Saturation states of carbonate minerals in a freshwater-seawater mixing zone of small tropical island’s aquifer

Aris, Ahmad Zaharin and Praveena, Sarva Mangala and Abdullah, Mohd Harun (2010) Saturation states of carbonate minerals in a freshwater-seawater mixing zone of small tropical island’s aquifer. Chinese Journal of Geochemistry, 29 (3). pp. 278-286. ISSN 1993-0364

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Abstract

Groundwater is a crucial resource on the Manukan Island as it is the only source of freshwater available on the island. The aquifer has deteriorated to a high degree, during the last decade. Nine domestic wells were sampled from March 2006 to January 2007 to probe the hydrochemical components that influence the water quality. Geochemical data on dissolved major constituents in groundwater samples from the Manukan Island revealed the main processes responsible for their geochemical evolution. The results using statistical analyses, graphical method and numerical model output (PHREEQC) showed that the groundwater was chemically highly enriched in Na and Cl, indicative of seawater intrusion into the aquifer as also supported from the Na-Cl signature on the Piper diagram. From the PHREEQC simulation model, calcite, dolomite and aragonite solubility showed positive values of the saturation indices (SI), indicating supersaturation which led to mineral precipitation condition of water by these minerals.

Item Type:Article
Keyword:Manukan Island; Seawater intrusion; Hydrochemistry; Saturation index
Subject:Saltwater encroachment - Manukan Island
Subject:Water chemistry
Subject:Carbonate minerals
Faculty or Institute:Faculty of Environmental Studies
Publisher:Springer Verlag
DOI Number:10.1007/s11631-010-0457-3
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s11631-010-0457-3
ID Code:16622
Deposited By: Khairil Ridzuan Khahirullah
Deposited On:28 Jun 2012 10:42
Last Modified:05 Nov 2012 01:11

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