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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 2007.
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 08/27/2008 is 73.11 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
132
184
327
588
882
1,250
1,490
2,550
 
82
February
89.9
169
250
429
688
1,090
1,430
1,600
2,660
 
82
March
91.7
290
378
565
898
1,310
1,700
2,050
2,740
 
82
April
176
297
378
560
865
1,320
1,800
2,060
3,130
 
82
May
143
223
264
414
636
949
1,250
1,410
3,360
 
82
June
95.4
143
170
235
379
688
1,080
1,280
2,270
 
82
July
62.7
92.6
107
137
185
286
601
921
2,150
 
82
August
59.6
78.9
86.4
105
150
245
411
766
1,700
 
82
September
55.2
68.3
75.4
90.2
123
217
569
822
1,630
 
82
October
44.5
65.9
74.7
90.6
130
270
620
918
1,890
 
81
November
45.5
74.4
84.5
106
195
400
798
992
2,910
 
82
December
63.6
89.2
102
193
385
669
1,040
1,480
2,950
 
82
 
       

The current 28-day running-average value for 08/27/2008 is 73.11 cubic feet per second.

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

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