Identification of groundwater depth in the Northern Sukoharjo Regency using Vertical Electrical Sounding (VES) method to overcome agricultural irrigation drought

Abstract

Groundwater use in Sukoharjo increases every year. This study aims to identify the depth of groundwater in the northern part of Sukoharjo district as a solution to fulfill agricultural irrigation using the Vertical Electrical Sounding (VES) method. This study used the OYO resistivity meter. Research data processing uses uses Non-Linear Optimization method to obtain the true layer resistivity value vertically. The research was conducted in 5 different locations using the Vertical Electrical Sounding (VES) method with Schlumberger configuration. The length of the research site is 250 - 300 meter with a target depth of more than 120 meters. Based on the value of rock resistivity can be determined the depth of groundwater level in the northern Sukoharjo district. The results of the interpretation showed the groundwater level is at a depth of 15.2 - 82.21 meter consisting of a layer of top soil, sand, gravel and clay rocks.