Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
  • Please see news on new formats
  • UPDATE, 11/9: As of November 8, the USGS has successfully restored all of the operational gages that stopped transmitting due to an issue with the satellite telemetry system that records and transmits data. The USGS will now focus on restoring other equipment that experienced the telemetry issues, including about 85 rapid deployment gages that are used periodically for emergency response. Read more
  • Full News RSS icon

Water-Year Summary for Site 021989773

Click to hide Water-Year Summary instructions and information
  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
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(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Med.)  
00480 Salinity(Max.,Min.,Med.)  
63680 Turbidity, Form Neph(Min.,Med.,Max.)  

Water year 2018: 2018-10-01 to 2019-09-30

Print this page
USGS Water-Year Summary 2018
LOCATION - Lat 32°04'51", long 81°04'53" referenced to North American Datum of 1927, 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.
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.
For period: 10/01/2013-11/01/2016: Discharge records poor. Gage-height records good. Water velocity records poor.
For period: 11/02/2016-10/17/2017: Discharge records poor. Gage-height records fair. Water velocity records poor.
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.
PERIOD OF RECORD - May 2007 to current year.
INSTRUMENTATION - Tipping-bucket raingage.
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.
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.
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 and February 11, 2016.

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, October 31, 2013 and June 9, 2014.

SALINITY: Maximum computed, 24.6 parts-per-thousand, September 11, 2017; minimum computed, <0.04 parts-per-thousand, on many days in water years 2013, 2014, 2015, and 2016.