Response of the Iao Aquifer to Ground-Water Development, Rainfall, and Land-UsePractices between 1940 and 1998, Island of Maui, Hawaii

摘要

Ground water pumped from the Iao aquifer has been used for agricultural purposessince 1948, and domestic purposes since 1955. In 1990, the Hawaii State Commission on Water Resource Management established a value of 20 million gallons per day for the sustainable yield of the aquifer. Water-level data from observation wells throughout the aquifer and information on the depth to and thickness of the transition zone between freshwater and saltwater at the Waiehu deep monitor well indicate that pumping rates near the sustainable yield value of 20 million gallons per day could result in saltwater intrusion in some pumped wells.