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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-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 7-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02016000 plot. COWPASTURE RIVER NEAR CLIFTON FORGE, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 03/22/2017 is 310.71 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


                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
76.7
118
160
257
454
889
1,610
2,280
5,960
 
90
February
82.6
162
211
323
578
1,040
1,740
2,360
4,810
 
90
March
85.4
240
306
470
765
1,390
2,360
3,120
7,010
 
90
April
138
240
273
374
633
1,100
1,940
2,490
6,190
 
90
May
115
172
205
289
487
844
1,440
1,980
5,750
 
90
June
72.7
111
129
163
237
406
849
1,570
6,820
 
90
July
53.6
79.9
90.2
112
143
224
425
682
6,970
 
90
August
48.3
69.6
76.9
91.9
122
195
412
684
4,710
 
90
September
45.0
62.3
68.0
80.3
102
164
402
822
4,250
 
90
October
42.7
66.0
73.6
87.4
114
217
584
1,030
2,940
 
89
November
51.0
75.7
85.0
103
173
388
864
1,260
9,080
 
90
December
63.0
89.9
102
182
348
695
1,340
1,820
4,930
 
90
 
       

The current 7-day running-average value for 03/22/2017 is 310.71 cubic feet per second.

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

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