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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 3818'30", Longitude 7731'46", 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 2015.
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 02/23/2017 is 502.0 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
375
510
900
1,430
2,360
4,070
5,950
47,000
 
108
February
126
490
690
1,060
1,700
2,630
4,430
6,580
52,000
 
108
March
206
735
888
1,250
1,840
2,920
5,040
7,500
51,500
 
108
April
385
708
810
1,120
1,620
2,600
4,280
6,510
81,100
 
108
May
283
500
601
832
1,270
2,020
3,540
5,170
51,000
 
108
June
125
277
351
525
858
1,470
2,770
4,140
84,200
 
108
July
17.0
127
174
302
542
964
1,770
2,850
21,400
 
108
August
8.80
67.0
105
215
425
796
1,720
2,980
68,400
 
108
September
6.20
56.0
99.0
170
344
744
1,780
3,020
54,600
 
108
October
5.00
89.0
122
221
440
958
2,030
3,820
127,000
 
108
November
45.0
193
247
382
680
1,320
2,680
4,310
44,300
 
108
December
70.0
260
355
598
1,080
1,940
3,560
5,420
36,300
 
108
 
       
Instantaneous minimum flow for period of record = 5.00 cubic feet per second.

The current daily value for 02/23/2017 is 502.0 cubic feet per second.

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

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