Reassessment of Ground-Water Recharge and Simulated Ground-Water Availability for the Hawi Area of North Kohala, Hawaii

摘要

The purpose of this report is to describe the (1) calculation of a daily water budget to estimate average annual ground-water recharge for 1990's land-use conditions in the Hawi area of the island of Hawaii, (2) uncertainty in the recharge estimate, and (3) results from numerical ground-water flow models that simulate the hydrologic effects of additional ground-water withdrawals at rates between 10 and 20 million gallons per day (Mgal/d) above average 1990's rates. No new data were collected as part of this study; only existing information was used to compute the water budget. An exist-ing numerical ground-water flow model (Underwood and others, 1995) formed the basis for models used in this study to simulate the effects of additional withdrawals.