Recharge and aquifer response: Manukan islands aquifer, Sabah, Malaysia

Praveena, Sarva Mangala and Abdullah, Mohd Harun and Aris, Ahmad Zaharin and Bidin, Kawi (2010) Recharge and aquifer response: Manukan islands aquifer, Sabah, Malaysia. EnvironmentAsia, 3 (1). pp. 72-81. ISSN 1906-1714

Full text not available from this repository.

Official URL: http://www.tshe.org/ea/abstracts/2010_3-1_11.html

Abstract

Manukan Island is a small island located in North-West of Sabah, Malaysia was used as a case study area for numerical modeling of an aquifer response to recharge and pumping rates. The results in this study present the variations of recharge into the aquifer under the prediction simulations. The recharge rate increases the water level as indicated by hydraulic heads. This shows that it can alter groundwater of Manukan Island which has been suffering from an overexploration in its unconfined the aquifer. The increase in recharge rate (from 600 mm/year to 750 mm/year) increases the water level indicated by hydraulic heads. A reduction in pumping rate (from 0.072 m3/day to 0.058 m3/day) not only increases the amount of water levels in aquifer but also reduces the supply hence a deficit in supply. The increase in hydraulic heads depends on the percentage reduction of pumping and recharges rates. The well water has 1978.3 mg/L chloride with current pumping (0.072 m3/day) and recharge rates (600 mm/year). However, with an increased of recharge rate and current pumping rate it has decreased about 1.13%. In addition, reduction in pumping rate made the chloride concentration decreased about 2.8%. In general, a reduction in pumping with an increase in recharge rate leads to a decreased in chloride concentrations within the vicinity of cone of depression. Next, to further develop the numerical model, the model should focus on climate change variables such as consequences of climate change are increase in air temperature, increase in sea surface temperature, and more extreme weather conditions. These parameters are considered critical parameters for climate change impact modeling in aquifers. The behavior of the aquifer and its sustainable pumping rate can be done by applying a computer modeling component.

Item Type:Article
Keyword:Small island; Recharge rate; Pumping rate; Groundwater sustainability
Subject:Aquifers - Manukan Island - Sabah - Malaysia
Subject:Groundwater recharge
Subject:Artificial groundwater recharge - Manukan Island - Sabah - Malaysia
Faculty or Institute:Faculty of Environmental Studies
Publisher:Thai Society of Higher Eduction Institutes on Environment
ID Code:16445
Deposited By: Khairil Ridzuan Khahirullah
Deposited On:02 Jul 2012 01:40
Last Modified:29 Oct 2012 03:28

Repository Staff Only: item control page

Document Download Statistics

This item has been downloaded for since 02 Jul 2012 01:40.

View statistics for "Recharge and aquifer response: Manukan islands aquifer, Sabah, Malaysia"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.