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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-Day Average Streamflow
 
02016000 COWPASTURE RIVER NEAR CLIFTON FORGE, VA
LOCATION.--Latitude 37°47'30", Longitude 79°45'35", North American Datum of 1927,
                    Alleghany County, VA, Hydrologic Unit 02080201.
DRAINAGE AREA.--461 square miles.
PERIOD OF RECORD.--March 1925 to current year. Records for May 1907 to August 1908, published in WSP 242, are unreliable and should not be used.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Occasional withdrawal of water during summer months for the filling of swimming pool at camp 10 to 15 miles above gage.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with 28-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02016000 plot. COWPASTURE RIVER NEAR CLIFTON FORGE, VA
Provisional Data Subject to Revision

                    

The current 28-day running-average value for 03/22/2017 is 225.61 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


                02016000     COWPASTURE RIVER NEAR CLIFTON FORGE, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
81.9
134
181
331
579
875
1,250
1,480
2,550
 
90
February
89.9
176
245
426
685
1,080
1,430
1,590
2,660
 
90
March
91.7
287
372
567
902
1,300
1,690
2,020
2,740
 
90
April
176
302
387
579
872
1,310
1,780
2,030
3,130
 
90
May
143
224
272
424
667
996
1,300
1,530
3,360
 
90
June
95.4
146
174
239
389
701
1,070
1,270
2,270
 
90
July
62.7
94.3
109
135
181
288
603
905
2,150
 
90
August
59.6
79.1
86.9
105
148
233
401
674
1,700
 
90
September
55.2
69.8
75.9
90.2
120
210
529
786
1,630
 
90
October
44.5
66.1
76.3
90.7
128
255
593
870
1,890
 
89
November
45.5
74.3
84.3
105
174
381
773
974
2,910
 
90
December
63.6
90.0
102
191
389
670
1,100
1,450
2,950
 
90
 
       

The current 28-day running-average value for 03/22/2017 is 225.61 cubic feet per second.

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

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