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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 28-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 28-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02070000 plot. NORTH MAYO RIVER NEAR SPENCER, VA
Provisional Data Subject to Revision

                    

The current 28-day running-average value for 03/22/2017 is 72.07 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 28-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
40.4
66.3
74.5
94.2
131
168
210
244
383
 
86
February
40.7
71.4
78.8
101
136
174
234
276
413
 
86
March
52.0
81.2
91.3
113
143
195
268
312
514
 
86
April
53.6
85.4
93.3
114
145
205
286
328
549
 
86
May
51.2
71.5
80.4
96.0
125
177
217
272
551
 
86
June
20.2
58.4
65.9
83.0
112
151
202
256
492
 
86
July
16.6
44.3
50.7
66.2
94.9
135
181
226
563
 
86
August
11.3
34.5
40.8
57.2
86.3
116
164
187
481
 
86
September
13.4
31.6
38.2
54.2
77.2
114
178
247
491
 
86
October
24.5
33.5
43.5
55.0
76.9
117
211
307
543
 
84
November
26.1
43.2
51.9
63.7
82.3
123
169
230
500
 
86
December
30.6
51.0
60.0
76.0
104
141
184
214
378
 
86
 
       

The current 28-day running-average value for 03/22/2017 is 72.07 cubic feet per second.

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

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