USGS Water-Year Summary for Site 02290918

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	Available Parameters
	00010 Temperature, water(Min.,Max.)
	00060 Discharge(Mean)
	00065 Gage height(Min.,Max.)
	00480 Salinity(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

02290918 LOSTMAN'S RIVER BELOW SECOND BAY, FL

LOCATION - Lat 25°33'20", long 81°09'53" referenced to North American Datum of 1983, in T.56 S., R.31 E., Monroe County, FL, Hydrologic Unit 03090202, left bank of Lostman's River between First Bay and Second Bay, 3 mi from the mouth, 22 mi southeast of Chokoloskee Island.

DRAINAGE AREA - Indeterminate.

REVISIONS HISTORY -

WDR FL-2005-2A: 2001-2004. WDR FL-2008-2A: 2001-2007.

Gage height and discharge for the period of Sept. 10, 2017 to Oct. 23, 2017 were revised on Apr. 12, 2018, based on changes to gage datum.

SURFACE-WATER RECORDS

PERIOD OF RECORD -

DISCHARGE: March 2001 to current year.

GAGE HEIGHT: March 2001 to current year.

GAGE - Satellite data collection platform with water-stage vented pressure, and acoustic Doppler velocity meter. Datum of gage North American Vertical datum of 1988 (NAVD 88).

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 to remove principal tidal frequencies from unit values. Positive discharge (ebb tide) is generally to the southwest direction, and negative discharge (flood tide) 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), 25,608 ft³/s Sept. 30, 2022; maximum negative (unfiltered), 70,330 ft³/s Sept. 10, 2017 (Hurricane Irma). See Revision History.

GAGE HEIGHT: Maximum gage height, 4.90 ft Sept. 10, 2017 (Hurricane Irma) Revised; minimum, -2.83 ft Jan. 4, 2008. See Revision History.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SALINITY (TOP): March 2001 to September 2009. Discontinued.

SALINITY (BOTTOM): March 2001 to January 2015. Discontinued.

WATER TEMPERATURE (TOP): March 2001 to September 2009. Discontinued.

WATER TEMPERATURE (BOTTOM): March 2001 to January 2015. Discontinued.

INSTRUMENTATION - Water-quality monitor.

REMARKS - Salinity and water temperature sensors were located at the surface (TOP) in a floating mount and -6.3 ft NAVD88 (BOTTOM). The top probe was removed on Sept. 5, 2009, and the bottom probe was raised to -4.0 ft NAVD88. During periods of missing record, values may be higher or lower than the listed extremes. 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 -

SALINITY (TOP): Maximum recorded, 40.2 ppt Apr. 26, 2001; minimum recorded, 0.3 ppt Oct. 11-13, 2005.

SALINITY (BOTTOM): Maximum recorded, 40.8 ppt Apr. 26, 2001; minimum recorded, 0.3 ppt Oct. 11-13, 2005.

WATER TEMPERATURE (TOP): Maximum recorded 34.2°C Aug.5, 2007; minimum recorded, 12.6°C Jan. 25, 2003, Feb. 29, 2008, Feb. 6, 2009.

WATER TEMPERATURE (BOTTOM): Maximum recorded 34.6°C Aug. 20, 2014; minimum recorded, 7.9°C Jan. 11, 2010.