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Groundwater development and effectiveness of subsurface dams in islands and coastal lowlands

Nguyen Cao Don, Nguyen Dinh Thanh, Nguyen Thi Minh Hang

Abstract



Conserving groundwater resource requires the construction of a dam to increase the amount of water resources while also preventing seawater intrusion. In this paper, we simulate groundwater flow regime in a combination with a subsurface dam on an island designed to ensure a proper utilization of groundwater resources. The results of this study indicate that the construction of a subsurface dam has a possibility by means of which the availability of water resources can be increased and prevent seawater intrusion. The subsurface dam constructed in Phuket of Thailand would increase 2.5 m of groundwater heads and significantly increase 57.5% of groundwater yield without causing seawater intrusion.

Keywords


Coastal lowland plain, island, groundwater model, salinity intrusion, subsurface dam.

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