USGS Water-Year Summary 2024

16049000 Hanapepe River below Manuahi Stream near Eleele, Kauai, HI

LOCATION - Lat 21°57'17.7", long 159°33'02.8" referenced to North American Datum of 1983, Kauai County, HI, Hydrologic Unit 20070000, on left bank 200 ft downstream from Manuahi Stream and 4.0 mi northeast of Eleele.

DRAINAGE AREA - 18.46 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 - WSP 740: 1931. WSP 1719: 1929-31(M). WSP 1937: 1918, 1919(M), 1920, 1921(M), 1927-28(M), 1930, 1936-37(M), 1941(P), 1943-46(P), 1947(M), 1948-52(P), 1955(M), 1956-57(P), 1958(M), 1960(M). WSP 2137: Drainage Area. WDR HI-10-1: Drainage Area, 2016: Unit-values and Daily Discharges, WDR-2016. Estimated qualifiers were removed from January 29, 2020 to February 19, 2020 February 26, 2020 to July 7, 2020 on December 3, 2020.

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1917 to January 1921, December 1926 to current year. Prior to July 1952, published as "at Koula, near Eleele." Records for August 1910 to December 1916 at site 0.5 mi upstream not equivalent owing to intervening inflow.

GAGE - Water-stage recorder. Datum of gage is 222 ft above mean sea level (by stadia survey). July 1, 1917 to January 22, 1921, non-recording gage and December 16, 1926, to June 30, 1951, water-stage recorder, at same site at datum 1.00 ft higher.

REMARKS - Koula ditch diverts water 3.0 mi upstream of station for irrigation in vicinity of Makaweli.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 39,000 ft³/s, April 15, 1963, gage height, 14.87 ft, from rating curve extended above 7,600 ft³/s on basis of slope-area measurement of peak flow; minimum, 5.1 ft³/s, May 21, 1954.