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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-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 28-Day Average Streamflow Conditions
Provisional Data Subject to Revision 03207800 plot. LEVISA FORK AT BIG ROCK, VA
Provisional Data Subject to Revision

                    

The current 28-day running-average value for 03/22/2017 is 476.68 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


                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
37.6
82.5
129
248
418
595
874
1,100
1,880
 
48
February
85.9
194
232
337
533
784
1,060
1,260
1,640
 
48
March
113
239
328
469
626
908
1,180
1,340
2,310
 
48
April
148
270
316
487
655
893
1,270
1,500
2,460
 
48
May
101
178
233
356
546
754
1,030
1,190
2,440
 
48
June
39.9
81.4
111
158
270
521
752
931
1,370
 
48
July
24.0
45.9
61.2
106
159
251
469
601
1,180
 
48
August
29.7
41.0
52.5
78.1
138
217
335
401
664
 
48
September
12.8
31.7
38.1
52.0
76.7
134
191
245
385
 
48
October
6.27
25.5
29.2
41.3
69.6
118
301
390
741
 
47
November
7.11
31.4
35.9
43.4
95.2
236
398
483
966
 
48
December
18.8
38.6
55.2
108
227
439
689
839
1,290
 
48
 
       

The current 28-day running-average value for 03/22/2017 is 476.68 cubic feet per second.

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

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