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Water Budget for the Lahaina District, Island of Maui, Hawaii

May 1, 1997

Ground-water recharge is estimated as the residual component of a monthly water budget calculated using long-term average rainfall, streamflow, irrigation, pan-evaporation data, and soil characteristics. The water-budget components are defined seasonally, through the use of monthly data, and spatially by topographic and geologic areas, through the use of a geographic information system model.

The long-term average ground-water recharge for the Lahaina District was estimated for three scenarios using 1923-78 land-use and irrigation data, 1986-93 land-use and irrigation data, and natural conditions. The average annual ground-water recharge rate for 1923-78 conditions is 190 million gallons per day, which is 45 percent of the sum of rainfall and irrigation. The recharge rate for 1986-93 conditions is 163 million gallons per day, which is 42 percent of rainfall plus irrigation. The recharge rate for natural conditions is 145 million gallons per day, which is 44 percent of rainfall.

Citation Information

Publication Year 1996
Title Water Budget for the Lahaina District, Island of Maui, Hawaii
DOI 10.3133/wri964238
Authors Patricia J. Shade
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Water-Resources Investigations Report
Series Number 96-4238
Index ID wri964238
Record Source USGS Publications Warehouse
USGS Organization Pacific Islands Water Science Center