USGS Water-Year Summary for Site 255654081350200

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00065 Gage height(Max.,Min.)
	00095 Specific cond at 25C(Mean,Max.,Min.)
	00480 Salinity(Mean,Max.,Min.)
	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

255654081350200 BLACKWATER RIVER NEAR GOODLAND, FL

LOCATION - Lat 25°57'08.5", long 81°35'03.92" referenced to North American Datum of 1983, in sec.11, T.52 S., R.27 E., Collier County, FL, Hydrologic Unit 03090204, Big Cypress Swamp and Southwestern Coastal Area.

DRAINAGE AREA - Indeterminate.

SURFACE-WATER RECORDS

PERIOD OF RECORD - DISCHARGE: May 2007 to September 2008. July 2010 to October 2015. Discontinued. GAGE HEIGHT: May 2007 to September 2008. July 2010 to October 2015. Discontinued.

GAGE - Satellite data collection platform with water quality monitor. Datum of gage is 5.92 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), 1,890 ft³/s Sept. 30, 2015; maximum negative discharge (unfiltered), 2,630 ft³/s Aug. 27, 2012.

GAGE HEIGHT: Maximum gage height, 8.51 ft Aug. 27, 2012; minimum, 1.99 ft Jan. 21, 2008.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SALINITY (TOP):May 2007 to September 2008. May 2010 to September 2011. Discontinued.

SALINITY (BOTTOM):May 2007 to September 2008. July 2010 to current year.

WATER TEMPERATURE (TOP):May 2007 to September 2008. May 2010 to September 2011. Discontinued.

WATER TEMPERATURE (BOTTOM):May 2007 to September 2008. July 2010 to current year.

INSTRUMENTATION - Water-quality monitor.

REMARKS - Salinity and water temperature sensors were located at surface (TOP) and an arbitrary 1.5 ft (BOTTOM). The top probe was removed on Oct. 4, 2011. During periods of missing record, values may have been 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, 42.0 ppt May 26-28, 2008; minimum recorded, 0.6 ppt Sept. 24, 2008.

SALINITY (BOTTOM): Maximum recorded, 42.1 ppt May 28, 2008; minimum recorded, 0.48 ppt Aug. 29, 2017.

WATER TEMPERATURE (TOP): Maximum recorded 34.2 °C Aug. 5, 2007, June 16, 17, Aug. 1, 2010; minimum recorded, 12.1 °C Dec. 16, 2010.

WATER TEMPERATURE (BOTTOM): Maximum recorded 34.4 °C Aug. 7, 2023; minimum recorded, 12.0 °C Dec. 16, 2010.