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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
16717700 Hakalau Stream nr alt 1300 ft, HI
LOCATION - Lat 19°52'18.12", long 155°10'00.54" referenced to North American Datum of 1983, Hawaii County, HI, Hydrologic Unit 20010000, 1.5 mi NW of Akaka Falls State Park, 2.95 mi SW of Hakalau Beach Park, 3.00 mi W of Honomu town.
DRAINAGE AREA - 1.75 mi². From automated delineation using 10-meter National Elevation Dataset digital elevation model data dated September 2006 and Watershed Boundary Dataset dated May 2008, using UTM Zone 4 projection, NAD 83 horizontal datum.
| Basin Characteristic | Value | Unit |
| Mean basin elevation | 2760 | feet |
| Minimum basin elevation | 1310 | feet |
| Maximum basin elevation | 4060 | feet |
| Length of longest flow path | 6.87 | miles |
| Relief (max elevation - min elevation) | 2750 | feet |
| Relative relief (relief divided by perimeter) | 161 | feet per mi |
| Mean annual precipitation | 199 | inches |
REVISIONS HISTORY - Instantaneous discharge data was revised from October 31, 2018 to June 10, 2019 on July 16, 2019; and from September 15 to October 20, 2019 on June 16, 2020.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2018 to current year.
GAGE - Water-stage recorder and natural control. Elevation of gage is 1,300 feet above mean sea level (from USGS National Map, August 2019).
REMARKS - No diversions upstream. This is a continuous low-flow station with a maximum reporting limit of 26 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Minimum daily discharge, 0.08 ft³/s, on several days; maximum not determined.
