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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
03474000 MIDDLE FORK HOLSTON RIVER AT SEVEN MILE FORD, VA
LOCATION.--Latitude 36°48'26", Longitude 81°37'20", North American Datum of 1927,
                    Smyth County, VA, Hydrologic Unit 06010102.
DRAINAGE AREA.--132 square miles.
PERIOD OF RECORD.--July 1942 to December 1981, October 1987 to September 1989, October 1996 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Some diurnal fluctuation at low flow caused by mill 9 miles above station, prior to April 1977. Since May 1936, flow occasionally regulated by the filling and draining of Hungry Mother Lake on Hungry Mother Creek, capacity about 1,600 ac ft.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision 03474000 plot. MIDDLE FORK HOLSTON RIVER AT SEVEN MILE FORD, VA
Provisional Data Subject to Revision

                    

The current daily value for 03/22/2017 is 174.0 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


                03474000     MIDDLE FORK HOLSTON RIVER AT SEVEN MILE FORD, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
22.0
37.0
48.1
84.2
143
247
445
657
5,020
 
60
February
30.0
64.8
79.0
116
190
314
554
781
3,370
 
60
March
45.0
83.0
106
144
207
341
560
792
5,720
 
60
April
59.0
87.0
100
126
174
277
448
620
5,990
 
60
May
49.0
66.0
73.0
92.0
132
204
355
546
3,610
 
60
June
29.0
42.0
48.0
59.0
79.0
127
232
363
2,670
 
60
July
22.0
35.0
38.0
48.0
64.0
92.0
152
251
3,700
 
60
August
20.0
31.0
34.0
41.0
55.0
82.0
138
214
2,290
 
60
September
20.0
28.0
30.0
37.0
46.0
64.0
95.0
138
3,130
 
60
October
21.0
29.0
31.0
37.0
46.0
66.0
110
158
2,050
 
61
November
21.0
31.0
34.0
40.0
57.0
101
187
276
5,480
 
61
December
22.0
33.0
37.0
53.0
99.0
194
335
486
3,920
 
61
 
       
Instantaneous minimum flow for period of record = 9.00 cubic feet per second.

The current daily value for 03/22/2017 is 174.0 cubic feet per second.

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

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