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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-Day Average Streamflow
 
03207800 LEVISA FORK AT BIG ROCK, VA
LOCATION.--Latitude 37°21'13", Longitude 82°11'45", North American Datum of 1927,
                    Buchanan County, VA, Hydrologic Unit 05070202.
DRAINAGE AREA.--297 square miles.
PERIOD OF RECORD.--October 1967 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 03207800 plot. LEVISA FORK AT BIG ROCK, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 03/22/2017 is 352.14 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


                03207800     LEVISA FORK AT BIG ROCK, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
30.3
70.3
116
218
395
672
1,140
1,540
3,230
 
48
February
69.0
131
177
292
473
838
1,250
1,590
3,520
 
48
March
83.1
185
250
357
564
890
1,460
1,930
4,000
 
48
April
100
173
237
333
527
820
1,300
1,860
7,030
 
48
May
67.6
125
159
230
381
638
1,080
1,570
4,430
 
48
June
27.1
49.9
65.9
107
179
345
673
981
2,610
 
48
July
9.91
36.5
47.7
78.9
126
220
370
505
1,470
 
48
August
11.2
31.4
37.0
61.6
99.4
171
308
444
1,540
 
48
September
6.36
20.9
27.4
39.1
62.3
105
168
231
794
 
48
October
5.47
17.6
25.0
35.4
57.4
122
274
488
2,040
 
47
November
7.56
28.1
33.0
46.5
101
266
466
622
2,260
 
48
December
9.06
39.2
56.5
94.6
238
504
812
1,110
2,640
 
48
 
       

The current 7-day running-average value for 03/22/2017 is 352.14 cubic feet per second.

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

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