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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-Day Average Streamflow
 
03170000 LITTLE RIVER AT GRAYSONTOWN, VA
LOCATION.--Latitude 37°02'15", Longitude 80°33'25", North American Datum of 1927,
                    Pulaski County, VA, Hydrologic Unit 05050001.
DRAINAGE AREA.--309 square miles.
PERIOD OF RECORD.--October 1928 to current year. Published as "at Graysonton" prior to October 1990.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--No known regulation.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with 28-Day Average Streamflow Conditions
Provisional Data Subject to Revision 03170000 plot. LITTLE RIVER AT GRAYSONTOWN, VA
Provisional Data Subject to Revision

                    

The current 28-day running-average value for 03/22/2017 is 265.43 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


                03170000     LITTLE RIVER AT GRAYSONTOWN, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
107
142
172
241
348
465
590
681
1,060
 
87
February
102
159
192
296
412
543
700
808
1,100
 
87
March
116
221
258
345
475
610
783
882
1,290
 
87
April
142
240
261
338
483
673
825
970
1,500
 
87
May
127
223
244
300
412
533
712
811
1,490
 
87
June
98.0
169
191
254
339
455
588
674
981
 
87
July
84.3
117
136
190
255
344
495
656
1,200
 
87
August
50.5
104
128
162
217
291
394
486
1,730
 
87
September
53.9
92.3
111
142
202
271
424
533
1,880
 
87
October
73.8
95.7
110
145
194
288
494
787
1,550
 
86
November
80.2
113
136
169
226
348
533
671
1,070
 
87
December
93.6
130
144
183
288
412
583
667
948
 
87
 
       

The current 28-day running-average value for 03/22/2017 is 265.43 cubic feet per second.

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

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