Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia

Time-lapse resistivity measurements and groundwater geochemistry were used to study salinity effect on groundwater aquifer at the ex-promontory-land of Carey Island in Malaysia. Resistivity was measured by ABEM Terrameter SAS4000 and ES10-64 electrode selector. Relationship between earth resistivity...

Full description

Bibliographic Details
Main Authors:	M. F., Tajul Baharuddin, Samsudin, Taib, Roslan, Hashim, Mohd Hazreek, Zainal Abidin, Mohd Fakhrurrazi, Ishak
Format:	Article
Language:	English English
Published:	Springer Netherlands 2011
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/20633/ http://umpir.ump.edu.my/id/eprint/20633/ http://umpir.ump.edu.my/id/eprint/20633/ http://umpir.ump.edu.my/id/eprint/20633/1/Time-lapse%20resistivity%20investigation%20of%20salinity%20changes%20at%20an%20ex-promontory%20land.pdf http://umpir.ump.edu.my/id/eprint/20633/2/Time-lapse%20resistivity%20investigation%20of%20salinity%20changes%20at%20an%20ex-promontory%20land1.pdf

id	ump-20633
recordtype	eprints
spelling	ump-206332018-08-03T07:30:59Z http://umpir.ump.edu.my/id/eprint/20633/ Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia M. F., Tajul Baharuddin Samsudin, Taib Roslan, Hashim Mohd Hazreek, Zainal Abidin Mohd Fakhrurrazi, Ishak TA Engineering (General). Civil engineering (General) Time-lapse resistivity measurements and groundwater geochemistry were used to study salinity effect on groundwater aquifer at the ex-promontory-land of Carey Island in Malaysia. Resistivity was measured by ABEM Terrameter SAS4000 and ES10-64 electrode selector. Relationship between earth resistivity and total dissolved solids (TDS) was derived, and with resistivity images, used to identify water types: fresh (ρ e > 6.5 Ω m), brackish (3 Ω m < ρ e < 6.5 Ω m), or saline (ρ e < 3 Ω m). Long-term monitoring of the studied area’s groundwater quality via measurements of its time-lapse resistivity showed salinity changes in the island’s groundwater aquifers not conforming to seawater-freshwater hydraulic gradient. In some aquifers far from the coast, saline water was dominant, while in some others, freshwater 30 m thick showed groundwater potential. Land transformation is believed to have changed the island’s hydrogeology, which receives saltwater pressure all the time, limiting freshwater recharge to the groundwater system. The time-lapse resistivity measurements showed active salinity changes at resistivity-image bottom moving up the image for two seasons’ (wet and dry) conditions. The salinity changes are believed to have been caused by incremental tide passing through highly porous material in the active-salinity-change area. The study’s results were used to plan a strategy for sustainable groundwater exploration of the island. Springer Netherlands 2011-09 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/20633/1/Time-lapse%20resistivity%20investigation%20of%20salinity%20changes%20at%20an%20ex-promontory%20land.pdf pdf en http://umpir.ump.edu.my/id/eprint/20633/2/Time-lapse%20resistivity%20investigation%20of%20salinity%20changes%20at%20an%20ex-promontory%20land1.pdf M. F., Tajul Baharuddin and Samsudin, Taib and Roslan, Hashim and Mohd Hazreek, Zainal Abidin and Mohd Fakhrurrazi, Ishak (2011) Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia. Environmental Monitoring and Assessment, 180 (1-4). pp. 345-369. ISSN 0167-6369 (print); 1573-2959 (online) https://link.springer.com/article/10.1007/s10661-010-1792-x 10.1007/s10661-010-1792-x
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) M. F., Tajul Baharuddin Samsudin, Taib Roslan, Hashim Mohd Hazreek, Zainal Abidin Mohd Fakhrurrazi, Ishak Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia
description	Time-lapse resistivity measurements and groundwater geochemistry were used to study salinity effect on groundwater aquifer at the ex-promontory-land of Carey Island in Malaysia. Resistivity was measured by ABEM Terrameter SAS4000 and ES10-64 electrode selector. Relationship between earth resistivity and total dissolved solids (TDS) was derived, and with resistivity images, used to identify water types: fresh (ρ e > 6.5 Ω m), brackish (3 Ω m < ρ e < 6.5 Ω m), or saline (ρ e < 3 Ω m). Long-term monitoring of the studied area’s groundwater quality via measurements of its time-lapse resistivity showed salinity changes in the island’s groundwater aquifers not conforming to seawater-freshwater hydraulic gradient. In some aquifers far from the coast, saline water was dominant, while in some others, freshwater 30 m thick showed groundwater potential. Land transformation is believed to have changed the island’s hydrogeology, which receives saltwater pressure all the time, limiting freshwater recharge to the groundwater system. The time-lapse resistivity measurements showed active salinity changes at resistivity-image bottom moving up the image for two seasons’ (wet and dry) conditions. The salinity changes are believed to have been caused by incremental tide passing through highly porous material in the active-salinity-change area. The study’s results were used to plan a strategy for sustainable groundwater exploration of the island.
format	Article
author	M. F., Tajul Baharuddin Samsudin, Taib Roslan, Hashim Mohd Hazreek, Zainal Abidin Mohd Fakhrurrazi, Ishak
author_facet	M. F., Tajul Baharuddin Samsudin, Taib Roslan, Hashim Mohd Hazreek, Zainal Abidin Mohd Fakhrurrazi, Ishak
author_sort	M. F., Tajul Baharuddin
title	Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia
title_short	Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia
title_full	Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia
title_fullStr	Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia
title_full_unstemmed	Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia
title_sort	time-lapse resistivity investigation of salinity changes at an ex-promontory land: a case study of carey island, selangor, malaysia
publisher	Springer Netherlands
publishDate	2011
url	http://umpir.ump.edu.my/id/eprint/20633/ http://umpir.ump.edu.my/id/eprint/20633/ http://umpir.ump.edu.my/id/eprint/20633/ http://umpir.ump.edu.my/id/eprint/20633/1/Time-lapse%20resistivity%20investigation%20of%20salinity%20changes%20at%20an%20ex-promontory%20land.pdf http://umpir.ump.edu.my/id/eprint/20633/2/Time-lapse%20resistivity%20investigation%20of%20salinity%20changes%20at%20an%20ex-promontory%20land1.pdf
first_indexed	2023-09-18T22:29:52Z
last_indexed	2023-09-18T22:29:52Z
_version_	1777416213600665600

Time-lapse resistivity investigation of salinity changes at an ex-promontory land: A case study of Carey Island, Selangor, Malaysia

Similar Items