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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-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 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 01667500 plot. RAPIDAN RIVER NEAR CULPEPER, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 10/11/2008 is 130.79 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


                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
66.1
123
190
326
520
826
1,220
1,500
3,270
 
77
February
63.4
171
222
371
594
900
1,330
1,590
3,990
 
77
March
102
264
337
485
695
967
1,370
1,890
3,480
 
77
April
182
261
312
436
638
1,020
1,500
1,880
4,600
 
77
May
122
224
248
321
498
749
1,040
1,320
4,970
 
77
June
67.4
119
158
230
358
545
945
1,320
5,830
 
77
July
30.1
65.6
85.3
135
237
380
578
794
6,900
 
77
August
7.19
33.1
48.0
94.7
200
382
664
960
4,750
 
77
September
2.69
28.8
44.7
80.1
158
329
818
1,560
5,530
 
77
October
5.07
38.4
51.2
92.9
186
471
972
1,650
6,300
 
76
November
9.71
71.3
91.2
143
268
603
1,050
1,470
4,480
 
77
December
40.9
91.1
129
247
431
722
1,140
1,620
2,700
 
77
 
       

The current 14-day running-average value for 10/11/2008 is 130.79 cubic feet per second.

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

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