USGS Water-Year Summary for Site 02313700

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Min.,Max.,Mean)
	00300 Dissolved oxygen(Min.,Max.,Mean)
	00400 pH(Min.,Max.,Med.)
	63160 Stream level, NAVD88(Mean)
	72137 Discharge,tide fltrd(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

02313700 WACCASASSA RIVER NEAR GULF HAMMOCK, FL

LOCATION - Lat 29°12'14", long 82°46'09" referenced to North American Datum of 1927, in SW 1/4 sec.02, T.15 S., R.15 E., Levy County, FL, Hydrologic Unit 03110101, near left bank at abandoned railroad grade, 0.5 mi upstream of Otter Creek, 3.6 mi upstream of mouth, 4 mi southwest of Gulf Hammock.

DRAINAGE AREA - 480 mi².

REVISIONS HISTORY - WSP 2105: 1969. WRD FL-72-1: Drainage area. WRD FL-04-4:2003. Discharge for the period of May 6, 2003 to Oct 24, 2013, was revised on Dec. 7, 2018, based on changes to the stage area and index velocity ratings.

SURFACE-WATER RECORDS

PERIOD OF RECORD - March 1963 to September 1978, November 1980 to September 1984 (fragmentary), October 1984 to September 1992, October 1998 to September 2002, October 2002 to September 2003 (fragmentary), October 2003 to September 2009, October 2009 to current year (filtered).

GAGE - Water-stage recorder, acoustic velocity meter, and data-collection platform. Datum of gage is 10.51 ft below National Geodetic Vertical Datum of 1929 and 11.29 ft below NAVD of 1988. Prior to Nov. 24, 1980, water-stage and deflection-meter recorders at same site at datum 10.00 ft higher.

COOPERATION - This gage is monitored in cooperation with the Suwannee River Water Management District.

REMARKS - Discharge not published some days, due to bad or missing gage-height or velocity data. 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. By convention, the U.S. Geological Survey has established ebb (seaward) flows as positive flow and flood (landward) flows as negative flows. The residuals are not total freshwater flows but are a combination of freshwater flows and water storage caused by higher and lower mean sea levels and storm surges from tropical storm events. Instantaneous discharge computed from index-velocity linear regression relation and gage height rating. Daily values of discharge and gage-height are available online at http://waterdata.usgs.gov/nwis.

Records include flow of Otter Creek. Above bankfull stage, discharge measurements are made along abandoned railroad fill and include all flow from about 1.5 mi northwest to 0.8 mi northeast of gaging station. Drainage Area: Including that of Otter Creek.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: September 2018 to current year.

WATER TEMPERATURE: September 2018 to current year.

DISSOLVED OXYGEN: September 2018 to current year.

pH: September 2018 to current year.

INSTRUMENTATION - Water-quality monitor and data-collection platform.

REMARKS - Extremes for current year and extremes for period of daily record are based on recorded values and may have been exceeded during periods of no record. September 2018 to October 2019, water temperature, specific conductance and dissolved oxygen published as instantaneous maximum and minimum and daily mean; pH published as instantaneous maximum and minimum and daily median.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 47,600 µS/cm @ 25 °C, Nov. 10, 2022; minimum, 43 µS/cm @ 25 °C, Aug. 18, 2019.

WATER TEMPERATURE: Maximum, 32.7 °C, July 4, 2019, Aug. 13, 14, 2023; minimum, 8.9 °C, Jan. 31, 2019.

DISSOLVED OXYGEN: Maximum, 11.4 mg/L, May 24, 2021; minimum, 1.0 mg/L, Sept. 1, 2023.

pH: Maximum, 8.5 std. units, May 22, 2021; minimum, 6.1 std. units, Aug. 20, 2019.