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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-Day Average Streamflow
 
02056900 BLACKWATER RIVER NEAR ROCKY MOUNT, VA
LOCATION.--Latitude 37°02'42", Longitude 79°50'40", 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 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02056900 plot. BLACKWATER RIVER NEAR ROCKY MOUNT, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 03/22/2017 is 81.43 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


                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
26.7
45.6
56.1
74.2
120
184
264
333
647
 
39
February
34.9
51.9
58.8
77.2
126
178
265
385
702
 
39
March
34.1
59.4
71.4
114
159
245
333
464
845
 
39
April
49.9
66.4
73.7
95.4
160
263
398
621
1,390
 
39
May
33.5
54.5
61.4
88.0
136
174
234
296
1,040
 
39
June
10.9
28.9
41.0
66.8
97.8
136
277
390
687
 
39
July
11.0
21.9
26.6
44.3
67.5
100
160
294
618
 
39
August
3.89
13.1
16.6
32.8
54.1
83.1
141
191
401
 
39
September
8.10
19.1
23.1
31.3
51.5
79.2
180
308
648
 
39
October
12.6
17.6
25.5
39.4
50.5
83.4
180
320
765
 
38
November
16.2
29.3
33.7
50.9
71.1
120
198
276
1,040
 
39
December
23.9
32.4
40.3
58.0
110
164
214
298
438
 
39
 
       

The current 14-day running-average value for 03/22/2017 is 81.43 cubic feet per second.

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

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