Assessment of seawater intrusion based on geochemical and isotopic data in Makassar coastal area, South Sulawesi, Indonesia

Authors

  • Sunu Ardhi Nugroho Master Program of Geological Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta 55281, Indonesia
  • Wahyu Wilopo Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta 55281, Indonesia https://orcid.org/0000-0001-6059-6318
  • Ahmad Taufiq Ministry of Public Works and Housing, Jakarta 12110, Indonesia

DOI:

https://doi.org/10.15243/jdmlm.2024.121.6563

Keywords:

coastal area, geochemistry, groundwater, isotope, seawater intrusion

Abstract

Makassar coastal area has experienced rapid development and has shown various negative impacts from groundwater overexploitation, such as seawater intrusion. This study aimed to assess seawater intrusion based on geochemical and isotopic data in the Makassar coastal area. The research was carried out by field measurement and taking the groundwater samples to the laboratory for geochemical and isotope tests. Geochemical analysis of seawater intrusion was based on TDS, EC, Cl-, Simpson ratio, Ca enrichment, BEX, Na/Cl ratio, and the piper trilinear diagram typer of water. Isotope analysis of seawater intrusion is based on comparing oxygen and deuterium isotopic data from groundwater samples with seawater, river, and rainwater. The results showed that some areas near the sea indicated seawater intrusion in both the semi-unconfined and unconfined aquifers. The indicated seawater intrusion spread in the north Tallo, Mamajang, and Tamalate subdistricts.

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Submitted

13-05-2024

Accepted

26-07-2024

Published

01-10-2024

How to Cite

Nugroho, S. A., Wilopo, W., & Taufiq, A. (2024). Assessment of seawater intrusion based on geochemical and isotopic data in Makassar coastal area, South Sulawesi, Indonesia . Journal of Degraded and Mining Lands Management, 12(1), 6563–6577. https://doi.org/10.15243/jdmlm.2024.121.6563

Issue

Vol. 12 No. 1 (2024)

Section

Research Article

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