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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-Day Average Streamflow
 
02070000 NORTH MAYO RIVER NEAR SPENCER, VA
LOCATION.--Latitude 36°34'05", Longitude 79°59'15", North American Datum of 1927,
                    Henry County, VA, Hydrologic Unit 03010103.
DRAINAGE AREA.--108 square miles.
PERIOD OF RECORD.--October 1928 to current year. Monthly discharge only for some periods, published in WSP 1303.
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 02070000 plot. NORTH MAYO RIVER NEAR SPENCER, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 03/22/2017 is 70 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


                02070000     NORTH MAYO RIVER NEAR SPENCER, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
39.0
60.1
68.5
87.6
115
165
264
347
961
 
86
February
41.4
63.7
73.4
92.6
122
169
248
331
809
 
86
March
46.3
75.3
85.4
104
134
193
296
375
1,060
 
86
April
42.7
76.2
81.1
97.9
127
186
289
372
962
 
86
May
34.0
62.6
70.3
84.7
111
156
216
270
741
 
86
June
12.6
47.9
55.4
70.6
102
135
201
264
1,260
 
86
July
12.5
38.9
43.3
58.0
84.9
115
178
249
860
 
86
August
6.39
27.9
36.1
50.1
76.3
106
154
222
1,470
 
86
September
11.5
28.4
35.3
49.4
69.1
93.0
157
264
1,600
 
86
October
19.7
33.1
41.0
53.6
71.0
102
193
310
1,540
 
85
November
27.4
45.6
50.1
63.2
80.1
114
168
226
1,090
 
86
December
30.9
52.3
60.5
73.4
102
144
207
256
613
 
86
 
       

The current 7-day running-average value for 03/22/2017 is 70 cubic feet per second.

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

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