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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-Day Average Streamflow
 
02056650 BACK CREEK NEAR DUNDEE, VA
LOCATION.--Latitude 37°13'39", Longitude 79°52'06", North American Datum of 1927,
                    Roanoke County, VA, Hydrologic Unit 03010101.
DRAINAGE AREA.--55.8 square miles.
PERIOD OF RECORD.--July 1974 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Small diurnal fluctuation at low flow from wastewater treatment plant 0.3 mile upstream.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.
     Duration Plot with 7-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02056650 plot. BACK CREEK NEAR DUNDEE, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 03/22/2017 is 39.43 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 7-Day Average Streamflow
            Flow values in cubic feet per second


                02056650     BACK CREEK NEAR DUNDEE, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
6.63
12.7
18.0
25.7
45.7
78.4
129
174
409
 
41
February
9.34
16.6
19.3
29.3
54.6
82.9
142
211
553
 
41
March
9.07
22.4
29.5
45.4
71.7
117
193
277
600
 
41
April
15.9
25.9
29.4
39.3
66.4
117
210
335
771
 
41
May
12.0
18.9
22.9
33.6
51.7
78.3
113
155
819
 
41
June
2.81
7.16
12.6
22.3
35.4
57.3
115
181
465
 
41
July
2.66
5.28
6.91
12.0
21.7
34.2
62.6
94.2
578
 
41
August
0.24
2.60
5.62
10.1
15.6
25.9
51.7
97.8
409
 
42
September
1.12
4.34
5.73
8.55
14.0
28.5
72.1
128
1,110
 
42
October
2.44
4.66
5.83
11.1
17.3
35.0
74.0
121
586
 
41
November
4.43
7.75
10.1
14.6
24.0
47.1
89.0
129
931
 
41
December
5.34
9.97
13.9
21.4
40.4
69.7
113
158
303
 
41
 
       

The current 7-day running-average value for 03/22/2017 is 39.43 cubic feet per second.

---- Provisional Data Subject to Revision ----

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