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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 2007.
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 08/27/2008 is 55.71 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
139
164
249
351
463
578
671
1,060
 
79
February
102
163
195
306
419
541
681
794
1,100
 
79
March
116
228
265
348
485
611
792
888
1,290
 
79
April
142
239
261
338
490
680
833
987
1,500
 
79
May
127
222
241
297
398
524
700
819
1,490
 
79
June
98.0
171
192
250
333
448
575
661
981
 
79
July
84.3
120
137
189
258
345
487
603
1,200
 
79
August
50.5
108
129
164
219
292
389
481
1,730
 
79
September
53.9
95.2
112
142
204
271
440
555
1,880
 
79
October
73.8
97.5
113
145
193
302
525
829
1,550
 
78
November
86.0
116
137
168
229
360
541
707
1,070
 
79
December
95.8
130
146
187
284
408
563
657
948
 
79
 
       

The current 28-day running-average value for 08/27/2008 is 55.71 cubic feet per second.

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

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