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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-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 2007.
REGULATION.--No known regulation.
GAGE OPERATION.--U.S. Geological Survey, Virginia Water Science Center.
     Duration Plot with 7-Day Average Streamflow Conditions
Provisional Data Subject to Revision 03170000 plot. LITTLE RIVER AT GRAYSONTOWN, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 08/28/2008 is 120.29 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 7-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
86.9
120
145
220
331
477
734
921
2,120
 
79
February
71.0
141
172
280
395
570
795
992
2,380
 
79
March
66.0
198
236
326
447
624
908
1,140
2,710
 
79
April
117
220
238
290
414
598
900
1,140
2,790
 
79
May
110
187
208
257
361
489
635
807
2,250
 
79
June
73.1
130
157
215
293
408
578
733
2,680
 
79
July
56.7
101
122
173
235
310
427
576
2,080
 
79
August
32.0
84.5
102
145
200
271
387
562
4,480
 
79
September
46.3
82.3
99.5
128
176
246
453
691
2,330
 
79
October
66.3
95.1
108
138
190
311
536
792
2,820
 
78
November
83.0
116
132
165
227
350
534
664
2,480
 
79
December
90.0
121
137
190
280
396
548
711
2,270
 
79
 
       

The current 7-day running-average value for 08/28/2008 is 120.29 cubic feet per second.

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

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