Hydrochemical analyses of a disturbed aquifer of a small island in Malaysia

Mohd Harun Abdullah, Mazlin Mokhtar, Baba Musta, Ahmad Zaharin Aris

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The aquifer of Sipadan Island, off the eastern coast of Borneo, Malaysia, had been found to be affected by seawater intrusion associated with excessive groundwater exploitation, based on hydrochemical analytical work of 1993-2004. This research was attempted to understand the hydrochemical changes of the groundwater attributed to the salinization processes based on major ions composition (Ca2+, Mg2+, Na+, K+, HCO3 -, SO4 2-, Cl-). The initial assessments were done in the year 1993-1994, and then followed by subsequent assessments in 2004. Methods of analyses were adopted from the recommended methods of the APHA. The hydrogeochemical saturation indexes (SI) were computed using PHREEQC program in order to assess the state of equilibrium between groundwater and the minerals present. The results of the analyses indicated that the groundwater had been highly enriched with ions of Na +, SO4 2- and Cl-, reflecting an encroachment of marine water into the aquifer. The groundwater facies in the disturbed aquifer is classified as sodium chloride (Na-Cl) water type. Comparison between two locations showed that higher salinity of groundwater was not the direct factor that contributed to the reduction of SI for carbonate minerals such as calcite, aragonite and dolomite in the study area. This information was later conveyed to the relevant authorities of the island and has been utilized by them in coming out with urgent management actions in protecting and remediating the disturbed aquifer situation.

Original languageEnglish
Pages (from-to)2043-2051
Number of pages9
JournalFresenius Environmental Bulletin
Volume17
Issue number12 A
Publication statusPublished - 2008

Fingerprint

Aquifers
Groundwater
aquifer
groundwater
Calcium Carbonate
Salt water intrusion
Carbonate minerals
saturation
Ions
ion
Water
Calcite
salinization
mineral
Sodium chloride
aragonite
sodium chloride
Sodium Chloride
Minerals
Coastal zones

Keywords

  • Groundwater
  • Hydrochemistry
  • Major ions
  • Malaysia
  • Oceanic island
  • Seawater intrusion

ASJC Scopus subject areas

  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry

Cite this

Hydrochemical analyses of a disturbed aquifer of a small island in Malaysia. / Abdullah, Mohd Harun; Mokhtar, Mazlin; Musta, Baba; Aris, Ahmad Zaharin.

In: Fresenius Environmental Bulletin, Vol. 17, No. 12 A, 2008, p. 2043-2051.

Research output: Contribution to journalArticle

Abdullah, Mohd Harun ; Mokhtar, Mazlin ; Musta, Baba ; Aris, Ahmad Zaharin. / Hydrochemical analyses of a disturbed aquifer of a small island in Malaysia. In: Fresenius Environmental Bulletin. 2008 ; Vol. 17, No. 12 A. pp. 2043-2051.
@article{eceb9cd2df6c481f968571b270abe567,
title = "Hydrochemical analyses of a disturbed aquifer of a small island in Malaysia",
abstract = "The aquifer of Sipadan Island, off the eastern coast of Borneo, Malaysia, had been found to be affected by seawater intrusion associated with excessive groundwater exploitation, based on hydrochemical analytical work of 1993-2004. This research was attempted to understand the hydrochemical changes of the groundwater attributed to the salinization processes based on major ions composition (Ca2+, Mg2+, Na+, K+, HCO3 -, SO4 2-, Cl-). The initial assessments were done in the year 1993-1994, and then followed by subsequent assessments in 2004. Methods of analyses were adopted from the recommended methods of the APHA. The hydrogeochemical saturation indexes (SI) were computed using PHREEQC program in order to assess the state of equilibrium between groundwater and the minerals present. The results of the analyses indicated that the groundwater had been highly enriched with ions of Na +, SO4 2- and Cl-, reflecting an encroachment of marine water into the aquifer. The groundwater facies in the disturbed aquifer is classified as sodium chloride (Na-Cl) water type. Comparison between two locations showed that higher salinity of groundwater was not the direct factor that contributed to the reduction of SI for carbonate minerals such as calcite, aragonite and dolomite in the study area. This information was later conveyed to the relevant authorities of the island and has been utilized by them in coming out with urgent management actions in protecting and remediating the disturbed aquifer situation.",
keywords = "Groundwater, Hydrochemistry, Major ions, Malaysia, Oceanic island, Seawater intrusion",
author = "Abdullah, {Mohd Harun} and Mazlin Mokhtar and Baba Musta and Aris, {Ahmad Zaharin}",
year = "2008",
language = "English",
volume = "17",
pages = "2043--2051",
journal = "Fresenius Environmental Bulletin",
issn = "1018-4619",
publisher = "Parlar Scientific Publications",
number = "12 A",

