USGS Water-Year Summary for Site 021989773

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00045 Precipitation(Sum)
	00060 Discharge(Tid.,Tid.)
	00065 Gage height(Tid.,Tid.)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Mean,Max.,Min.)
	00400 pH(Max.,Min.,Med.)
	00480 Salinity(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Min.,Max.,Med.)

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

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USGS Water-Year Summary 2023

021989773 SAVANNAH RIVER AT USACE DOCK, AT SAVANNAH, GA

LOCATION - Lat 32°04'49.5", long 81°04'52.9" referenced to North American Datum of 1983, Chatham County, GA, Hydrologic Unit 03060109, at the United States Army Corps of Engineers Dock on Hutchinson Island, 1.2 miles downstream of US 17 (Talmadge Memorial Bridge), 2.4 miles upstream from confluence with Back River, and, at Savannah.

DRAINAGE AREA - Indeterminate.

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: May 2007 to current year.
GAGE HEIGHT: May 2007 to current year.
WATER VELOCITY: May 2007 to current year.

GAGE - Satellite telemetry with a water-stage recorder and an acoustic velocity meter. Datum of gage is the North American Vertical Datum (NAVD) of 1988.

COOPERATION - Georgia Department of Natural Resources, Environmental Protection Division.

REMARKS - Gage-height records are generally fair. Water velocity records are generally poor. Discharge records are generally poor. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-ga_nwisweb_data_inquiries@usgs.gov.

Streamflow at this site is affected significantly by astronomical tides. By convention, the U.S. Geological Survey has established ebb (seaward) flows as positive flows and flood (landward) flows as negative flows. Unfiltered 15-minute stage, velocity, and discharge data are available upon request.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 183,000 cfs, October 08, 2016; maximum gage height recorded, 8.37 feet, September 11, 2017; minimum gage height recorded, -8.10 feet, January 3, 2014.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - May 2007 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: May 2007 to current year.

pH: May 2007 to current year.

WATER TEMPERATURE: May 2007 to current year.

DISSOLVED OXYGEN: May 2007 to current year.

TURBIDITY: September 2013 to current year.

SALINITY: October 2010 to current year.

INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.

REMARKS -
For period: 10/01/2013-09/30/2014: Specific Conductance, pH, Dissolved Oxygen, Water Temperature, Turbidity, and Salinity records are rated good; occasional missing salinity values due to specific conductance less than allowable input for salinity computation.
For period: 10/01/2014-01/08/2018: Specific Conductance, pH, Water Temperature, Dissolved Oxygen, and Salinity are rated good; occasional missing salinity values due to specific conductance less than allowable input for salinity computation. Turbidity records are rated fair.
Salinity records for years prior to 2011 are unpublished.

EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 38,600 microsiemens, September 11, 2017; minimum recorded, 68 microsiemens, January 16, 2016.

pH: Maximum recorded, 8.2 units, November 29, 2011; minimum recorded, 6.4 units, several days during July and August 2013, February 11, 2016, and June 2018.

WATER TEMPERATURE: Maximum recorded, 32.0°C, August 21, 2007; minimum recorded, 4.2°C, January 12, 2010.

DISSOLVED OXYGEN: Maximum recorded, 13.2 mg/L, January 13-15, 2010; minimum recorded, 0.5 mg/L, August 21, 2017

TURBIDITY: Maximum recorded, 460 FNU, July 26, 2016; minimum recorded, <0.5 FNU, several days during period of record.

SALINITY: Maximum computed, 24.6 parts-per-thousand, September 11, 2017; minimum computed, <0.04 parts-per-thousand, on many days during period of record.