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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-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 28-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 28-day running-average value for 03/22/2017 is 130.25 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


                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
23.8
33.0
46.3
79.2
120
174
237
267
406
 
84
February
31.4
62.1
79.9
112
158
215
281
369
724
 
84
March
46.2
85.4
106
139
184
254
313
349
553
 
84
April
51.1
83.1
101
129
177
236
302
350
596
 
84
May
44.7
66.7
77.9
105
139
184
235
274
584
 
84
June
30.3
45.3
50.4
65.0
97.7
136
184
219
370
 
84
July
22.1
29.4
33.3
42.4
57.2
86.3
152
186
332
 
84
August
17.4
26.0
28.2
34.9
45.6
68.2
108
147
249
 
84
September
17.3
23.4
24.8
28.0
35.0
50.7
79.7
115
268
 
85
October
18.7
21.7
23.1
25.2
34.5
47.7
94.9
125
354
 
84
November
17.1
22.6
24.4
27.8
41.7
72.1
107
138
455
 
85
December
18.1
25.0
28.4
39.6
75.1
132
175
197
439
 
85
 
       

The current 28-day running-average value for 03/22/2017 is 130.25 cubic feet per second.

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

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