Hydrochemical analysis of groundwater in the shallow aquifers of the Manukan and Mabul Islands, Malaysia

Ahmad Zaharin Aris, and Mohd Harun Abdullah, and Musta Baba, (2008) Hydrochemical analysis of groundwater in the shallow aquifers of the Manukan and Mabul Islands, Malaysia. In: Hydrological Sciences for Managing Water Resources in the Asian Developing World, 8-10 June 2006, Guangzhou, China.

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Abstract

Groundwater is a critical resource in small islands. Extensive practice of extraction of groundwater from shallow aquifers in islands potentially induces seawater intrusion into the aquifers. Hydrochemical analysis was performed to understand the groundwater chemistry based on salinity and various ion compositions (Ca2+, Mg2+, Na+, K+, HCO3-, SO42-, Cl-) of the groundwater of Manukan and Mabul Islands, Malaysia. The results indicate that groundwater in the study areas is highly enriched with Na+, HCO 3- and Cl-. At some sampling locations, ion concentrations (Na+, Ca2+, HCO3-, SO42-, Cl-) and TDS exceeded the World Health Organization standards for drinking water. The high concentrations of Na +, Mg2+ and Cl- in the groundwater indicate an encroachment of seawater into the islands' aquifer. This finding was also supported by the values of Na/Cl and Cl/HCO3. The groundwater in the two islands ranged from Na-HCO3 to Na-Cl water types. The ionic composition of the groundwater was influenced by the cation exchange processes that were attributed to seawater intrusion. Copyright © 2008 IAHS Press.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: Cation exchange, Groundwater, Mabul island, Manukan island, Seawater intrusion
Subjects: ?? GB1001-1199.8 ??
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 04 Apr 2011 07:43
Last Modified: 02 Sep 2015 08:08
URI: http://eprints.ums.edu.my/id/eprint/2676

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