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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-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 7-Day Average Streamflow Conditions
Provisional Data Subject to Revision 01667500 plot. RAPIDAN RIVER NEAR CULPEPER, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 10/11/2008 is 94.71 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 7-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
66.6
122
173
311
503
834
1,310
1,720
4,310
 
77
February
60.6
164
222
359
572
848
1,280
1,890
4,570
 
77
March
94.3
260
317
453
658
1,000
1,460
1,950
4,680
 
77
April
180
252
289
407
580
952
1,480
1,950
8,710
 
77
May
109
199
234
302
465
693
1,040
1,350
8,870
 
77
June
57.7
110
138
204
316
519
881
1,360
11,500
 
77
July
21.3
54.7
71.6
123
219
359
583
820
12,400
 
77
August
4.50
27.2
43.0
87.6
179
337
651
1,070
8,080
 
77
September
2.11
26.0
42.3
72.0
150
308
747
1,340
9,590
 
77
October
4.53
35.4
51.0
91.0
179
445
943
1,590
11,300
 
76
November
9.86
71.4
90.0
141
270
548
1,070
1,520
7,980
 
77
December
38.9
88.7
124
232
418
698
1,150
1,590
3,900
 
77
 
       

The current 7-day running-average value for 10/11/2008 is 94.71 cubic feet per second.

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

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