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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-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 14-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 14-day running-average value for 03/22/2017 is 192.64 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 14-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
29.4
39.7
56.6
103
176
269
384
480
1,120
 
60
February
31.4
73.8
92.1
146
229
340
480
609
2,220
 
60
March
51.2
93.0
132
177
250
374
560
671
1,170
 
60
April
66.5
104
120
164
229
315
456
561
1,190
 
60
May
57.4
78.4
90.4
116
169
261
365
436
773
 
60
June
34.0
49.2
55.1
68.2
95.7
182
290
360
640
 
60
July
28.7
38.4
41.9
52.0
72.4
104
191
268
619
 
60
August
27.0
34.4
38.3
45.2
63.2
101
179
217
707
 
60
September
25.5
30.1
32.4
39.4
51.5
68.1
96.7
128
453
 
60
October
27.1
31.3
34.7
39.9
50.7
70.9
123
172
662
 
59
November
27.6
32.5
35.2
40.4
57.9
105
174
239
970
 
61
December
29.1
35.4
39.4
54.6
103
204
312
356
900
 
61
 
       

The current 14-day running-average value for 03/22/2017 is 192.64 cubic feet per second.

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

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