APPLICATION OF 2D SURVEYS GEOELECTRIC METHOD TO DETERMINING WATER DISTRIBUTION POTENTIAL ON THE CIVIL ENGINEERING ITB FIELD

• Main Author: Hidayanti, Titi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/67200
• Institution: Institut Teknologi Bandung

Water is very important in life because living things cannot live without it. Water comes from several sources, such as surface water and groundwater. The increasingly limited amount of water requires investigation. One method that is commonly used is the geoelectric method. It is a geophysical method that works by injecting electric current into the Earth's surface through current electrodes. This research aims to learn the basic principles of the geoelectric method and determine the potential distribution of water in the civil engineering ITB field using 2D geoelectric method by Wenner-Schlumberger configuration. The measurements were carried out on 3 tracks with a length of 120 m in each one. The electrodes used for each track were16 electrodes and the distance between the electrodes was 8 m. Depth obtained in this survey was 22.9 m with a value of average absolute error by 9,83%. Moreover, the resistivity range obtained for track 1 was 3,51 to 270 ?m, track 2 was 3,56 to 190 ?m, and track 3 was 3,06 to 171 ?m. The detected water was shallow groundwater which was estimated to be in the resistivity range of 30,5 to 108 ?m. Water was spread at several points with the predominant amount of water at a depth of 10 to 13 m. This was supported by the presence of wells around the site that has a depth about 10 m. Because measurements were carried out in limited areas and limited tools so that a fairly shallow depth was obtained. Then, if you want to obtain at a greater depth data, it can be done using other geoelectric tools or by other methods. In addition, to support the research result related to the presence of water, drilling should be carried out at the research location.