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Water-Year Summary for Site 01654500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean,Med.)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean,Med.)  
00300 Dissolved oxygen(Max.,Min.,Mean,Med.)  
00400 pH(Max.,Min.,Med.)  
63680 Turbidity, Form Neph(Med.,Max.,Min.,Mean)  

Water year 2017: 2017-10-01 to 2018-09-30
 

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USGS Water-Year Summary 2017
01654500 LONG BRANCH NEAR ANNANDALE, VA
LOCATION - Lat 38°48'39", long 77°14'07" referenced to North American Datum of 1927, Fairfax County, VA, Hydrologic Unit 02070010, on right bank, 750 ft downstream from State Highway 620 (Braddock Road) and 550 ft upstream from mouth.
DRAINAGE AREA - 3.72 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1947 to September 1956, February 2013 to current year.
GAGE - Water-stage recorder. Datum of gage is 190.64 ft NAVD of 1988. March 1947 to September 1969, gage located at several locations and at different datum.
WATER-QUALITY RECORDS
PERIOD OF RECORD - 1947 (annual maximum only), October 1947 to September 1956, October 1956 to September 1969 (annual maximum only, February 2013 to current year.
PERIOD OF DAILY RECORD - February 2013 to current year.
INSTRUMENTATION - Water-quality monitor. Electronic data logger with 15-minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
DISSOLVED OXYGEN: Maximum: 15.9 mg/L, Mar. 4, 2014, but may have been higher during periods of missing record; minimum: 4.5 mg/L, Sept. 10, 2016, but may have been lower during periods of missing record.
pH: Maximum: 8.0 standard units, Jan. 16, Apr. 18, 19 2015, but may have been higher during periods of missing record; minimum: 6.2 standard units, May 8, 2013, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum: 8,860 microsiemens/cm, Feb. 22, 2015, but may have been higher during periods of missing record; minimum: 29 microsiemens/cm, July 12, 2013, but may have been lower during periods of missing record.
TURBIDITY: Maximum: 1,330 Formazin Nephelometric Units, Apr. 15, 2014, but may have been higher during periods of missing record; minimum: 0.0 FNU, on several days.
WATER TEMPERATURE: Maximum: 28.9 °C, July 25, 2016, but may have been higher during periods of missing record; minimum: -0.3 °C, Feb. 22, 2015.