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USGS Water-Year Summary 2024
16031000 Waimea River near Waimea, Kauai, HI
LOCATION - Lat 21°58'49.4", long 159°39'36.3" referenced to North American Datum of 1983, Kauai County, HI, Hydrologic Unit 20070000,
DRAINAGE AREA - 57.63 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.
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1910 to June 1918, July to October 1919, November 1943 to September 1968, October 1969 to September 1972 (discontinued as a continuous-record station, converted to a crest-stage gage partial-record station October 1972 to April 1975), May 1975 to June 1997, July 2016 to current year.
GAGE - Water-stage recorder. datum of gage is 20.0 ft above mean sea level (Department of Water, County of Kauai benchmark). prior to October 5, 1911, non-recording gage at site 1.0 mi downstream at different datum. October 5, 1911 to October 31, 1919, non-recording gage at present site at different datum.
REMARKS - Several upstream diversions for power and irrigation.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of April 19, 1974, which destroyed the station, reached a stage of 19.05 ft, from floodmarks, discharge, 29,100 ft³/s, from rating curve extended above 2,200 ft³/s on basis of slope-area measurement at gage-height 19.05 ft.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 37,100 ft³/s, February 7, 1949, gage-height, 19.3 ft, from rating curve extended above 5,200 ft³/s on basis of slope-area measurements at gage-heights 10.28 ft and 18.7 ft; practically no flow occasionally owing to upstream diversions.
