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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
02049500 BLACKWATER RIVER NEAR FRANKLIN, VA
LOCATION.--Latitude 3645'45", Longitude 7653'55", North American Datum of 1927,
                    Southampton County, VA, Hydrologic Unit 03010202.
DRAINAGE AREA.--613 square miles.
PERIOD OF RECORD.--August 1944 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Some regulation by dam and pumping station 1.4 mile above gage. Diversion of water 1.4 mile above gage. Reversed flow by tide some year, caution under 20 cfs.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.

     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision
02049500 plot. 
BLACKWATER RIVER NEAR FRANKLIN, VA
Provisional Data Subject to Revision

                    

The current daily value for 03/22/2017 is 794.0 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


                02049500     BLACKWATER RIVER NEAR FRANKLIN, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
4.70
116
267
503
754
1,250
1,900
2,230
5,560
 
71
February
22.0
273
372
561
960
1,510
2,090
2,550
7,150
 
71
March
56.0
300
418
630
975
1,510
2,300
2,830
6,550
 
71
April
16.0
135
222
415
696
1,190
1,970
2,400
5,610
 
71
May
1.50
34.0
62.0
150
373
670
1,190
1,770
5,370
 
71
June
0.20
4.56
8.80
34.0
153
447
857
1,300
7,110
 
71
July
0.00
1.80
4.10
12.0
66.0
322
843
1,400
5,270
 
71
August
0.00
1.50
2.90
11.0
78.0
377
986
2,000
6,080
 
71
September
0.00
1.40
2.40
6.90
31.0
262
1,400
2,490
22,000
 
72
October
0.02
1.20
2.30
8.00
59.0
350
920
1,670
20,900
 
71
November
0.21
2.81
5.10
32.0
200
573
1,130
1,690
5,020
 
71
December
0.10
18.0
58.2
222
492
913
1,520
1,990
4,340
 
71
 
       
Instantaneous minimum flow for period of record = 0.00 cubic feet per second.
Flow values of 0.00 are plotted as 0.01

The current daily value for 03/22/2017 is 794.0 cubic feet per second.

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

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