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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-Day Average Streamflow
 
02028500 ROCKFISH RIVER NEAR GREENFIELD, VA
LOCATION.--Latitude 37°52'10", Longitude 78°49'25", North American Datum of 1927,
                    Nelson County, VA, Hydrologic Unit 02080203.
DRAINAGE AREA.--94.8 square miles.
PERIOD OF RECORD.--April 1943 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2015.
REGULATION.--No known regulation.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.
     Duration Plot with 7-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02028500 plot. ROCKFISH RIVER NEAR GREENFIELD, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 03/22/2017 is 48.29 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


                02028500     ROCKFISH RIVER NEAR GREENFIELD, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
13.3
28.2
43.6
77.0
128
208
337
425
1,200
 
72
February
17.0
49.1
59.9
87.4
142
219
342
482
1,040
 
72
March
18.6
64.1
82.6
125
180
291
455
577
1,130
 
72
April
38.4
66.0
79.4
110
164
272
455
635
1,200
 
72
May
24.0
47.5
58.9
80.6
128
199
319
413
919
 
73
June
1.89
22.4
30.1
47.3
75.3
125
223
386
2,230
 
73
July
0.89
9.70
13.9
26.5
44.7
72.7
159
250
2,360
 
73
August
0.13
5.27
8.66
15.9
31.4
64.4
130
228
5,030
 
73
September
0.12
5.24
7.64
13.6
29.4
70.3
190
341
1,700
 
73
October
1.93
6.78
10.5
20.0
40.9
100
224
393
982
 
72
November
7.13
16.7
21.1
35.0
69.6
139
274
415
2,070
 
72
December
10.5
22.3
28.7
62.3
114
197
334
442
1,290
 
72
 
       

The current 7-day running-average value for 03/22/2017 is 48.29 cubic feet per second.

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

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