05083500 RED RIVER OF THE NORTH AT OSLO, MN

List Of Figures:

Annual mean discharge
Annual flow duration

LOCATION.--Lat 48°11'40'', long 97°08'30", in SW1/4SW1/4 sec.36, T.155 N., R.51 W., Walsh County, Hydrologic Unit 09020306, on bridge crossing the Red River 0.5 mi west of Oslo, Minn.
DRAINAGE AREA.--31,200 mi2, approximately, including 3,800 mi2 in closed basins.
PERIOD OF RECORD.--1936 to 1937, 1941 to 1943, 1945 to 1960, 1974 to 1976, operated as a continuous-record gaging station; 1985 to current, operated as a crest-stage station.
GAGE.--Wire-weight gage. Datum of gage is 772.65 ft above mean sea level, datum of 1929. Prior to Apr. 2, 1948, staff gage on railroad bridge 200 ft upstream and Apr. 3, 1948, to Sept. 8, 1959, wire-weight gage at bridge 620 ft downstream, both at datum 5.00 ft higher.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 63,000 ft3/s, May 10, 1950, gage height, 31.83 ft, site and datum then in use; maximum gage height, 36.72 ft, Apr. 14, 1989; no flow at times.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage known, about 37.5 ft in 1897, present datum.

Annual mean discharge

Annual mean discharge for 05083500 Red River of the North at Oslo, Minnesota

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                              Statistics of monthly and annual mean discharges
__________________________________________________________________________________________________________

                  Maximum                  Minimum                              Mean
           ______________________   ______________________   _____________________________________________

                       Water year               Water year              Standard    Coeffi-    Percentage
 Month     Discharge       of       Discharge       of       Discharge  deviation   cient of   of annual
            (ft3/s)    occurrence    (ft3/s)    occurrence    (ft3/s)    (ft3/s)    variation   discharge
__________________________________________________________________________________________________________

October      3,770     1974            13.8      1937         2,020       1,550       0.77       5.14
November     2,440     1974            2,020     1975         2,270       222         0.10       5.79
December     1,940     1974            1,240     1975         1,650       368         0.22       4.22
January      1,740     1974            1,300     1975         1,580       244         0.15       4.03
February     1,680     1976            1,430     1975         1,590       139         0.09       4.06
March        3,310     1976            1,730     1975         2,350       837         0.36       6.00
April        27,000    1950            1,520     1937         9,710       6,700       0.69       24.8
May          40,900    1950            1,430     1958         6,780       8,540       1.26       17.3
June         11,800    1950            286       1936         4,150       3,090       0.74       10.6
July         25,600    1975            92.9      1936         4,560       5,790       1.27       11.6
August       3,170     1949            31.2      1936         1,630       1,040       0.64       4.16
September    2,240     1975            18.9      1936         904         808         0.89       2.31
Annual       6,700     1975            2,480     1976         4,690       2,120       0.45       100
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Annual flow duration

Annual flow duration for for 05083500 Red River of the North at Oslo, Minnesota

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                                     Monthly and annual flow duration, in cubic feet per second
                                                 [ng, statistic not given]
_________________________________________________________________________________________________________________________________

 Percentage
  of days
 discharge     Jan.     Feb.     March    April     May       June      July      Aug.     Sept.    Oct.      Nov.    Dec.   Annual
 equaled or
  exceeded
____________________________________________________________________________________________________________________________________

  95           1,250    1,420    1,450    1,090     1,160     528       141       33.6     15.5     12.7     1,290    1,180    1,030
  90           1,290    1,420    1,500    1,720     1,490     1,130     1,060     473      21.5     13.4     1,600    1,200    1,230
  85           1,310    1,430    1,550    2,160     1,730     1,530     1,280     558      270      14.2     1,690    1,210    1,360
  80           1,320    1,440    1,600    2,460     2,070     1,770     1,450     648      358      15.0     1,790    1,230    1,480
  75           1,360    1,460    1,660    2,880     2,370     1,950     1,580     730      387      21.0     1,880    1,310    1,580
  70           1,380    1,470    1,730    3,290     2,620     2,130     1,710     842      417      1,720    2,000    1,370    1,670
  65           1,610    1,500    1,800    3,650     2,910     2,340     1,910     926      450      1,960    2,120    1,610    1,760
  60           1,680    1,510    1,870    4,450     3,200     2,560     2,130     994      483      2,040    2,220    1,740    1,860
  55           1,690    1,510    1,940    5,100     3,490     2,780     2,440     1,140    530      2,100    2,280    1,760    1,950
  50           1,690    1,620    2,000    5,780     3,810     3,040     2,750     1,490    586      2,160    2,330    1,780    2,090
  45           1,700    1,660    2,080    6,930     4,250     3,270     3,050     1,740    686      2,230    2,390    1,780    2,220
  40           1,700    1,680    2,150    8,590     4,760     3,460     3,390     1,970    798      2,290    2,450    1,790    2,360
  35           1,700    1,680    2,230    10,300    5,390     3,650     3,790     2,120    852      2,350    2,500    1,800    2,500
  30           1,710    1,690    2,300    11,400    6,250     3,960     4,290     2,260    905      2,510    2,560    1,800    2,840
  25           1,710    1,690    2,370    12,800    7,160     4,430     4,930     2,410    1,670    2,890    2,610    1,810    3,310
  20           1,720    1,700    2,430    15,400    8,370     5,230     5,680     2,560    1,860    3,180    2,730    1,910    4,220
  15           1,740    1,730    2,490    19,200    9,980     7,660     6,610     2,760    2,040    3,470    2,860    1,970    6,120
  10           1,760    ng       2,550    23,600    12,000    9,650     8,050     3,140    2,190    3,840    2,990    2,000    10,800
  5            ng       ng       4,820    30,800    27,600    13,200    14,300    3,550    2,340    4,210    ng       2,070    23,100
____________________________________________________________________________________________________________________________________

