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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 3815'42", Longitude 7851'44", 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 2015.
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 02/25/2017 is 137.0 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


                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
78.0
91.0
150
250
435
800
1,100
12,400
 
88
February
42.0
97.0
120
193
308
518
839
1,230
7,710
 
88
March
45.0
136
166
254
388
650
1,100
1,650
14,600
 
88
April
83.0
130
156
216
318
523
886
1,230
10,800
 
88
May
61.0
109
129
175
256
384
617
877
7,840
 
88
June
29.0
78.0
90.0
127
178
257
412
650
12,700
 
88
July
21.0
61.0
74.0
102
138
188
278
390
2,300
 
88
August
22.0
53.0
65.0
89.0
118
163
303
476
10,300
 
88
September
18.0
56.0
64.0
81.0
107
159
307
552
21,700
 
88
October
34.0
62.0
68.0
86.0
109
175
362
618
12,100
 
88
November
28.0
67.0
78.0
94.0
132
232
450
709
26,000
 
88
December
41.0
72.0
83.0
110
200
339
625
914
11,000
 
88
 
       
Instantaneous minimum flow for period of record = 8.90 cubic feet per second.

The current daily value for 02/25/2017 is 137.0 cubic feet per second.

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

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