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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
02056900 BLACKWATER RIVER NEAR ROCKY MOUNT, VA
LOCATION.--Latitude 3702'42", Longitude 7950'40", North American Datum of 1927,
                    Franklin County, VA, Hydrologic Unit 03010101.
DRAINAGE AREA.--115 square miles.
PERIOD OF RECORD.--October 1976 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--No known regulation.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.

     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision
02056900 plot. 
BLACKWATER RIVER NEAR ROCKY MOUNT, VA
Provisional Data Subject to Revision

                    

The current daily value for 03/22/2017 is 82.0 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily


      Duration Table of Daily Streamflow
           
Flow values in cubic feet per second


                02056900     BLACKWATER RIVER NEAR ROCKY MOUNT, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
21.0
40.0
50.0
70.0
108
152
249
396
3,200
 
39
February
31.0
48.0
55.2
77.0
118
170
265
362
2,390
 
39
March
30.0
57.0
69.0
102
144
212
343
553
3,580
 
39
April
39.0
60.0
67.0
87.8
140
209
333
504
4,990
 
39
May
26.0
45.0
53.0
78.0
116
158
220
295
1,010
 
39
June
7.60
25.0
32.0
55.0
83.0
120
200
318
2,910
 
39
July
6.50
17.0
22.0
39.0
61.0
87.0
141
208
1,990
 
39
August
2.70
9.60
15.0
27.0
47.0
71.0
121
178
2,770
 
39
September
6.40
14.6
19.0
29.0
45.0
69.0
142
239
4,030
 
39
October
9.80
16.0
23.0
36.0
48.0
83.0
149
236
5,000
 
39
November
19.0
27.0
32.1
48.0
68.0
116
188
275
5,410
 
39
December
21.0
32.0
39.0
57.5
98.0
140
214
300
1,370
 
39
 
       
Instantaneous minimum flow for period of record = 2.60 cubic feet per second.

The current daily value for 03/22/2017 is 82.0 cubic feet per second.

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

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