USGS Water-Year Summary for Site 16130000

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	00060 Discharge(Mean)

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

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USGS Water-Year Summary 2023

16130000 Nahomalu Valley near Mana, Kauai, HI

LOCATION - Lat 22°02'29.6", long 159°45'06.9" referenced to North American Datum of 1983, Kauai County, HI, Hydrologic Unit 20070000, on left bank 1.1 miles northeast of Mana and 5.3 miles northwest of Kekaha School.

DRAINAGE AREA - 3.79 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: Drainage Area. Peak discharge values for water years 2015, 2016, and 2017 were revised on August 14, 2019.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Crest-stage gage from 1962-63, Operated as a continuous surface water gage from 1964-71, and crest-stage gage from 1972 to 2009, 2011 to current year.

GAGE - Crest-stage gage. Datum of gage is 236.8 feet above mean sea level (by U.S.G.S. stadia survey, 1963).

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 and gage height, 2,120 ft³/s, 7.15 feet, April 15, 1972.