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                      Probability of occurrence of annual high discharges
                                  [ng, statistic not given]
__________________________________________________________________________________________________

                                                       Maximum mean discharge
                                                              (ft3/s)
                                       ___________________________________________________________

             Recurrence     Maximum
Exceedance    interval   instantaneous  3-day period  7-day period  15-day period  30-day period
probability    (years)      (ft3/s)
__________________________________________________________________________________________________

  0.99         1.01         2,990       ng            ng            ng             ng
  0.95         1.05         5,440       ng            ng            ng             ng
  0.90         1.11         7,320       ng            ng            ng             ng
  0.80         1.25         10,300      ng            ng            ng             ng
  0.50         2            18,600      ng            ng            ng             ng
  0.20         5            31,400      ng            ng            ng             ng
  0.10         10           40,100      ng            ng            ng             ng
  0.04         25           51,000      ng            ng            ng             ng
  0.02         50           59,000      ng            ng            ng             ng
  0.01         100          66,700      ng            ng            ng             ng
  0.005        200          74,300      ng            ng            ng             ng
  0.002        500          84,000      ng            ng            ng             ng
___________________________________________________________________________________________________

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                    Probability of occurrence of annual low discharges
                                [ng, statistic not given]    
____________________________________________________________________________________

                                     Minimum mean discharge (ft3/s)
                    ________________________________________________________________

                                       Number of consecutive days
                    ________________________________________________________________

Non-       Recur-
exceed-    rence
ance       inter-   1     3     7     14    30    60    90    120   183
prob-       val
ability   (years)
____________________________________________________________________________________

0.05       20       ng    ng    ng    ng    ng    ng    ng    ng    ng
0.10       10       ng    ng    ng    ng    ng    ng    ng    ng    ng
0.20       5        ng    ng    ng    ng    ng    ng    ng    ng    ng
0.50       2        ng    ng    ng    ng    ng    ng    ng    ng    ng
____________________________________________________________________________________

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                   Probability of occurrence of seasonal low discharges
                               [ng, statistic not given]
_____________________________________________________________________________________

                                         Minimum mean discharge (ft3/s)
                            _________________________________________________________

                                           Number of consecutive days
                            _________________________________________________________

   Non-       Recurrence
exceedance     interval     1       7       14      30         1     7      14   30
probability    (years)
_____________________________________________________________________________________

                            December-January-February            March-April-May
                            __________________________       _________________________

0.05           20           ng      ng      ng      ng         ng    ng    ng    ng
0.10           10           ng      ng      ng      ng         ng    ng    ng    ng
0.20           5            ng      ng      ng      ng         ng    ng    ng    ng
0.50           2            ng      ng      ng      ng         ng    ng    ng    ng

                                 June-July-August           September-October-November
                            __________________________       _________________________

0.05           20           73.5    78.5    87.3    93.8       ng    ng    ng    ng
0.10           10           171     185     205     229        ng    ng    ng    ng
0.20           5            392     426     473     546        ng    ng    ng    ng
0.50           2            1,130   1,220   1,340   1,630      ng    ng    ng    ng
_____________________________________________________________________________________


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               Annual peak discharge and corresponding gage height
                                 [--, no data]
_____________________________________________________________________________________

                     Gage     Peak                                Gage     Peak
Water    Date       height  discharge        Water    Date       height  discharge
year                (feet)   (ft3/s)         year                (feet)   (ft3/s)
_____________________________________________________________________________________

