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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-Day Average Streamflow
 
03529500 POWELL RIVER AT BIG STONE GAP, VA
LOCATION.--Latitude 36°52'08", Longitude 82°46'32", North American Datum of 1927,
                    Wise County, VA, Hydrologic Unit 06010206
DRAINAGE AREA.--112 square miles.
PERIOD OF RECORD.--October 1944 to September 1959, October 1978 to September 1981, October 2001 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2007.
REGULATION.--No known regulation.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 03529500 plot. POWELL RIVER AT BIG STONE GAP, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 12/03/2008 is 63 cubic feet per second.

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


                03529500     POWELL RIVER AT BIG STONE GAP, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
16.1
26.9
38.3
121
258
417
630
767
1,270
 
24
February
37.6
89.8
113
183
295
523
797
1,350
1,830
 
24
March
83.7
132
159
209
295
463
834
1,020
1,350
 
24
April
106
125
150
212
292
420
550
665
1,030
 
24
May
50.1
80.1
101
142
223
297
421
533
1,150
 
24
June
21.9
37.2
46.6
61.7
101
194
307
409
1,040
 
24
July
19.5
27.8
33.0
41.1
61.2
99.8
165
205
294
 
24
August
8.90
15.5
20.7
31.0
52.5
88.5
133
200
461
 
24
September
6.43
8.83
11.6
21.5
34.3
56.9
89.6
111
388
 
24
October
6.24
8.82
10.8
18.6
26.1
46.1
84.2
111
241
 
22
November
7.71
11.1
12.3
24.0
42.0
151
250
280
401
 
24
December
9.49
31.2
36.8
51.1
161
274
518
636
1,030
 
24
 
       

The current 14-day running-average value for 12/03/2008 is 63 cubic feet per second.

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

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