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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-Day Average 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 28-Day Average 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 28-day running-average value for 03/22/2017 is 253.5 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


                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
31.1
43.8
55.5
98.8
169
258
348
416
774
 
60
February
34.8
89.0
106
160
224
317
426
522
1,330
 
60
March
57.8
122
150
194
258
372
474
547
950
 
60
April
74.1
122
156
194
249
355
437
497
842
 
60
May
70.0
91.4
108
141
199
270
358
404
652
 
60
June
38.6
57.8
64.5
82.8
118
205
288
326
526
 
60
July
31.1
41.3
45.3
56.1
78.0
144
217
265
420
 
60
August
27.9
37.3
40.4
50.1
67.4
111
167
208
427
 
60
September
27.6
32.1
34.2
41.1
54.7
75.6
104
121
268
 
60
October
28.4
34.1
36.7
41.6
52.1
71.9
117
170
398
 
58
November
29.0
33.1
35.8
40.0
56.9
97.5
165
203
614
 
61
December
29.8
35.5
39.8
50.9
98.1
197
262
316
651
 
61
 
       

The current 28-day running-average value for 03/22/2017 is 253.5 cubic feet per second.

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

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