WRRCTR No.19 Potential Water Development of the Kahua Area, Kohala, Hawaii

Abstract

On the basis of hydrology, geology, soils, and water quality, potential ground-water development along the coastal area of the Kahua area in the North Kohala District appears unfavorable for large supplies of fresh water. Low rainfall and the presence of barrier dikes limit recharge by percolation and underflow. Wells occurring near the coast are brackish and have low heads. A well in the wet uplands is essentially dry. South of the nearby town of Kawaihae ground-water sources of brackish quality are used for irrigation of a golf course and pasturage. Multiple low-yield wells parallel to the coast will maximize yield without further impairing water quality. Surface geophysical exploration and a study of upgrading the water quality economically for domestic use are suggested.