Abstract
Groundwater on a small coral island occurs in the form of a lens floating on saline water. The freshwater lens is highly sensitive to various stresses such as pumping, sea tide, etc. Since groundwater is the only source of freshwater on the island, it is not only being utilized for various purposes but also there is growing demand for increased pumpage. In order to assess the impact of additional groundwater pumpage, various hydrogeological parameters were obtained through detailed investigations. These parameters were then used to construct a two-dimensional solute transport model and the effect of additional groundwater pumpage on quality of groundwater was studied. The model helps in arriving at a safe groundwater pumping scheme. Feasibility of groundwater augmentation by constructing a subsurface dam has also been demonstrated.
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