Assessment of seawater intrusion to the agricultural sustainability at the coastal area of Carey Island, Selangor, Malaysia

Baharudin Tajul , Mohamad Faizal and Taib , Samsudin and Hashim , Roslan and Zainal Abidin, Mohd Hazreek and Rahman, Nur Islami Assessment of seawater intrusion to the agricultural sustainability at the coastal area of Carey Island, Selangor, Malaysia. Arabian Journal of Geosciences . ISSN 1866-7538 (Unpublished)

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Official URL: http://dx.doi.org/10.1007/s12517-012-0651-1

Abstract

Groundwater suitability for agriculture in an island with limited recharge area may easily be intluenced by seawater intrusion. The aim of this study was to investigate seawater intrusion to the suitability of the groundwater for oil palm cultivation at the ex-promontory land of Carey Island in Malaysia. This is the first study that used the integrated method of geo-electrical resistivity and hydrogeochemical methods to investigate seawater intrusion to the suitability of groundwater for oil palm cultivation at two different land cover condition. The relationship between earth resistivity, total dissolved solids and earth conductivity was derived with crop suitability classification according to salinity, used to identify water types and also oil palm tolerance to salinity. Results from the contour conductivity maps show that area facing severe coastal erosion and area still intact with mangrove forest exhibits unsuitable groundwater condition for oil palm at the unconfined aquifer thickness of 15 and 3 1 m, respectively. Based on local sea-level rise prediction and Ghyben-Herzherg assumption (sharp interface), the condition in the study area, especially in severe erosion area, by the twenty-first century will no longer be suitable for oil palm plantation. The application of geo-elechcal method combined with geochemical data, aided with the information on environmental history and oil palm physiography, has demonstrated that the integration of techniques is an effective tool in defining the status of agricultural suitability affected by salinity at the coastal aquifer area.

Item Type:Article
Uncontrolled Keywords:oil palm; groundwater salinity seawater intrusion; geo-electrical resistivity method; contour conductivity map
Subjects:G Geography. Anthropology. Recreation > GB Physical geography
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
ID Code:3889
Deposited By:Normajihan Abd. Rahman
Deposited On:15 Mar 2015 16:53
Last Modified:15 Mar 2015 16:53

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