1996 Volume 40 Pages 51-56
Groundwater development in small islands often requires management to prevent sea water intrusion into coastal aquifers. In this paper, therefore, a two-dimensional fresh and salt water flow model is studied to increase irrigation water supply to a sugar cane field. Both the groundwater flow rate across the area of a planned subsurface dam and the movement of immiscible fresh-salt water interface are predicted by the present model. A preliminary evaluation for a feasible groundwater development is attempted. The groundwater flow rate across the dam site to the sea is predicted as about 329×103 m3/year for the precipitation 1267mm in 1991, which is 73% of the average annual precipitation of 1734mm.
