Groundwater extraction-induced land subsidence: a geodetic strain rate study in Kelantan, Malaysia

Yong, Chien Zheng; Denys, Paul; Pearson, Christopher

doi:10.1080/14498596.2018.1429329

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…The negatives impact of groundwater over-exploitation is saline intrusion, streamflow depletion and land subsidence [17]. From previous research [18] its shows that Kelantan is having land subsidence with precisions of 0.12 -0.17 mm/year due to over-extractions of groundwater. In northeast Kelantan, saltwater intrusion is the most significant threat to the aquifer.…”

Section: Groundwater Over-exploitationmentioning

confidence: 94%

Overview of issues, challenge, and potential ground water extraction for Kelantan people.

Noh,

Asfar,

Rahim

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Clean water is a vital element in humankind’s ecosystem for sustainability of living on earth. Limitation of surface water in Kelantan leads toward ground water extraction as an alternative for water supply. However, there are issues and challenges with the current practice including water quality index (WQI), pollution and monitoring of capacity extraction for ground water. Thus, the objective of this paper is to summary the current scenario of ground water extraction in Kelantan. Hence, identify the potential problems that occur based on current practice and look forward for potential ground water extraction in Kelantan in future. This finding is extracted from previous study done by other researchers, or any electronic media related to the objective of the paper. Due to limited source of indexed paper, Google, official related agencies website and ResearchGate are being adopted as main platforms for search engines for data and literature needed. It is hoped that these findings would be able to help authority and relevant parties to improve the framework and government policy for groundwater extraction in Kelantan. It is also viewed to help Kelantanese to have better ground water supply as stipulated by Ministry of Health.

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Section: Groundwater Over-exploitationmentioning

confidence: 94%

Overview of issues, challenge, and potential ground water extraction for Kelantan people.

Noh,

Asfar,

Rahim

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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show abstract

“…The use of groundwater is still common among Malaysians, especially at east coast of peninsular Malaysia, Kelantan and about 38% of the population in the State of Kelantan use groundwater for consumption (Ayob et al, 2022). Residents in the northern part of Kelantan are taking advantage of the aquifer for consuming groundwater at a high rate (4.22±0.17 mm/year) (Yong et al, 2018). The rapid growth of the population and accelerated urbanization raises demand for groundwater consumption.…”

Section: Introductionmentioning

confidence: 99%

Turbidity Reduction of Groundwater by Using Nanomagnetic Adsorbent Composite (NMAC): Process Optimization by 3k Factorial Design and Analysis

2022

Global NEST: The International Journal

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<p>The widespread use of alternative water sources in Kelantan encourages the development of cost-effective methods for the purification of water. A simple and straightforward adsorption process using a nanomagnetic adsorption composite (NMAC) was introduced in this study as a new adsorbent for the treatment of turbid polluted groundwater. The use of iron oxide nano-coated adsorbents (NMACs) showed a high porosity relative to commercial activated carbons (CACs). Analysis of X-ray diffraction analysis for NMAC is confirmed by a crystal framework for Fe2O3, Fe3O4, and FeO are cubic components. A 3k maximum factor configuration of four factors, i.e., adsorbent dosage (0.02, 0.04, and 0.06 g), agitation time (15, 30, and 60 min), rotation speed (150, 200, and 250 rpm) and adsorbent scale (< 45 μm and > 300 μm) were used. The turbidity removal capability of both NMAC and CAC was compared. The adequacy of the developed empirical model for the elimination of turbidity and maximum turbidity efficiency was determined by regression model analysis. The obtained results revealed regression values of NMAC (R2; 0.9903, R2 adj.; 0.9875, R2 pred; 0.9808) and CAC (R2; 0.9909, R2 adj.; 0.9981, R2 pred.; 0.9817). The analysis of variance and surface response methodology revealed that turbidity removal efficiency of NMAC is affected by the four factors investigated. Among the samples, 0.04 g NMAC (< 45 μm) agitated at 150 rpm for 48 min showed 98.76% maximum adsorption efficiency. The findings showed that NMAC is a strong adsorbent for use in the treatment of raw water.</p>

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“…Studies have used geodetic leveling and Global Positioning System (GPS) to detect land subsidence [ 4 , 5 ]. However, the field survey-based methods were labor-intensive and time-consuming, and thus they would be inefficient for monitoring land subsidence and its spatial distributions in large areas [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Regional-scale monitoring of underwater and dry ground subsidence in high phreatic areas of North China Plain

et al. 2020

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Land subsidence monitoring provides information required when developing land use plans and allows for proactive management of subsidence issues. However, it has been challenging to accurately detect land subsidence areas, especially those under waterbodies. This study evaluated the applicability of integrated use of the optical Landsat-8 OLI and microwave Sentinel-1A TOPSAR imagery to delineate subsidence areas and quantify subsidence rates in a typical coal mining area of North China Plain. An Enhanced Modified Normalized Difference Water Index (E-MNDWI) was combined with Short BAseline Subset-Interferometric Synthetic Aperture Radar (SBAS-InSAR) image to monitor underwater and dry ground subsidence. The results demonstrated that the method could delineate underwater and dry ground subsidence and quantify its rates accurately. The proposed method estimated subsidence area corresponded to 34.8% (16.7 km 2 ) of the study area. The size of underwater subsidence areas was substantial and accounted for 43.7% of the subsidence areas. Seasonal underwater subsidence areas were generally distributed in the vicinity of perennial ones. Dry ground subsidence covered 9.4 km 2 of the study area and generally occurred in urban and rural residential areas with the maximum subsidence of up to 80.1 mm/year. This study demonstrates the efficiency and capacity of integrating optical and microwave images to monitor the subsidence progresses, which thus can help develop effective rehabilitation policy and strategy to mitigate the impacts of land subsidence.

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Groundwater extraction-induced land subsidence: a geodetic strain rate study in Kelantan, Malaysia

Cited by 8 publications

References 22 publications

Overview of issues, challenge, and potential ground water extraction for Kelantan people.

Overview of issues, challenge, and potential ground water extraction for Kelantan people.

Turbidity Reduction of Groundwater by Using Nanomagnetic Adsorbent Composite (NMAC): Process Optimization by 3k Factorial Design and Analysis

Regional-scale monitoring of underwater and dry ground subsidence in high phreatic areas of North China Plain

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