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Water-Year Summary for Site 16522950

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
16522950 Piinaau Str 470 ft US Koolau Ditch, Maui, HI
LOCATION - Lat 20°49'37.91", long 156°10'30.37" referenced to North American Datum of 1983, Maui County, HI, Hydrologic Unit 20020000, 3.3 miles south of the Piinaau Road entrance, 3.8 miles southwest of the Halfway to Hana sign, 9.5 miles southeast of the Garden of Eden Arboretum.
DRAINAGE AREA - 14.8 mi². delineated in StreamStats 6/11/2018.

Basin Characteristic Value Unit
Mean basin elevation 5640 feet
Minimum basin elevation 1010 feet
Maximum basin elevation 10000 feet
Length of longest flow path 12.4 miles
Relief (max elevation - min elevation) 8990 feet
Relative relief (relief divided by perimeter) 301.7 feet per mi
Mean annual precipitation 135 inches
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 2018 to current year.
GAGE - Water-stage recorder and concrete control. Elevation of gage is 1,350 feet above mean sea level (from USGS National Map, August 2019).
REMARKS - No diversion upstream.  Ditch intake 250 ft downstream of control. This is a continuous low-flow station with a maximum reporting limit of 3.09 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Minimum daily discharge, 0.00 ft³/s, on many days; Maximum daily not computed.