}

TY - JOUR

T1 - Hydrochemical analyses of a disturbed aquifer of a small island in Malaysia

AU - Abdullah, Mohd Harun

AU - Mokhtar, Mazlin

AU - Musta, Baba

AU - Aris, Ahmad Zaharin

PY - 2008

Y1 - 2008

N2 - The aquifer of Sipadan Island, off the eastern coast of Borneo, Malaysia, had been found to be affected by seawater intrusion associated with excessive groundwater exploitation, based on hydrochemical analytical work of 1993-2004. This research was attempted to understand the hydrochemical changes of the groundwater attributed to the salinization processes based on major ions composition (Ca2+, Mg2+, Na+, K+, HCO3 -, SO4 2-, Cl-). The initial assessments were done in the year 1993-1994, and then followed by subsequent assessments in 2004. Methods of analyses were adopted from the recommended methods of the APHA. The hydrogeochemical saturation indexes (SI) were computed using PHREEQC program in order to assess the state of equilibrium between groundwater and the minerals present. The results of the analyses indicated that the groundwater had been highly enriched with ions of Na +, SO4 2- and Cl-, reflecting an encroachment of marine water into the aquifer. The groundwater facies in the disturbed aquifer is classified as sodium chloride (Na-Cl) water type. Comparison between two locations showed that higher salinity of groundwater was not the direct factor that contributed to the reduction of SI for carbonate minerals such as calcite, aragonite and dolomite in the study area. This information was later conveyed to the relevant authorities of the island and has been utilized by them in coming out with urgent management actions in protecting and remediating the disturbed aquifer situation.

AB - The aquifer of Sipadan Island, off the eastern coast of Borneo, Malaysia, had been found to be affected by seawater intrusion associated with excessive groundwater exploitation, based on hydrochemical analytical work of 1993-2004. This research was attempted to understand the hydrochemical changes of the groundwater attributed to the salinization processes based on major ions composition (Ca2+, Mg2+, Na+, K+, HCO3 -, SO4 2-, Cl-). The initial assessments were done in the year 1993-1994, and then followed by subsequent assessments in 2004. Methods of analyses were adopted from the recommended methods of the APHA. The hydrogeochemical saturation indexes (SI) were computed using PHREEQC program in order to assess the state of equilibrium between groundwater and the minerals present. The results of the analyses indicated that the groundwater had been highly enriched with ions of Na +, SO4 2- and Cl-, reflecting an encroachment of marine water into the aquifer. The groundwater facies in the disturbed aquifer is classified as sodium chloride (Na-Cl) water type. Comparison between two locations showed that higher salinity of groundwater was not the direct factor that contributed to the reduction of SI for carbonate minerals such as calcite, aragonite and dolomite in the study area. This information was later conveyed to the relevant authorities of the island and has been utilized by them in coming out with urgent management actions in protecting and remediating the disturbed aquifer situation.

KW - Groundwater

KW - Hydrochemistry

KW - Major ions

KW - Malaysia

KW - Oceanic island

KW - Seawater intrusion

UR - http://www.scopus.com/inward/record.url?scp=61949220946&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=61949220946&partnerID=8YFLogxK

M3 - Article

VL - 17

SP - 2043

EP - 2051

JO - Fresenius Environmental Bulletin

JF - Fresenius Environmental Bulletin

SN - 1018-4619

IS - 12 A

ER -