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Evaluating freshwater lens morphology affected by seawater intrusion using chemistry-resistivity integrated technique: a case study of two different land covers in Carey Island, Malaysia

Tajul Baharuddin, Mohamad Faizal and Othman, A. R. and Taib, S. and Hashim, R. and Zainalabidin, Mohd Hazreek and Radzuan, M. A. (2013) Evaluating freshwater lens morphology affected by seawater intrusion using chemistry-resistivity integrated technique: a case study of two different land covers in Carey Island, Malaysia. Environmental Earth Sciences, 69 (8). pp. 2779-2797. ISSN 1886-6280

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Abstract

Freshwater lenses are vital to small island communities but are susceptible to seawater intrusion due to the physical changes in the shoreline land cover. The effect of seawater intrusion and irrigation water on a coastal unconfined aquifer beneath naturally preserved mangrove and deforested mangrove-barren belt was investigated in Carey Island. Analysis of the total dissolved solids (TDS) and earth resistivity (ER) using a geochemistry- electrical integrated technique gave a TDS–ER relationship capable of predicting freshwater lens morphology affected by sea-irrigation water. The study result shows freshwater was fourfold thicker in close proximity of the mangrove forest than the mangrove barren area; the further the shoreline from the mangrove thickest section, the less vulnerable was the seawater intrusion and the more fresh the irrigation water, and hence the greater the freshwater availability potential.

Item Type: Article
Uncontrolled Keywords: freshwater lens; mangrove; seawater; intrusion; earth resistivity; TDS
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
Divisions: Faculty of Civil and Environmental Engineering > Department of Infrastructure and Geomatic Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 28 Jun 2016 03:15
Last Modified: 28 Jun 2016 03:15
URI: http://eprints.uthm.edu.my/id/eprint/8119
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