GROUNDWATER MODELING IN SANGON HAMLET AND SURROUNDING AREAS USING FINITE DIFFERENCE METHOD

Tedy Agung Cahyadi (), Rika Ernawati, Hana Trijayanti, M. Iqbal Ansori and Ilham Firmansyah
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Tedy Agung Cahyadi: Universitas Pembangunan Nasional “Veteran” Yogyakarta
Rika Ernawati: Universitas Pembangunan Nasional “Veteran” Yogyakarta
Hana Trijayanti: Universitas Pembangunan Nasional “Veteran” Yogyakarta
M. Iqbal Ansori: Universitas Pembangunan Nasional “Veteran” Yogyakarta
Ilham Firmansyah: Universitas Pembangunan Nasional “Veteran” Yogyakarta

Earth Sciences Pakistan (ESP), 2021, vol. 5, issue 2, 76-81

Abstract: Sangon Hamlet is included in the mountains which are dominated by andesite rocks and volcanic breccias which cross each other and have a distribution of joints and faults forming a fracture. The fracture is a medium for draining water in the area. There is a difference in ground water level as seen from the well. To re-detail the groundwater flow that has been formed, a groundwater flow pattern modeling is carried out. The modeling is done by numerical method assisted by Modflow Flex Software. For building the model, it is necessary to prepare a concept model, calibration and validation. In this area there are 2 aquifer systems, namely unconfined aquifers and aquitards. Furthermore, the model was calibrated using the sensitivity analysis method. The calibration results are obtained, namely the RMS value of 8.74% with a standard error estimate of 1.27 m and a correlation coefficient of 0.98. From this model, it is known that the flow of water moves from the northwest-north area in the form of a plateau by heading to the east-southeast area which is a lower plain and towards the Plampang River.

Keywords: Aquifer; Calibration; Fracture; Groundwater; Software (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:zib:zbnesp:v:5:y:2021:i:2:p:76-81

DOI: 10.26480/esp.02.2021.76.81

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