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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
03170000 LITTLE RIVER AT GRAYSONTOWN, VA
LOCATION.--Latitude 3702'15", Longitude 8033'25", 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 Daily Streamflow Conditions
Provisional Data Subject to Revision
03170000 plot. 
LITTLE RIVER AT GRAYSONTOWN, VA
Provisional Data Subject to Revision

                    

The current daily value for 03/22/2017 is 242.0 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily


      Duration Table of Daily 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
71.0
112
138
200
308
442
667
954
9,000
 
87
February
60.0
135
168
250
366
520
772
1,080
6,300
 
87
March
60.0
191
229
306
416
568
886
1,300
6,440
 
87
April
110
205
228
279
390
542
810
1,140
8,090
 
87
May
103
173
192
245
344
472
645
845
5,860
 
87
June
68.0
118
139
199
276
373
541
735
10,000
 
87
July
51.0
94.0
110
160
218
300
440
596
6,170
 
87
August
31.0
76.9
95.0
129
181
250
375
544
8,470
 
87
September
40.0
78.0
93.0
122
165
230
411
599
9,330
 
87
October
59.0
85.0
101
132
180
274
452
680
13,200
 
87
November
65.0
111
128
157
215
330
497
687
8,020
 
87
December
57.0
110
130
177
267
381
558
739
6,260
 
87
 
       
Instantaneous minimum flow for period of record = 21.0 cubic feet per second.

The current daily value for 03/22/2017 is 242.0 cubic feet per second.

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

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