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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-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 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 03170000 plot. LITTLE RIVER AT GRAYSONTOWN, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 03/22/2017 is 246.36 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


                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
90.4
127
160
230
337
490
674
799
1,420
 
87
February
89.8
148
176
280
406
554
783
958
1,490
 
87
March
85.3
206
243
348
461
626
842
980
1,780
 
87
April
121
232
252
306
441
648
874
1,060
2,280
 
87
May
113
199
223
276
390
508
678
788
1,900
 
87
June
82.0
145
167
231
313
432
571
735
1,670
 
87
July
67.9
108
127
178
237
314
448
609
1,650
 
87
August
38.5
89.9
112
150
212
278
401
534
2,570
 
87
September
58.4
86.5
107
134
182
264
448
628
1,770
 
87
October
65.5
92.4
104
141
192
309
527
757
1,840
 
86
November
72.4
116
133
168
226
346
550
691
1,530
 
87
December
91.1
128
142
190
287
413
573
694
1,320
 
87
 
       

The current 14-day running-average value for 03/22/2017 is 246.36 cubic feet per second.

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

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