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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-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 2015.
REGULATION.--No known regulation.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with 7-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 7-day running-average value for 03/22/2017 is 179.57 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


                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
14.9
30.4
53.0
121
221
400
693
889
2,250
 
32
February
45.6
85.1
101
154
245
428
819
1,060
3,200
 
32
March
82.9
125
147
202
288
455
809
1,030
1,900
 
32
April
91.7
113
129
180
266
410
553
665
1,520
 
32
May
47.7
70.6
88.1
124
182
284
420
637
1,360
 
32
June
19.4
34.3
41.7
56.2
94.0
156
308
394
1,390
 
32
July
16.1
26.8
31.4
42.1
68.1
114
216
298
627
 
32
August
7.71
14.7
20.4
33.3
60.1
110
162
219
734
 
32
September
5.71
8.83
11.4
26.0
39.3
67.1
120
149
741
 
32
October
6.13
9.29
12.2
19.0
30.4
60.6
111
143
576
 
31
November
7.14
11.7
17.0
25.9
55.5
152
250
348
665
 
32
December
7.49
29.3
35.9
57.9
161
308
531
682
1,400
 
32
 
       

The current 7-day running-average value for 03/22/2017 is 179.57 cubic feet per second.

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

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