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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 7-Day Average Streamflow
 
01673800 PO RIVER NEAR SPOTSYLVANIA, VA
LOCATION.--Latitude 38°10'17", Longitude 77°35'42", North American Datum of 1927,
                    Spotsylvania County, VA, Hydrologic Unit 02080105.
DRAINAGE AREA.--77.6 square miles.
PERIOD OF RECORD.--October 1962 to current year.
DURATION STATISTIC COMPUTATION PERIOD.--All data through September 2007.
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 01673800 plot. PO RIVER NEAR SPOTSYLVANIA, VA
Provisional Data Subject to Revision

                    

The current 7-day running-average value for 08/27/2008 is 1.91 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


                01673800     PO RIVER NEAR SPOTSYLVANIA, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
6.36
14.6
21.6
44.0
79.4
128
219
331
865
 
45
February
6.14
22.3
32.4
50.9
81.3
136
246
401
1,310
 
45
March
5.83
31.4
39.1
56.8
94.9
168
281
434
1,360
 
45
April
11.3
26.8
32.8
46.0
77.4
143
292
364
1,360
 
45
May
4.23
13.6
17.4
27.7
47.7
90.5
165
237
630
 
45
June
0.87
3.80
6.07
11.3
25.9
48.7
107
189
1,900
 
45
July
0.06
1.04
1.93
4.61
11.1
28.0
60.1
98.4
515
 
45
August
0.00
0.36
0.85
2.24
7.50
23.4
62.1
95.8
834
 
45
September
0.05
0.26
0.52
1.20
4.61
14.7
49.0
106
1,030
 
45
October
0.06
0.26
0.69
3.49
10.8
37.0
113
212
968
 
44
November
0.19
2.09
5.27
12.3
29.0
72.6
159
249
1,150
 
45
December
1.72
9.70
11.9
30.3
58.0
107
195
288
1,180
 
45
 
       

The current 7-day running-average value for 08/27/2008 is 1.91 cubic feet per second.

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

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