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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of Daily Streamflow
 
01625000 MIDDLE RIVER NEAR GROTTOES, VA
LOCATION.--Latitude 38°15'42", Longitude 78°51'44", North American Datum of 1927,
                    Augusta County, VA, Hydrologic Unit 02070005.
DRAINAGE AREA.--373 square miles.
PERIOD OF RECORD.--April 1927 to current year. Records for February 1925 to September 1926, published in WSP 601 and 621, are unreliable and should not be used.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2007.
REGULATION.--Some small diurnal fluctuation at low flow caused by mills upstream. Discharge includes discharges at treatment plants upstream, much of which is diverted from another drainage basin for industrial and municipal supply. Wastwater treatment upstream estimated input 6.4 cfs.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.
     Duration Plot with Daily Streamflow Conditions
Provisional Data Subject to Revision 01625000 plot. MIDDLE RIVER NEAR GROTTOES, VA
Provisional Data Subject to Revision

                    

The current daily value for 08/27/2008 is 60 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


                01625000     MIDDLE RIVER NEAR GROTTOES, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
42.0
76.0
91.0
161
254
443
804
1,100
12,400
 
80
February
42.0
95.0
123
200
317
528
850
1,260
7,710
 
80
March
45.0
139
166
252
384
640
1,100
1,660
14,600
 
80
April
83.0
127
153
213
315
522
891
1,240
10,800
 
80
May
61.0
106
126
171
248
372
591
828
7,840
 
80
June
29.0
76.0
89.0
125
176
256
412
653
12,700
 
80
July
21.0
60.0
74.0
103
139
189
286
402
2,300
 
80
August
22.0
53.0
65.0
89.0
118
167
323
500
10,300
 
80
September
18.0
56.0
64.0
82.0
109
162
321
573
21,700
 
80
October
34.0
62.0
68.0
87.0
111
185
390
660
12,100
 
80
November
28.0
65.0
77.9
95.0
135
243
478
718
26,000
 
80
December
41.0
70.0
82.0
109
201
336
600
884
11,000
 
80
 
       
Instantaneous minimum flow for period of record = 8.90 cubic feet per second.

The current daily value for 08/27/2008 is 60 cubic feet per second.

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

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