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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-Day Average Streamflow
 
03471500 SOUTH FORK HOLSTON RIVER AT RIVERSIDE, NEAR CHILHOWIE, VA
LOCATION.--Latitude 36°45'37", Longitude 81°37'53", North American Datum of 1927,
                    Smyth County, VA, Hydrologic Unit 06010102.
DRAINAGE AREA.--76.6 square miles.
PERIOD OF RECORD.--October 1920 to December 1931, July 1942 to current year. Monthly discharge only for some periods, published in WSP 1306. Prior to October 1924, published as "near Chilhowie." June 1907 to December 1909, at site 4.5 mi downstream also published as "near Chilhowie"; records not equivalent.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Some diurnal fluctuation caused by mill prior to 1951.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 03471500 plot. SOUTH FORK HOLSTON RIVER AT RIVERSIDE, NEAR CHILHOWIE, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 03/22/2017 is 101.43 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


                03471500     SOUTH FORK HOLSTON RIVER AT RIVERSIDE, NEAR CHILHOWIE, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
22.4
32.5
46.1
77.5
120
181
252
332
671
 
84
February
29.1
54.4
71.4
104
158
237
330
407
1,180
 
84
March
41.5
73.5
89.2
131
183
246
347
433
679
 
84
April
46.7
71.9
86.2
111
156
220
306
367
792
 
84
May
41.9
57.8
67.1
88.9
123
174
239
287
552
 
84
June
25.2
38.4
43.4
53.9
79.0
118
176
231
559
 
84
July
19.9
27.6
31.0
38.7
51.4
74.6
120
185
382
 
84
August
16.9
25.1
27.2
32.3
42.0
65.7
105
160
420
 
84
September
17.5
22.0
23.2
26.8
33.1
44.9
70.3
108
450
 
85
October
18.0
21.2
22.6
25.3
33.3
48.8
89.8
140
545
 
84
November
16.4
22.8
24.6
28.9
42.3
72.9
122
160
728
 
85
December
18.8
25.5
28.8
41.9
75.0
143
206
238
448
 
85
 
       

The current 14-day running-average value for 03/22/2017 is 101.43 cubic feet per second.

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

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