USGS - science for a changing world
Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
02054500 ROANOKE RIVER AT LAFAYETTE, VA
LOCATION.--Latitude 3714'11", Longitude 8012'34", North American Datum of 1927,
                    Montgomery County, VA, Hydrologic Unit 03010101
DRAINAGE AREA.--254 square miles.
PERIOD OF RECORD.--September 1943 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--Diurnal fluctuation by plant for unknown years.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.

     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision
02054500 plot. 
ROANOKE RIVER AT LAFAYETTE, VA
Provisional Data Subject to Revision

                    

The current daily value for 02/23/2017 is 145.0 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


                02054500     ROANOKE RIVER AT LAFAYETTE, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
10.0
49.0
60.0
112
186
324
570
819
6,360
 
72
February
23.0
67.0
84.0
142
250
427
723
1,020
7,190
 
72
March
30.0
90.0
119
201
313
491
840
1,280
6,570
 
72
April
63.0
103
122
173
261
445
710
1,060
8,260
 
72
May
57.0
83.0
96.0
134
198
305
542
805
5,340
 
72
June
28.0
49.0
60.0
87.0
120
185
323
506
11,700
 
72
July
23.0
39.0
45.0
60.0
83.0
121
200
295
6,170
 
72
August
14.0
32.0
36.3
49.0
66.0
102
174
252
6,350
 
72
September
14.0
32.0
36.0
45.0
59.5
91.0
182
308
7,420
 
72
October
24.0
33.0
38.0
50.0
68.0
114
220
375
4,600
 
72
November
28.0
41.0
47.0
60.0
89.0
162
321
498
6,840
 
72
December
24.0
43.0
50.0
78.2
138
249
460
655
5,760
 
72
 
       
Instantaneous minimum flow for period of record = 8.00 cubic feet per second.

The current daily value for 02/23/2017 is 145.0 cubic feet per second.

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

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://va.water.usgs.gov/duration_plots/daily/dp02054500.htm
Page Contact Information: Virginia WSC Webmaster
Page Last Modified: 6/19/2016