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Virginia DEQ

Virginia Water Science Center

 
  Duration Plot and Table of 14-Day Average Streamflow
 
02037500 JAMES RIVER NEAR RICHMOND, VA
LOCATION.--Latitude 37°33'47", Longitude 77°32'50", North American Datum of 1927,
                    Henrico County, VA, Hydrologic Unit 02080205.
DRAINAGE AREA.--6,753 square miles.
PERIOD OF RECORD.--October 1934 to current year. Gage-height records collected in vicinity of Mayo's Bridge, at mile 109.5, 1876-1956, and at mile 108.7 since 1957, are contained in reports of the National Weather Service.
DURATION STATISTIC COMPUTATION PERIOD.--October 1934 to June 1982.
REGULATION.--Regulation from upstream powerplants. Diversion through the Kanawha Canal. Flow augmented by summertime releases since June 1982.
GAGE OPERATION.--Virginia Department of Environmental Quality - Water Division.
     Duration Plot with 14-Day Average Streamflow Conditions
Provisional Data Subject to Revision 02037500 plot. JAMES RIVER NEAR RICHMOND, VA
Provisional Data Subject to Revision

                    

The current 14-day running-average value for 03/22/2017 is 3015.71 cubic feet per second.

  explanation   Percentile Description Duration Plot Description 28 Day 14 Day 7 Day Daily
      Duration Table of 14-Day Average Streamflow
            Flow values in cubic feet per second


                02037500     JAMES RIVER NEAR RICHMOND, VA

   Minimum daily flow
   5th percentile
 
   10th percentile
 
   25th percentile
 
 
   Median
 
 
   75th percentile
 
 
 
   90th percentile
 
 
 
   95th percentile
 
 
 
 
   Maximum daily flow
         
Years of record
January
422
1,100
2,050
4,390
7,040
11,200
18,000
21,700
35,200
 
48
February
427
2,100
3,460
5,280
9,240
14,400
19,700
23,100
33,900
 
48
March
2,230
3,850
5,080
7,140
10,500
15,400
21,700
27,100
53,000
 
48
April
1,520
3,530
4,240
6,070
9,020
14,800
21,800
25,600
44,000
 
48
May
1,120
2,630
3,050
3,890
6,400
9,580
14,100
18,500
36,000
 
48
June
564
1,400
1,690
2,730
4,170
6,890
10,700
16,900
61,200
 
47
July
25.9
653
833
1,370
2,560
3,580
5,990
9,870
63,200
 
47
August
20.0
234
432
1,030
2,010
3,440
8,030
15,400
40,900
 
47
September
14.3
140
229
657
1,530
3,090
8,840
14,200
40,900
 
47
October
22.2
105
285
893
1,600
3,660
8,960
19,900
33,000
 
47
November
114
520
838
1,370
2,380
5,530
9,410
12,300
34,100
 
48
December
373
821
1,170
2,240
4,430
7,780
11,600
19,900
44,300
 
48
 
       

The current 14-day running-average value for 03/22/2017 is 3015.71 cubic feet per second.

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

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