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USGS Water-Year Summary 2024
16647000 Ukumehame Gulch nr Olowalu, Maui, HI
LOCATION - Lat 20°49'09.3", long 156°35'00.6" referenced to North American Datum of 1983, Maui County, HI, Hydrologic Unit 20020000, 0.5 mi upstream from the Ukumehame Gulch diversion intake, 0.68 mi northeast of the Ukumehame Reservoirs, 1.4 mi southeast of Olowalu Stream diversion intake, and 2 mi northwest of Ukumehame Beach State Park.
DRAINAGE AREA - 3.71 mi². delineated in StreamStats 6/11/2018.
| Basin Characteristic | Value | Unit |
| Mean basin elevation | 2270 | feet |
| Minimum basin elevation | 415 | feet |
| Maximum basin elevation | 4610 | feet |
| Length of longest flow path | 3.33 | miles |
| Relief (max elevation - min elevation) | 4200 | feet |
| Relative relief (relief divided by perimeter) | 403 | feet per mi |
| Mean annual precipitation | 83.8 | inches |
REVISIONS HISTORY - Instantaneous gage height and discharge data were revised for June 29, 2018, and discharge data was revised September 20, 2018 on July 11, 2019.
SURFACE-WATER RECORDS
PERIOD OF RECORD - 1911-1912, 1913-1919, April 2018 to current year.
GAGE - Water-stage recorder and concrete control. Elevation of gage is 400 feet above mean sea level (from USGS National Map, August 2019).
REMARKS - This is a continuous low-flow station with a maximum reporting limit of 40 ft³/s from April 2018 to current year. No diversions upstream.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 156 ft³/s, July 28 and 29, 1914; minimum daily, 2.8 ft³/s, on December 9, 1919.
