Geological Factor Causing Water Decrease of the Baturagung Reservoir, Based on ERT Geoelectric Application

Kusumayudha, Sari Bahagiarti and Zakaria, Muhammad Faizal and Setyaningrum, Tuti (2023) Geological Factor Causing Water Decrease of the Baturagung Reservoir, Based on ERT Geoelectric Application. Iraqi Geological Journal, 56 (1D). pp. 103-113. ISSN 24146064

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Abstract

The Baturagung reservoir, a small artificial lake is located in the Gedangrejo village,
Karangmojo district, Gunungkidul regency, Yogyakarta Special Region, Indonesia. Initially,
the reservoir was built on hilly geomorphology with volcanic sandstone lithology intended to
meet the agricultural water needs of the people in the surrounding area, and as a tourist spot as
well. Since 2019, there has been a decrease in the volume of reservoir water so that the
reservoir is never fully filled with water. Due to the decrease in reservoir water volume,
residents' water needs are not being met, and visitors to this place are reduced. Therefore, it is
important to accomplish a study with the purpose to identify the factors that cause reservoir
water depletion, such as the conditions of geomorphology, lithological variations, geological structures, and hydrogeology of the area. The methodologies used in this study are field surveys, surface mapping, and the application of the electric resistivitytomographymethod.
The results show that there is a weak zone with aresistivity ranges 4.24– 45.9 Ωm, northeast-southwest trend, interpreted as a fault crossing the study area. It is deduced that the
fault is active, causing the tearing of the geomembrane underlying the reservoir, initiating water leakage from the reservoir to the southwest direction.

Item Type:	Article
Uncontrolled Keywords:	Baturagung reservoir; Fault; Geological factor; Water; Indonesia
Subjects:	Q Science > QE Geology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User:	SARI BAHAGIARTI KUSUMAYUDHA
Date Deposited:	15 Jun 2023 08:15
Last Modified:	15 Jun 2023 08:20
URI:	http://eprints.upnyk.ac.id/id/eprint/35944

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