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Water-Year Summary for Site 021989792

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  • 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.
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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(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Med.)  
00480 Salinity(Max.,Min.,Med.)  
63680 Turbidity, Form Neph(Max.,Min.,Med.)  

Water year 2020: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2020
021989792 LITTLE BACK RIVER AT GA 25 AT PORT WENTWORTH, GA
LOCATION - Lat 32°09'57", long 81°07'48" referenced to North American Datum of 1983, Chatham County, GA, Hydrologic Unit 03060109, at downstream side of bridge on GA 25, 9.9 miles from mouth at Savannah River, and 2.25 miles northeast of Pt. Wentworth, GA.
DRAINAGE AREA - Indeterminate.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: May 2009 to current year.
GAGE HEIGHT: May 2009 to current year.
WATER VELOCITY: May 2009 to current year.
GAGE - Satellite telemetry with a water-stage recorder and acoustic velocity meter. Datum of gage is the North American Vertical Datum (NAVD) of 1988 (from U.S. Geological Survey levels). Prior to October 1, 2010, the datum of gage was 12.2 feet below the North American Vertical Datum (NAVD) of 1988.
COOPERATION - Georgia Department of Natural Resources, Environmental Protection Division.
REMARKS -
For period: 10/01/2014-08/14/2018: Discharge records fair. Gage-height records good. Water velocity records fair.
For period: 08/15/2018-12/04/2018: Discharge records poor. Gage-height records good. Water velocity records poor.
For period: 12/05/2018-06/17/2019: Discharge records fair. Gage-height records good. Water velocity records fair.
For period: 06/17/2019-11/19/2019: Discharge records fair. Gage-height records good. Water velocity records good.
For period: 11/19/2019-03/02/2020: Discharge records poor. Gage-height records good. Water velocity records good.
For period: 03/02/2020-05/05/2020: Discharge records fair. Gage-height records fair. Water velocity records good.
For period: 05/05/2020-07/08/2020: Discharge records poor. Gage-height records poor. Water velocity records good.
For period: 07/08/2020-10/20/2020: Discharge records fair. Gage-height records fair. Water velocity records good.

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.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 15,800 cfs, December 2, 2009; maximum gage-height recorded, 7.18 feet, October 8, 2016; minimum gage-height recorded, -6.47 feet, April 16, 2018. Extremes have been adjusted to NAVD of 1988.
WATER-QUALITY RECORDS
REMARKS -
For period 10/01/2014-10/03/2017: Specific Conductance, pH, Dissolved Oxygen, Turbidity, and Salinity records rated fair; Water Temperature records rated good.
EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 24,300 microsiemens, October 8, 2016; minimum recorded, 47 microsiemens; March 5 and 6, 2020.

pH: Maximum recorded, 7.7 units; April 12, 13, 20, 21, 2018; Minimum recorded, 6.0 units; August 14, 15, 2017.

WATER TEMPERATURE: Maximum recorded, 31.5°C, July 30, 2016; minimum recorded, 2.8°C, January 04, 2018.

DISSOLVED OXYGEN: Maximum recorded, 11.4 mg/L, January 4, 5, 7, 8, 9, 2018; minimum recorded, 1.9 mg/L, August 23, 2016

TURBIDITY: Maximum recorded, 367 FNU; July 05, 2019; minimum recorded, 1.4 FNU, November 23, 2013.

SALINITY: Maximum computed, 14.7 parts-per-thousand, October 8, 2016; minimum computed, <0.04 parts-per-thousand on many days for the period of record.