USGS Water-Year Summary for Site 02203831

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(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Med.,Max.,Min.)

Select a water year

Water year 2024: 2024-10-01 to 2025-09-30

Print this page

USGS Water-Year Summary 2024

02203831 DOOLITTLE CREEK AT FLAT SHOALS RD, NR DECATUR, GA

LOCATION - Lat 33°42'20.5", long 84°17'31.9" referenced to North American Datum of 1983, Dekalb County, GA, Hydrologic Unit 03070103,

DRAINAGE AREA - 4.16 mi².

REVISIONS HISTORY -

Drainage area was revised on May 8, 2023, based on a more accurate determination of the drainage area.

Gage datum was revised on March 21, 2022, based on an error in the determination of the gage datum.

SURFACE-WATER RECORDS

PERIOD OF RECORD - GAGE-HEIGHT: April 2012 to current year

GAGE - Satellite telemetry with water-stage recorder and a continuous water-quality monitor. Datum of gage is 788.95 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 instantaneous discharge, unknown, October 10, 2020. Maximum instantaneous gage height, 7.22 ft, October 10, 2020. Minimum daily mean discharge, 0.20 CFS, on September 13-15, 28, 2012.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - April 2012 to current year

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD - October 11, 2012 to current year

INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.

REMARKS -

For period 10/01/2014-09/30/2015: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2015-09/30/2016: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2016-09/30/2017: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2017-09/30/2018: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated poor.
For period 10/01/2018-09/30/2019: Water temperature, specific conductance, and pH records are rated good. Dissolved oxygen record is rated fair. Turbidity record is rated 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 code of 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 Laboratory. Field determinations of discharge, specific conductance, pH, water temperature, turbidity, barometric pressure, air temperature, microbiology, and dissolved oxygen are by the U.S. Geological Survey.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 1860 microsiemens, January 22, 2018; minimum, 19 microsiemens, September 2, 2016, July 20, 2019.

pH: Maximum, 7.9 units, June 23, 2016; minimum, 5.9 units, May 18, 2015.

WATER TEMPERATURE: Maximum, 27.4°C, July 30, 2022; minimum, 0.0°C, January 30, 2014.

DISSOLVED OXYGEN: Maximum, 14.3 mg/L, January 30, 2014; minimum, 6.2 mg/L, May 28, 2019.

TURBIDITY: Maximum, >1,100 FNU, June 26, 2013, January 11, 2014, August 2, 2018; minimum, <0.5 FNU, on many days.