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Water-Year Summary for Site 02054750

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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(Med.)  
00095 Specific cond at 25C(Med.)  
00400 pH(Med.)  
63680 Turbidity, Form Neph(Med.)  

Water year 2020: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2020
02054750 ROANOKE RIVER AT ROUTE 117 AT ROANOKE, VA
LOCATION - Lat 37°16'17.6", long 80°00'28.4" referenced to North American Datum of 1983, Roanoke City, VA, Hydrologic Unit 03010101, equipment is mounted on bridge rail, downstream side of bridge, near center of channel.
DRAINAGE AREA - 352 mi².
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 2005 to April 2012.
PERIOD OF DAILY RECORD - April 2005 to April 2012.
INSTRUMENTATION - Water-quality monitor. Electronic data logger with 15-minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
pH: Maximum, 9.1 standard units, Apr. 8, 2011, but may have been higher during periods of missing record; minimum, 7.1 standard units, July 11, 2006, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum, 520 microseimens/cm, Dec. 16, 2005, but may have been higher during periods of missing record; minimum, 22 microseimens/cm, May 25, 2010, but may have been lower during periods of missing record.
TURBIDITY: Maximum, 1,960 Formazin Nephelometric Units, June 26, 2006, but may have been higher during periods of missing record; minimum, 0.0 Formazin Nephelometric Units, on many days, but may have been lower during periods of missing record.
WATER TEMPERATURE: Maximum, 30.1°C, Aug. 10, 2007, but may have been higher during periods of missing record; minimum, -0.8°C, Jan. 15, 2008, but may have been lower during periods of missing record.