 m during well *** isopach mapping from VES data(at AB/2=50 m,100 m,and 150 m)shows the dominant constituents of hard *** in hard rock contribute to secondary porosity,which could be a prospect zone that transmit *** finding shows that the fractures are randomly scattered,causing several well failures that have been ***,the fractures in the hard rock at the foot of Mount Betung acts as conduits between recharge at Mount Betung and the aquifer in the Bandar Lampung Basin.