USGS Water-Year Summary for Site 255432081303900

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	00065 Gage height(Max.,Min.)
	00095 Specific cond at 25C(Mean,Min.,Max.)
	00480 Salinity(Mean,Max.,Min.)
	63160 Stream level, NAVD88(Min.,Max.)
	72137 Discharge,tide fltrd(Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

255432081303900 FAKA UNION RIVER NEAR THE MOUTH, FL

LOCATION - Lat 25°54'31.7", long 81°30'39.3" referenced to North American Datum of 1983, Collier County, FL, Hydrologic Unit 03090204, located on the right bank, 0.5 mi from the mouth, 3.3 mi south of the Port of the Islands Marina.

DRAINAGE AREA - Indeterminate

SURFACE-WATER RECORDS

PERIOD OF RECORD -

DISCHARGE: May 2006 to September 2008. May 2010 to current year.

GAGE HEIGHT: May 2006 to September 2008. May 2010 to current year.

GAGE - Satellite data collection platform with water-stage encoder, acoustic stage sensor, and acoustic Doppler velocity meter. Datum of gage is 7.67 ft above North American Vertical Datum of 1988.

REMARKS - Streamflow at this site is significantly affected by astronomical tides. Daily mean discharge was computed from filtered unit value discharge data. The Godin low-pass filter was used to remove principal tidal frequencies from unit values. Positive discharge is generally to the southwest and negative discharge to the northeast. Discharge and gage height data are available in files of the U.S. Geological Survey and online at http://waterdata.usgs.gov/nwis.

EXTREMES FOR PERIOD OF RECORD -

DISCHARGE: Maximum positive discharge (unfiltered), 5,831 CFS Sept. 26, 2022; maximum negative discharge (unfiltered), 12,328 CFS Sept. 28, 2022.

GAGE HEIGHT: Maximum gage height, 14.48 ft Sept. 10, 2017 (debris line from Hurricane Irma, accuracy > 0.4 ft); minimum, 4.05 ft Jan. 3, 2008.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SALINITY (TOP): May 2006 to September 2008. May 2010 to September 2011. Discontinued.

SALINITY (BOTTOM): May 2006 to September 2008. May 2010 to current year.

WATER TEMPERATURE (TOP): May 2006 to September 2008. May 2010 to September 2011. Discontinued.

WATER TEMPERATURE (BOTTOM): May 2006 to September 2008. May 2010 to current year.

INSTRUMENTATION - Water quality monitor.

REMARKS - Salinity and water temperature sensors were located at surface (TOP) and an arbitrary 2.5 ft (BOTTOM). The top probe was removed on Oct. 4, 2011. During periods of missing record, values may be higher or lower than the listed extremes. Salinity and water temperature data are available in files of the U.S. Geological Survey and online at http://waterdata.usgs.gov/nwis.

EXTREMES FOR PERIOD OF RECORD -

SALINITY (TOP): Maximum recorded, 40.9 ppt May 27, 28, 2008; minimum recorded, 0.2 ppt on many days in Sept. 2006.

SALINITY (BOTTOM): Maximum recorded, 41.6 ppt June 12, 2008; minimum recorded, 0.2 ppt on many days in Sept. 2006, Aug., Sept, Oct. 2017.

WATER TEMPERATURE (TOP): Maximum recorded, 34.2 °C June 16, Aug. 1, 2010; minimum recorded, 11.6 °C Dec. 15, 2010.

WATER TEMPERATURE (BOTTOM): Maximum recorded, 34.3 °C June 24, 2019; minimum recorded, 11.5 °C Dec. 15, 2010.