USGS Water-Year Summary 2023
02198840 SAVANNAH RIVER NEAR PORT WENTWORTH, GA
LOCATION - Lat 32°14'07.7", long 81°09'03.9" referenced to North American Datum of 1983, Effingham County, GA, Hydrologic Unit 03060109, at right downstream fender of Interstate 95 bridge, 1.0 mile downstream from Abercorn Creek, and 6.1 miles north of Port Wentworth.
DRAINAGE AREA - Indeterminate.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: January 2014 to current year.
GAGE HEIGHT: October 1986 to current year.
WATER VELOCITY: January 2014 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 0.00 feet referenced to National Geodetic Vertical Datum (NAVD) of 1988 (leveling by Global Positioning System equipment). Prior to October 1, 2006, datum of gage was 0.00 feet above National Geodetic Vertical Datum (NGVD) of 1929 (levels by U.S. Army Corps of Engineers).
COOPERATION - City of Savannah.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 57,500 cfs, March 9, 2020; maximum gage height recorded, 6.98 feet, September 11, 2017; minimum gage height recorded, -5.80 feet, January 9, 2009.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - October 2002 to current year.
INSTRUMENTATION - Tipping-bucket raingage.
WATER-QUALITY RECORDS
PERIOD OF RECORD - October 2008 to November 2010.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: October 1987 to current year.
WATER TEMPERATURE: October 1999 to current year.
SALINITY: October 2011 to current year.
pH: August 2013 to current year.
TURBIDITY: August 2013 to current year.
DISSOLVED OXYGEN: August 2013 to current year.
INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded: 18,200 microsiemens, October 8, 2016; minimum recorded: 30 microsiemens, August 26, 1995, May 05, 1996.
pH: Maximum recorded: 7.6 units, July 23, 2015; minimum recorded 6.2 units, October 10, 2016.
WATER TEMPERATURE: Maximum recorded, 31.7°C, August 10, 2007, and August 8, 9, 2011; minimum recorded, 3.9°C, January 11, 2010.
DISSOLVED OXYGEN: Maximum recorded, 11.9 mg/L, January 7,8, 2018; December 29, 2022; minimum recorded, 3.4 mg/L, June 24 and 25, 2018.
TURBIDITY: Maximum recorded, 200 FNU, September 13, 2016; minimum recorded, 2.6 FNU, December 12, 2013.
SALINITY: Maximum computed, 9.8 parts-per-thousand, November 10, 2022; minimum computed, <0.04 parts-per-thousand, many days during the period of daily record.
PHYCOERYTHRIN: Maximum recorded, 28.1 RFU, August 24, 2020; Minimum recorded, 1.2 RFU, September 22, 2020