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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
02054530 ROANOKE RIVER AT GLENVAR, VA
LOCATION.--Latitude 3716'04", Longitude 8008'23", North American Datum of 1927,
                    Roanoke County, VA, Hydrologic Unit 03010101.
DRAINAGE AREA.--281 square miles.
PERIOD OF RECORD.--December 1991 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Withdrawn estimated 11.1 cfs, unknown years.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.

     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision
02054530 plot. 
ROANOKE RIVER AT GLENVAR, VA
Provisional Data Subject to Revision

                    

The current daily value for 02/23/2017 is 158.0 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


                02054530     ROANOKE RIVER AT GLENVAR, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
36.0
55.2
67.0
97.0
191
316
651
964
8,490
 
24
February
48.0
70.0
80.0
102
209
392
824
1,270
9,620
 
24
March
46.0
82.0
88.0
178
310
486
948
1,540
7,800
 
24
April
76.0
102
112
169
268
456
702
1,010
8,380
 
24
May
70.0
94.2
107
131
202
353
651
903
3,420
 
24
June
36.0
51.0
59.0
90.0
132
233
482
776
8,580
 
24
July
31.0
41.0
53.0
69.0
92.0
140
257
367
8,730
 
24
August
17.0
28.0
33.5
53.2
74.0
105
170
230
2,720
 
24
September
15.0
32.0
36.0
47.0
68.5
93.0
182
344
10,500
 
24
October
28.0
35.0
40.0
54.0
71.0
103
178
238
1,180
 
23
November
32.0
43.6
47.0
63.0
82.5
160
334
587
7,110
 
23
December
37.0
48.0
53.0
77.0
127
270
519
693
5,850
 
23
 
       
Instantaneous minimum flow for period of record = 15.0 cubic feet per second.

The current daily value for 02/23/2017 is 158.0 cubic feet per second.

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

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