Rustadi, Rustadi and Darmawan, I Gede Boy and Nandi Haerudin, NH and Suharno, Suharno and Agus Setiawan, Agus (2021) Geophysical approach for assessment of seawater intrusion in the coastal aquifer of Bandar Lampung, Indonesia. In: 6th IC – STAR, International Conference on Science, Technology, and Interdisciplinary Research 2020, Bandar Lampung.

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Official URL: https://iopscience.iop.org/article/10.1088/1757-89...

Abstract

Overexploitation in 1980-2000 caused a lot of groundwater loss in the aquifer coastal of Bandar Lampung. Groundwater has been degraded with increasing salinity due to the intrusion of seawater. In 2013, the intrusion extended 400 m from the coastline. Subsurface geological mapping is carried out to examine alluvial formation's material constituents and the ability to transfer seawater to land. Three well explorations combined with three geoelectric tomography and 51 points of gravity. The gravity method is used to map structures that can connect coastal aquifers and land aquifers. Meanwhile, geoelectric tomography to map the presence of aquifers and low resistivity zones by seawater intrusion. The coastline has relatively shallow aquifers at a depth of 2 - 10 m in a sand layer with coral inserts, while the lower part is composed of silt and clay. The aquifer has experienced a decrease in resistivity of fewer than 10 ohms.m appears in the three circular patterns, caused by seawater. In addition to the permeable zone of shallow aquifers, there is a northwest- southeast trending structure that can channel seawater to land aquifers.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TN Mining engineering. Metallurgy
Depositing User: RUSTADI
Date Deposited: 06 Nov 2021 10:53
Last Modified: 06 Nov 2021 10:53
URI: http://repository.lppm.unila.ac.id/id/eprint/35296

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