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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-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 28-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02056650 plot. BACK CREEK NEAR DUNDEE, VA
Provisional Data Subject to Revision

                    

The current 28-day running-average value for 03/22/2017 is 39.36 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 28-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
8.48
12.9
20.3
32.0
51.5
77.9
99.8
116
198
 
41
February
11.4
18.9
21.5
31.7
60.1
93.9
130
167
340
 
41
March
12.3
22.7
27.7
48.5
73.4
116
185
199
317
 
41
April
21.4
29.9
33.4
48.3
84.9
135
201
248
414
 
41
May
15.4
26.5
30.4
39.4
62.5
95.6
150
218
415
 
41
June
5.78
13.2
20.8
30.4
47.6
69.2
114
162
261
 
41
July
4.64
6.79
9.04
15.3
26.7
45.8
116
167
277
 
41
August
1.06
5.47
7.13
13.6
19.8
32.5
54.2
81.9
147
 
42
September
3.27
6.07
7.71
11.0
17.2
37.7
67.3
135
335
 
42
October
2.75
5.83
7.33
11.5
16.8
37.2
81.1
140
368
 
41
November
5.52
7.78
11.6
15.4
24.8
48.1
84.6
139
301
 
41
December
6.47
10.4
12.6
20.9
45.5
73.0
109
121
294
 
41
 
       

The current 28-day running-average value for 03/22/2017 is 39.36 cubic feet per second.

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

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