USGS Water-Year Summary for Site 16247900

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	Available Parameters
	00060 Discharge(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

16247900 Kuliouou Valley at Kuliouou, Oahu, HI

LOCATION - Lat 21°17'36.1", long 157°43'23.8" referenced to North American Datum of 1983, Honolulu County, HI, Hydrologic Unit 20060000, (Koko Head quadrangle, 1969, 1:24,000), on both banks of concrete lined flood control channel at Kuliouou, 300 ft. below single-lane bridge, 400 ft. upstream of Haleloa Place bridge, and 0.6 mi above Highway 72.

DRAINAGE AREA - 1.27 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 - WDR HI-10-1: 2009, Drainage Area. Peak gage height for water year 2016 revised on January 20, 2021.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Annual peak discharge, 1958-1959, 1970-2005, 2008-2010, 2012 to current year. Daily discharge from June 2009 to September 2010.

GAGE - Crest Stage Gage. Elevation of gage is 20 ft above mean sea level (from topographic map).

REMARKS - As the number of streams on which streamflow information is likely to be desired far exceeds the number of stream-gaging stations feasible to operate at one time, the U.S. Geological Survey collects limited streamflow data at sites other than stream-gaging stations. When limited streamflow data are collected on a systematic basis over a period of years for use in hydrologic analyses, the site at which the data are collected is called a partial-record station. Data collected at these partial-record stations are usable in low- or flood-flow analyses, depending on the type of data collected. Prior to 1973, crest-stage partial-record station records for the State of Hawaii were published in an annual progress report entitled An Investigation of Floods in Hawaii. The following table contains the annual maximum discharge for this station. A crest-stage station is a device which will register the peak stage occurring between inspections of the gage. A stage-discharge relation for each gage is developed from discharge measurements made by indirect measurements of peak flow or by current meter. The date of the maximum discharge is not always certain but is usually determined by comparison with nearby continuous-record stations, weather records, or local inquiry. Only the maximum discharge for the current year is given. Information on some lower floods may have been obtained but is not published here. The years given in the period of record represent water years for which the annual maximum has been obtained.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,700 ft³/s, December 31, 1987, gage-height, 36.55 ft; no flow on many days.

WATER-QUALITY RECORDS

PERIOD OF RECORD - June 2009 to September 2010. (Discontinued)

PERIOD OF DAILY RECORD - SUSPENDED-SEDIMENT DISCHARGE: October 2007 to September 2010. (Discontinued October 2010)

EXTREMES FOR PERIOD OF RECORD - SUSPENDED SEDIMENT CONCENTRATION: Maximum daily mean, 127 mg/L (estimated), November 25, 2009; minimum, 0 mg/L on many days. SUSPENDED SEDIMENT DISCHARGE: Maximum daily, 6.2 tons (estimated), November 25, 2009; minimum, 0 tons on many days.