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USGS Water-Year Summary 2024
02336240 SOUTH FORK PEACHTREE CREEK AT JOHNSON ROAD NEAR ATLANTA, GA
LOCATION - Lat 33°48'11.1", long 84°20'26.5" referenced to North American Datum of 1983, Dekalb County, GA, Hydrologic Unit 03130001, on downstream side of bridge on Johnson Road, 0.20 miles east of US 23, 0.8 miles downstream of Peavine Creek, and 2.8 miles upstream of confluence with Peachtree Creek.
DRAINAGE AREA - 27.6 mi². revised.
REVISIONS HISTORY -
WDR GA-2013: Drainage area.
Gage datum was revised on December 21, 2022, based on an error in the determination of the gage datum.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: April 2003 to current year.
GAGE-HEIGHT: April 2003 to current year.
DISCHARGE: April 2003 to current year.
GAGE-HEIGHT: April 2003 to current year.
GAGE - Satellite telemetry with a water-stage recorder and a continuous water-quality monitor. Datum of gage is 811.83 feet above NAVD88.
COOPERATION - City of Atlanta.
REMARKS - Gage-height records are generally good. Discharge records are generally fair except for estimated discharges, which are 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.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 4,800 cfs, September 16, 2004, maximum gage-height recorded 16.10 feet, September 16, 2004; minimum daily discharge, 0.21 cfs, September 25, 2008.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - April 2003 to current year.
INSTRUMENTATION - Tipping-bucket raingage.
WATER-QUALITY RECORDS
PERIOD OF RECORD - August 2003 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: June 2003 to current year.
pH: June 2003 to current year.
WATER TEMPERATURE: June 2003 to current year.
DISSOLVED OXYGEN: June 2003 to current year.
TURBIDITY: June 2003 to current year.
SPECIFIC CONDUCTANCE: June 2003 to current year.
pH: June 2003 to current year.
WATER TEMPERATURE: June 2003 to current year.
DISSOLVED OXYGEN: June 2003 to current year.
TURBIDITY: June 2003 to current year.
INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.
REMARKS -
10/01/2013-09/30/2016: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
10/01/2016-09/30/2017: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
10/01/2017-09/30/2018: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
10/01/2018-09/30/2019: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
Data for parameter code 63680 (turbidity) were collected using a probe with the following specifications: turbidity, water, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU (Formazin Nephelometric Units). Prior to October 1, 2004, turbidity data were published using parameter code 00076: turbidity, water, unfiltered, NTU (Nephelometric Turbidity Units). Hydrologic event 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI, and Test America Laboratory, Denver, CO. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Laboratory. Field determinations of discharge, gage height, specific conductance, pH, water temperature, air temperature, turbidity, barometric pressure, microbiology, and dissolved oxygen are by the U.S. Geological Survey.
10/01/2013-09/30/2016: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
10/01/2016-09/30/2017: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
10/01/2017-09/30/2018: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
10/01/2018-09/30/2019: Specific conductance, pH, water temperature, and dissolved oxygen records are fair. Turbidity records are poor.
Data for parameter code 63680 (turbidity) were collected using a probe with the following specifications: turbidity, water, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU (Formazin Nephelometric Units). Prior to October 1, 2004, turbidity data were published using parameter code 00076: turbidity, water, unfiltered, NTU (Nephelometric Turbidity Units). Hydrologic event 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI, and Test America Laboratory, Denver, CO. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Laboratory. Field determinations of discharge, gage height, specific conductance, pH, water temperature, air temperature, turbidity, barometric pressure, microbiology, and dissolved oxygen are by the U.S. Geological Survey.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 970 microsiemens, January 20, 2022; minimum recorded, 16 microsiemens, April 19, 2019.
pH: Maximum recorded, 9.1 units, August 29, 2007; minimum recorded, 6.0 units, August 21, 2010 and October 24, 2020.
WATER TEMPERATURE: Maximum recorded, 32.4°C, July 1, 2012; minimum recorded, -0.1°C, January 18, 2018.
DISSOLVED OXYGEN: Maximum recorded, 16.1 mg/L, January 21, 2008; minimum recorded, 2.1 mg/L, April 12, 2004, August 24, 2007.
TURBIDITY: Maximum recorded, >2,200 FNU on several days; minimum recorded, <0.5 FNU on many days.
SPECIFIC CONDUCTANCE: Maximum recorded, 970 microsiemens, January 20, 2022; minimum recorded, 16 microsiemens, April 19, 2019.
pH: Maximum recorded, 9.1 units, August 29, 2007; minimum recorded, 6.0 units, August 21, 2010 and October 24, 2020.
WATER TEMPERATURE: Maximum recorded, 32.4°C, July 1, 2012; minimum recorded, -0.1°C, January 18, 2018.
DISSOLVED OXYGEN: Maximum recorded, 16.1 mg/L, January 21, 2008; minimum recorded, 2.1 mg/L, April 12, 2004, August 24, 2007.
TURBIDITY: Maximum recorded, >2,200 FNU on several days; minimum recorded, <0.5 FNU on many days.
