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Water-Year Summary for Site 02055080

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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 2019: 2018-10-01 to 2019-09-30
 

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USGS Water-Year Summary 2019
02055080 ROANOKE RIVER AT THIRTEENTH STREET BRIDGE AT ROANOKE, VA
LOCATION - Lat 37°15'51.1", long 79°54'55.6" referenced to North American Datum of 1983, Roanoke City, VA, Hydrologic Unit 03010101, equipment is mounted on concrete wall, downstream side of bridge, near center of channel.
DRAINAGE AREA - 390 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, 9.2 standard units, on several days, but may have been higher during periods of missing record; minimum, 6.9 standard units, Sept. 30, 2010, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum, 677 microseimens/cm, Jan. 26, 2011, but may have been higher during periods of missing record; minimum, 14 microseimens/cm, Nov. 16, 2006, but may have been lower during periods of missing record.
TURBIDITY: Maximum, 1,930 Formazin Nephelometric Units, May 29, 2010, but may have been higher during periods of missing record; minimum, 0.0 Formazin Nephelometric Units, on several days, but may have been lower during periods of missing record.
WATER TEMPERATURE: Maximum, 30.9°C, Aug. 9, 2007, but may have been higher during periods of missing record; minimum, -0.1°C, Jan. 16 and 17, 2009, Dec. 14, 28, 2010, but may have been lower during periods of missing record.