          Annual peak discharge, by year, and corresponding gage height

1936     April 18  --         15,000     1958    July 10     10.29    7,890
1937     May 4       6.47     4,070      1959    April 7     10.78    7,200
1942     April 4   --         12,500     1960    April 12  --         17,100
1943     April 13    29.16    31,500     1974    April 19  --         133,000
1945     March 26  --         24,000     1975    April 23  --         142,500
1946     March 30    25.11  --           1976    April 5   --         123,200
1947     April 22  --         33,800     1985    May 20      24.43    17,800
1948     April 17  --         41,400     1986    April 3     34.20    30,000
1949     April 10    24.08    18,700     1987    March 30    31.76    18,500
1950     May 10      31.83    63,000     1988    April 6     20.10    11,500
1951     April 12    25.46    24,800     1989    April 14    36.72    33,500
1952     April 21  --         24,800     1990    April 5     15.64    4,900
1953     June 25     17.55    14,900     1991    July 10     12.04    5,200
1954     April 15    12.39    9,790      1992    March 15    22.47    8,200
1955     April 10    19.46    16,400     1993    April 7   --         28,100
1956     April 24    25.50    22,500     1994    July 13     30.86    26,600
1957     July 2      17.42    14,900

Annual peak dischsrge, from highest to lowest, and corresponding gage height

1950     May 10      31.83    63,000     1985    May 20      24.43    17,800
1975     April 23  --         142,500    1960    April 12  --         17,100
1948     April 17  --         41,400     1955    April 10    19.46    16,400
1947     April 22  --         33,800     1936    April 18  --         15,000
1989     April 14    36.72    33,500     1953    June 25     17.55    14,900
1974     April 19  --         133,000    1957    July 2      17.42    14,900
1943     April 13    29.16    31,500     1942    April 4   --         11,900
1986     April 3     34.20    30,000     1988    April 6     20.10    11,500
1993     April 7   --         28,100     1954    April 15    12.39    9,790
1994     July 13     30.86    26,600     1992    March 15    22.47    8,200
1951     April 12    25.46    24,800     1958    July 10     10.29    7,890
1952     April 21  --         24,800     1959    April 7     10.78    7,200
1945     March 26  --         24,000     1991    July 10     12.04    5,200
1976     April 5   --         123,200    1990    April 5     15.64    4,900
1956     April 24    25.50    22,500     1937    May 4       6.47     4,070
1949     April 10    24.08    18,700     1946    March 30    25.11  --
1987     March 30    31.76    18,500
_____________________________________________________________________________________
1Daily mean.

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                             Monthly and annual mean discharges, in cubic feet per second
          [Data were not rounded in accordance with U.S. Geological Survey publication standards; --, no data]
__________________________________________________________________________________________________________________________________

Year    Oct.    Nov.    Dec.     Jan.     Feb.     March      April     May       June      July      Aug.     Sept.    Annual
__________________________________________________________________________________________________________________________________

1936  --       --       --       --       --       --         5,111     1,634     286.4     92.9      31.2     18.9   --
1937    13.8   --       --       --       --       --         1,521     1,715     935.2   --        --       --       --
1941  --       --       --       --       --       --       --        --        --        --        --       --       --
1942  --       --       --       --       --       --         6,819     6,405   --          1,695   --       --       --
1943  --       --       --       --       --       --       --        --        --        --        --       --       --

1945  --       --       --       --       --       --         12,910    5,982     3,314     --      --       --       --
1946  --       --       --       --       --       --         10,230    3,471     2,074     --      --       --       --
1947  --       --       --       --       --       --       --          7,775     10,690    4,502   --       --       --
1948  --       --       --       --       --       --       --          8,278     2,508   --        --       --       --
1949  --       --       --       --       --       --       --          2,791     5,193     3,400     3,171  --       --

1950  --       --       --       --       --       --         27,050    40,940    11,750    7,936   --       --       --
1951  --       --       --       --       --       --         15,340    8,444     4,310   --        --       --       --
1952  --       --       --       --       --       --         17,260    5,556     3,604     5,762     2,033  --       --
1953  --       --       --       --       --       --         3,266     3,068     9,069     4,738     2,124  --       --
1954  --       --       --       --       --       --         4,967     3,583     3,336     2,167   --       --       --

1955  --       --       --       --       --       --         6,010     1,826     2,424     2,219     1,625  --       --
1956  --       --       --       --       --       --         9,280     5,602     2,979     1,479     763.1  --       --
1957  --       --       --       --       --       --         4,573     3,271     4,363     6,140     2,470  --       --
1958  --       --       --       --       --       --         2,686     1,433     1,359     3,739     915.4    427.8  --
1959  --       --       --       --       --       --         3,496     1,696     2,530     1,972     724.0    499.3  --

1960  --       --       --       --       --       --         9,289     3,328     2,699     1,954     541.1    607.0  --
1974    3,768    2,443    1,945    1,735    1,654    2,023    17,290    13,940    6,293     3,000     2,742    1,813    4,891
1975    1,944    2,020    1,240    1,299    1,431    1,732    17,610    15,830    5,887     25,590    3,087    2,243    6,699
1976    2,335    2,350    1,773    1,707    1,685    3,306    9,705     2,625     1,546     1,125     993.2    716.8    2,481
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