Groundwater resources assessment using numerical model: A case study in low-lying coastal area

Praveena, Sarva Man­gala; Aris, Ahmad Zaharin

doi:10.1007/bf03326125

Cited by 34 publications

(13 citation statements)

References 28 publications

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“…The quality of groundwater in coastal aquifers deteriorate as a result of the over pumping of water that was previously discharged in to the sea (Gallardo and Marui, 2007). This problem is common in coastal areas throughout the world and the same has been reported by many researchers (Apello et al, 1987;Gnanasundar and Elango, 1999;Bakker, 2000;Shammas and Jacks, 2007;Chenini and Khemiri, 2009;Praveena and Aris, 2010). The intrusion of seawater has been identified by many approaches such as isotope studies (Yechieli and Sivan, 2008), geochemical and geophysical studies (Melloul and Goldenberg, 1997;Gnanasundar and Elango, 1999;Ibrahim et al, 2003;Di Sipio et al, 2006;Aris et al, 2007;Cimino et al, 2008).…”

Section: Introductionmentioning

confidence: 79%

Assessment of seawater mixing in a coastal aquifer by high resolution electrical resistivity tomography

Sathish

Elango

Rajesh

et al. 2011

Int. J. Environ. Sci. Technol.

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Seawater intrusion is a major problem in urbanized coastal regions of India which is due to over exploitation of groundwater for various purposes. This study was carried out with the objective of assessing the zone of mixing between seawater and groundwater in the coastal aquifer in south of Chennai, Tamil Nadu, India using high resolution electrical resistivity tomography. High resolution electrical resistivity tomography was carried out in five profiles perpendicular to the sea using IRIS make SYSCAL Pro-96 system with 2.5 m or 5 m inter-electrode separation. The maximum length of the profile was 170 m which resulted in a depth of investigation of 28.7 m. The apparent resistivity measured in this area varies from 0.3 ohm-m to 30,000 ohm-m. The apparent resistivity of saturated zone decreases towards the sea, indicating the influence of seawater. This was also confirmed by measuring the electrical conductivity of groundwater, which gradually increases from 156 µS/cm to 3430 µS/cm towards the sea. Further, the concentration profiles of electrical conductivity, sodium, chloride and chloride / bicarbonate ratio are compared with the high resolution electrical resistivity tomography profile. The distance of influence of seawater is comparatively high in northern part than in southern part of the area. The high resolution electrical resistivity tomography was effectively used to determine the effect of seawater mixing with groundwater.

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Section: Introductionmentioning

confidence: 79%

Assessment of seawater mixing in a coastal aquifer by high resolution electrical resistivity tomography

Sathish

Elango

Rajesh

et al. 2011

Int. J. Environ. Sci. Technol.

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“…The Seawat code is used to simulate the groundwater flow and density-dependent solute transport simultaneously. Examples of density-dependent computer code applications in seawater intrusion are described in Ma et al (1997), Oude Essink (2001), Langevin (2003), Kashaigili et al (2003), Rao et al (2004Rao et al ( , 2005, Dausman and Langevin (2005), Langevin et al (2005), Mao et al (2006), Giambastiani et al (2007), Awwad et al (2008), Praveena and Aris (2010) and El-Bihery (2009).…”

Section: Introductionmentioning

confidence: 98%

Assessment of seawater intrusion in Langat basin, Malaysia

Nusari¹,

Soom²,

Mohammad³

et al. 2013

Proceedings of the Institution of Civil Engineers - Water Manag

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Seawater intrusion is threatening freshwater resources in coastal regions worldwide. Modelling this phenomenon can help in the management and control of such problems. This study presents a numerical model of seawater intrusion in a semi-confined aquifer in the lowland area of the Langat basin, Selangor, Malaysia, where groundwater is the only source of water supply for mega industrial projects. To provide useful measures for protecting groundwater from pollution by seawater intrusion, a three-dimensional numerical model, Seawat-2000, was applied.The numerical model incorporates regional geological, geographical, and hydrogeological features. The input parameters to the model were determined from well logs, well drillers' reports, and pumping tests. After the model was calibrated using data for the year 2010, the model was used to predict the extent of seawater intrusion for the future (2011-2045) assuming that the current condition of the Langat basin remains unchanged. The results show that the aquifer in the study area will be significantly influenced by seawater intrusion for the next 35 years.

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“…This leads to aggressive saltwater intrusion from the sea contaminating inland fresh water aquifers to a large extent which may take several years to get remediated [2]. The impact of climate change such as recharge rate and human pressure pumping rate on freshwater/groundwater have been controlling the shape and thickness of the freshwater lens [3]. To address this issue effectively, density dependent groundwater model is required to track the movement of the solute in coastal aquifers [4].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Saltwater Intrusion in Coastal Aquifer of Kg. Salang, Tioman Island, Pahang, Malaysia

Idris¹,

Aris²,

Narany³

et al. 2017

MATEC Web Conf.

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Abstract. Numerical models are capable of simulating various groundwater scenarios and relate it towards groundwater management. A mesh based density dependent flow model, FEFLOW is used to simulate groundwater flow and transport for a coastal island aquifer in Kg. Salang, Tioman Island, Malaysia. FEFLOW is designed to simulate 2D and 3D, variable density groundwater flow and multi-species transport. The impacts of pumping and recharge rates represented by three different groundwater scenarios, which were investigated by means of hydraulic heads, TDS concentrations and water balance components. Scenario A showed the standard saturated groundwater flow and the steady state fluid flow. Over pumping and inconsistency in recharge rate are the stresses shown in Scenarios B and C. Scenario B involved in the maximum pumping rate of 96m 3 per day and recharge rate of 300mm per year has shown a drawdown of 1.5 m. Scenario C showed the extreme pumping rate of 1000m 3 per day and without recharge has shown a decrease in groundwater levels of 6.3 m.and groundwater storage (50%). Scenario B presented the most promising finding compared with Scenario C. Highest hydraulic heads, lowest mass concentration and positive groundwater storage (2578.6m 3 /day) were obtained in Scenario B. Additionally, and further progress is needed in obtaining the water usage data from each part to determine the best pumping rate. A sustainable groundwater management plan is crucial to maintain the natural resources and social benefits as well as to protect the ecological balance.

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Groundwater resources assessment using numerical model: A case study in low-lying coastal area

Cited by 34 publications

References 28 publications

Assessment of seawater mixing in a coastal aquifer by high resolution electrical resistivity tomography

Assessment of seawater mixing in a coastal aquifer by high resolution electrical resistivity tomography

Assessment of seawater intrusion in Langat basin, Malaysia

Simulation of Saltwater Intrusion in Coastal Aquifer of Kg. Salang, Tioman Island, Pahang, Malaysia

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