USGS Water-Year Summary for Site 02336240

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

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Water year 2022: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2022

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.

SURFACE-WATER RECORDS

PERIOD OF RECORD -
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 829.58 feet above National Geodetic Vertical Datum (NGVD) of 1929 (USCOE benchmark).

COOPERATION - City of Atlanta.

REMARKS -
For period 10/01/2013-12/28/2020: Discharge record fair, except for days of estimated discharge, which are poor. Gage height record is good.

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.

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.

EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 587 microsiemens, January 22, 2018; minimum recorded, 13 microsiemens, September 17, 2020.

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.