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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-Day Average Streamflow
 
01667500 RAPIDAN RIVER NEAR CULPEPER, VA
LOCATION.--Latitude 38°21'01", Longitude 77°58'31", North American Datum of 1927,
                    Culpeper County, VA, Hydrologic Unit 02080103.
DRAINAGE AREA.--468 square miles.
PERIOD OF RECORD.--October 1930 to current year. Monthly discharge only for some periods, published in WSP 1302.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2007.
REGULATION.--Low-water flow regulated by operation of mill prior to 1977, since 1986 by a powerplant. Some diversion during summer months for irrigation.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.
     Duration Plot with 28-Day Average Streamflow Conditions
Provisional Data Subject to Revision 01667500 plot. RAPIDAN RIVER NEAR CULPEPER, VA
Provisional Data Subject to Revision

                    

The current 28-day running-average value for 08/27/2008 is 42.71 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 28-Day Average Streamflow
            Flow values in cubic feet per second


                01667500     RAPIDAN RIVER NEAR CULPEPER, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
63.6
125
198
334
549
798
1,110
1,370
2,090
 
77
February
68.8
185
253
386
620
917
1,170
1,440
3,530
 
77
March
92.7
287
377
494
689
943
1,340
1,740
3,060
 
77
April
190
288
365
503
690
1,100
1,480
1,800
2,780
 
77
May
159
246
278
361
538
782
1,140
1,460
2,880
 
77
June
80.7
149
194
286
412
626
914
1,170
3,090
 
77
July
43.7
83.5
103
164
279
405
660
953
3,720
 
77
August
10.5
40.3
58.7
124
221
387
612
927
2,560
 
77
September
9.37
31.5
55.3
93.8
185
378
815
1,360
3,100
 
77
October
6.82
39.2
54.9
92.9
198
517
1,110
1,610
3,440
 
76
November
8.39
63.9
88.8
143
273
603
1,040
1,350
3,510
 
77
December
32.1
92.5
130
234
445
686
1,180
1,470
2,670
 
77
 
       

The current 28-day running-average value for 08/27/2008 is 42.71 cubic feet per second.

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

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