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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-Day Average Streamflow
 
02047500 BLACKWATER RIVER NEAR DENDRON, VA
LOCATION.--Latitude 37°01'30", Longitude 76°52'30", 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 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02047500 plot. BLACKWATER RIVER NEAR DENDRON, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 03/22/2017 is 292 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


                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
4.98
30.8
106
211
366
566
853
1,080
2,260
 
72
February
26.5
122
177
250
456
686
966
1,310
2,840
 
72
March
26.6
152
216
323
495
780
1,150
1,360
2,600
 
72
April
19.1
89.5
133
244
436
684
974
1,170
2,290
 
72
May
6.14
35.6
52.7
113
215
374
586
828
1,670
 
72
June
0.00
1.82
6.75
34.2
92.2
210
432
604
2,010
 
72
July
0.00
0.00
0.28
6.71
40.4
157
345
530
2,860
 
72
August
0.00
0.00
0.00
6.88
45.1
197
535
844
2,870
 
72
September
0.00
0.00
0.00
2.31
23.4
130
698
1,200
4,490
 
73
October
0.00
0.00
0.00
3.79
36.4
160
479
970
3,460
 
72
November
0.00
0.00
0.83
27.6
87.8
257
528
791
1,980
 
73
December
0.00
2.67
25.0
97.4
209
429
713
1,010
1,750
 
73
 
       

The current 14-day running-average value for 03/22/2017 is 292 cubic feet per second.

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

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