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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
02047500 BLACKWATER RIVER NEAR DENDRON, VA
LOCATION.--Latitude 3701'30", Longitude 7652'30", North American Datum of 1927,
                    Surry County, VA, Hydrologic Unit 03010202.
DRAINAGE AREA.--290 square miles.
PERIOD OF RECORD.--October 1941 to December 1986, July 1988 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
02047500 plot. 
BLACKWATER RIVER NEAR DENDRON, VA
Provisional Data Subject to Revision

                    

The current daily value for 03/22/2017 is 338.0 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


                02047500     BLACKWATER RIVER NEAR DENDRON, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
2.30
44.0
110
215
360
580
904
1,240
3,470
 
72
February
28.0
109
152
242
444
688
1,030
1,320
4,680
 
72
March
19.0
131
190
292
470
758
1,190
1,490
4,680
 
72
April
11.0
78.0
101
189
336
598
944
1,280
3,280
 
72
May
1.00
17.0
30.0
67.0
155
313
574
839
2,760
 
72
June
0.00
0.01
1.11
13.0
53.0
160
388
596
4,550
 
72
July
0.00
0.00
0.00
2.60
25.0
132
360
624
4,600
 
72
August
0.00
0.00
0.00
2.20
27.0
139
410
903
5,010
 
73
September
0.00
0.00
0.00
0.54
16.0
82.0
559
1,270
11,400
 
73
October
0.00
0.00
0.00
2.30
34.0
145
422
665
10,500
 
73
November
0.00
0.00
1.10
36.0
104
269
546
877
2,700
 
73
December
0.00
4.52
29.0
105
230
425
763
1,100
2,580
 
73
 
       
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 338.0 cubic feet per second.

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

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