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    USGS 02244040 ST. JOHNS R AT BUFFALO BLUFF NEAR SATSUMA, FL

    PROVISIONAL DATA SUBJECT TO REVISION

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    This gage is monitored in cooperation with the St. Johns River Water Management District.

    Link to the St. Johns River Water Management District.

    Data are tidally affected -- Astronomical tides cause significant cycles of approximately 24.84 hours at this site. Because a different portion of the 24.84-hour tidal cycle is averaged in successive daily (24-hour) computations, a systematic secondary oscillation, unrelated to basin hydrology and having a period of about two weeks may be apparent in daily data.

    LOCATION.--Lat 29°35'46", long 81°41'00", referenced to North American Datum of 1927, in SE 1/4 sec.27, T.10 S., R.26 E., Putnam County, FL, Hydrologic Unit 03080103, near left bank, 400 ft upstream from CSX Transportation bridge, 2.4 mi downstream from Cross-Florida Barge Canal, 3.2 mi northwest of Satsuma, and 89 mi upstream from mouth.

    DRAINAGE AREA.--6,580 mi2, approximately. Includes Paynes Prairie, a diked sinkhole area of about 650 mi2, which is noncontributing.

    PERIOD OF RECORD.--September 1943 to July 1948 (gage heights only), October 1992 to September 2010, October 2010 to current year (filtered).

    GAGE.--Water-stage recorder, acoustic velocity meter, water-quality monitor, and data-collection platform. Datum of gage is 10.00 ft below NGVD of 1929 and 10.93 ft below NAVD of 1988. Prior to Oct. 1, 1996 at datum 1.00 ft lower.

    Available Parameters Period of Record
    All 9 Available Parameters for this site
      
    00065 Gage height(Mean) 1990-10-01  2014-08-19
    00045 Precipitation(Sum) 1995-06-07  2004-05-18
    00300 Dissolved oxygen(Mean,Max.,Min.) 1998-10-01  2014-08-19
    00010 Temperature, water(Mean,Max.,Min.) 1995-04-29  2014-08-19
    00095 Specific cond at 25C(Mean,Max.,Min.) 1995-04-29  2014-08-19
    00060 Discharge(Mean) 1992-10-02  2014-08-19
    63680 Turbidity, Form Neph(Mean) 2005-10-01  2011-02-14
    72137 Discharge,tide fltrd(Mean) 1993-10-03  2014-06-02
    63160 Stream level, NAVD(Mean) 2010-10-01  2014-08-19

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