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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
01668000 RAPPAHANNOCK RIVER NEAR FREDERICKSBURG, VA
LOCATION.--Latitude 38°18'30", Longitude 77°31'46", North American Datum of 1927,
                    Spotsylvania County, VA, Hydrologic Unit 02080104.
DRAINAGE AREA.--1,595 square miles.
PERIOD OF RECORD.--September 1907 to current year. Monthly discharge only for some periods, published in WSP 1302.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2007.
REGULATION.--Some regulation from powerplants and mills above station in past years (none current).
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision 01668000 plot. RAPPAHANNOCK RIVER NEAR FREDERICKSBURG, VA
Provisional Data Subject to Revision

                    

The current daily value for 08/28/2008 is 30 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


                01668000     RAPPAHANNOCK RIVER NEAR FREDERICKSBURG, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
147
385
540
923
1,450
2,400
4,130
6,000
47,000
 
100
February
126
496
730
1,100
1,720
2,700
4,470
6,770
52,000
 
100
March
206
764
913
1,250
1,830
2,900
5,030
7,450
51,500
 
100
April
385
705
807
1,120
1,620
2,590
4,300
6,510
81,100
 
100
May
283
492
586
814
1,250
1,960
3,440
4,970
51,000
 
100
June
125
269
345
514
848
1,420
2,700
4,140
84,200
 
100
July
17.0
127
174
309
545
975
1,780
2,910
21,400
 
100
August
8.80
66.0
105
220
436
838
1,780
3,190
68,400
 
100
September
6.20
60.0
99.1
172
355
760
1,810
3,120
54,600
 
100
October
5.00
92.0
124
225
447
961
2,030
3,690
127,000
 
100
November
45.0
197
250
385
687
1,340
2,700
4,460
44,300
 
100
December
70.0
260
354
600
1,070
1,900
3,480
5,230
36,300
 
100
 
       
Instantaneous minimum flow for period of record = 5.00 cubic feet per second.

The current daily value for 08/28/2008 is 30 cubic feet per second.

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

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