Water Budget and the Effects of Land-Use Changes on Ground-Water Recharge, Oahu,Hawaii

摘要

The purpose of this report is to describe the calculation of a predevelopment anda mid-1980's water budget for five major study areas of the island of Oahu, and the spatial distribution and temporal change in ground-water recharge caused by changes in land use. The calculation of water budgets and display of the resulting recharge distributions were aided by the use of a geographic information system (GIS) that combines spatial and numerical data for a particular area in a digital form. As a result, each location on a map has various attribute data--precipitation, ground-water recharge, and geologic unit--characterizing it. The water budgets for the individual areas are combined into a water budget for the entire island.