Abstract
The aquifers exploration has been conducted at the western part of Banda Aceh, Indonesia. This research aims to explore the aquifer layer beneath the surface and to obtain the cross-section model of the aquifer. The Vertical Electrical Sounding (VES) method was applied to investigate the aquifer layer. The VES method worked as the current penetrated into the ground using of two electrodes and the potential response due to its current being measured by another two electrodes. Ten grid points of VES has performed in western part of Krueng Aceh of Banda Aceh using the ARES (Automatic Resistivity Meter). The Res1Dinv and curve matching computer software used in VES data processing and analysis. The result shows the resistivity value of aquifer in Banda Aceh city at the range of 1 – 12 Ωm for freshwater, and 0.1 – 0.6 for brackish water layer. The first aquifer (water table) found at a depth of 0.5 to 2 meters beneath the surface. The 2-meters water table mostly located near the coastal zone or downstream zone of Krueng Aceh basin and shallow depth of 0.5 meters on the upstream. More than one aquifer layers were found beneath the surface, they were separated by aquitard layer consisting of silt to clay layers.
Highlights
Banda Aceh is a capital city of Aceh province located on the tip of Sumatra Island
We refer to the actual sub-surface model of Banda Aceh developed by Ploethner & Siemon [11] and Tohari, et al [10] from the bore hole and Cone Penetrating Test (CPT) data of VES01, VES02, and VES05 administratively located outside the city, but close to the boundary of Banda Aceh
Ten Vertical Electrical Sounding (VES) data reveal the several layers of the aquifers beneath the western part of Krueng Aceh of Banda Aceh
Summary
Banda Aceh is a capital city of Aceh province located on the tip of Sumatra Island. The number of the population in Banda Aceh increases each year leading to the increasing need of water consumption and usage. The exploration for water resources is compulsory as the population and the city are growing. The use of technology, especially geophysical methods, to investigate groundwater is necessary to reduce the cost and time, to estimate the site and the depth of bore hole, or well. The Geo-electric method can map and interpret subsurface conditions based on the electrical properties of the soil [2]. Implementing the Geo-electric to investigate the groundwater in Aceh province has been conducted by Rusydy, et al [3]; Kurnia, Mulia,
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