USGS Water-Year Summary 2020
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.
- WDR HI-10-1: Drainage Area. Peak discharge values for water years 2015, 2016, and 2017 were revised on August 14, 2019.
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).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge and gage height, 2,120 ft³/s, 7.15 feet, April 15, 1972.