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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
16212490 Honouliuli Stream at H-1 Freeway near Waipahu, Oahu, HI
LOCATION - Lat 21°22'41.3", long 158°02'41.2" referenced to North American Datum of 1983, Honolulu County, HI, Hydrologic Unit 20060000, on right bank 300 feet upstream from H-1 Freeway bridge, 0.9 miles west of Kunia Road, and 1.3 miles west of Waipahu Post Office.
DRAINAGE AREA - 10.6 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.
REVISIONS HISTORY - Discharge values from April 12, 2017 to May 21, 2018 were revised on October 22, 2018. Discharge values from May 21, 2018 to July 13, 2018 were revised on June 12, 2019. Suspended Sediment Concentrations were revised from May 3 to May 4, 2016, March 23, 2017, June 15, 2017, and June 6, 2019 on September 16, 2020.
SURFACE-WATER RECORDS
PERIOD OF RECORD - November 2012 to current year.
GAGE - Water-stage recorder. Elevation of gage is 145 feet above mean sea level (from 10-meter National Elevation Dataset digital elevation model).
REMARKS - Diversions upstream.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge and gage height, 765 ft³/s, 9.03 ft., February 20, 2023.
WATER-QUALITY RECORDS
PERIOD OF RECORD - November 2012 to September 2021.
PERIOD OF DAILY RECORD - November 2012 to September 2021.
INSTRUMENTATION - Automatic pumping sediment sampler November 2012 to September 2021.
EXTREMES FOR PERIOD OF RECORD - SUSPENDED-SEDIMENT CONCENTRATION: maximum daily mean, 3,210 mg/L, August 24, 2016; minimum daily, 0 mg/L, on many days. SUSPENDED-SEDIMENT DISCHARGE: maximum daily, 774 tons, August 26, 2015.
