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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
02336152 SOUTH FORK PEACHTREE AT CASA RD NEAR CLARKSTON, GA
LOCATION - Lat 33°48'37.6", long 84°14'52.7" referenced to North American Datum of 1983, Dekalb County, GA, Hydrologic Unit 03130001,
DRAINAGE AREA - 5.62 mi². 5.58 square miles
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: February 2010 to current year.
GAGE-HEIGHT: February 2010 to current year.
DISCHARGE: February 2010 to current year.
GAGE-HEIGHT: February 2010 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 932.28 feet above NAVD88.
COOPERATION - DeKalb County Department of Watershed Protection.
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, 1,650 cfs, October 10, 2020; maximum gage-height recorded, 9.79 feet, October 10, 2020; minimum gage-height recorded, 2.92 feet, September 2-4, 2011; minimum daily discharge, 0.02 cfs, August 30, 2011 and September 1-3, 2011.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - February 2010 to current year.
WATER-QUALITY RECORDS
PERIOD OF RECORD - March 2012 to current.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: March 2012 to current.
pH: March 2012 to current.
WATER TEMPERATURE: March 2012 to current.
DISSOLVED OXYGEN: March 2012 to current.
TURBIDITY: March 2012 to current.
SPECIFIC CONDUCTANCE: March 2012 to current.
pH: March 2012 to current.
WATER TEMPERATURE: March 2012 to current.
DISSOLVED OXYGEN: March 2012 to current.
TURBIDITY: March 2012 to current.
INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor and an automatic refrigerated sampler.
REMARKS -
For period 04/22/2013-09/30/2015: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2015-09/30/2016: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2016-09/30/2017: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2017-09/30/2018: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2018-09/30/2019: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is 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). Hydrologic event 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Research Laboratory. Field determinations of discharge, specific conductance, pH, water temperature, turbidity, dissolved oxygen, barometric pressure, microbiology, and air temperature are by the U.S. Geological Survey.
For period 04/22/2013-09/30/2015: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2015-09/30/2016: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2016-09/30/2017: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2017-09/30/2018: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is poor.
For period 10/01/2018-09/30/2019: Water temperature and pH records are good. Specific conductance and dissolved oxygen records are fair. Turbidity record is 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). Hydrologic event 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Research Laboratory. Field determinations of discharge, specific conductance, pH, water temperature, turbidity, dissolved oxygen, barometric pressure, microbiology, and air temperature are by the U.S. Geological Survey.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum, 955 microsiemens, February 3, 2014; minimum, 10 microsiemens, July 9, 2020.
pH: Maximum, 10.1 units, October 10, 2012; minimum, 5.7 units , August 8, 2014, September 12, 2014, January 21, 2017.
WATER TEMPERATURE: Maximum, 28.6 °C, July 16, 2012 & August 8, 2022; minimum, 0.0°C, February 20, 2015, January 7, 2018.
DO: Maximum, 14.2 mg/L, February 20, 2015; minimum, 0.6 mg/L, September 26, 2016.
TURBIDITY: Maximum, 1,080 FNU, March 19, 2018; minimum, <0.5 FNU, on several days.
