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Title: Optimization of pumping rate and recharge through numerical modeling with special reference to small coral island aquifer
Authors: Banerjee, Pallavi
Singh V.S.
Published in: Physics and Chemistry of the Earth
Abstract: The groundwater is the only source of availability of fresh water in tiny coral islands. In the past decades, there has been growing demand for fresh water to meet the need of domestic besides other purposes. The aquifer system on these islands is fragile besides being subjected to various stresses like high subsurface discharge, increased abstraction, improper disposal of waste water and tidal waves of ocean all of which subject the aquifer prone to sea water intrusion and thus reduction and deterioration the water quality. Therefore, understanding the aquifer's behavior and then work out a sustainable option for fresh water is essential. The paper concerns optimizing of pumping and artificial recharge paces to reduce the effects of various stresses over tiny and fragile lens-shaped coral island aquifer system. The density driven ground water flow was simulated using SEAWAT (MODFLOW and MT3D based computer program) model. Detailed hydrogeological investigations were carried out to determine the quantity of freshwater that could be pumped to avoid the seawater intrusion into the aquifer through modeling. Initial heads, physical parameters and boundary conditions of the study area have been defined in the model based on field data, geophysical measurements and interpretations and hydrogeological studies. The model was calibrated by obtaining a match of computed and observed values of the water table, as hydraulic head is much more sensitive to pumping rates than any other stress. A few sentences about: flow model were utilized to derive optimal pumping rate; the effect of artificial recharge through the model, has also proved that the salt-water intrusion could be stopped by raising the water level through temporarily storing the artificially recharged water post construction of subsurface dam near the coast. © 2011 Elsevier Ltd.
Citation: Physics and Chemistry of the Earth (2011), 36(16): 1363-1372
Issue Date: 2011
Keywords: Artificial recharge
Coral island aquifer
Numerical model
Optimal pumping rate
Seawater intrusion
ISSN: 14747065
Author Scopus IDs: 24480592700
Author Affiliations: Banerjee, P., National Geophysical Research Institute (CSIR), Uppal Road, Hyderabad 500 007, India
Singh, V.S., National Geophysical Research Institute (CSIR), Uppal Road, Hyderabad 500 007, India
Corresponding Author: Banerjee, P.; NGRI, Groundwater Building, Uppal Road, Andhra Pradesh, India; email:
Appears in Collections:Journal Publications [ES]

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