05050500 BOIS DE SIOUX RIVER NEAR FAIRMOUNT, ND

List Of Figures:

Annual mean discharge
Annual flow duration

LOCATION.--Lat 46°03'00'', long 96°33'25", on line between secs.22 and 27, T.130 N., R.47 W., Richland County, Hydrologic Unit 09020101, at bridge on Minnesota Highway 55 and North Dakota Highway 11, 0.75 mi upstream from Minneapolis, St. Paul & Sault Ste. Marie Railway bridge, 2 mi east of Fairmount, 5 mi west of Tenny, Minn., and 15 mi downstream from Lake Traverse.
DRAINAGE AREA.--1,540 mi2, approximately.
PERIOD OF RECORD.--April 1919 to September 1944.
GAGE.--Chain gage. Datum of gage is 952.13 ft above sea level, adjustment of 1912. Prior to October 1919, staff gage at same site at datum 10.00 ft higher. Apr. 1, 1920, to Sept. 30, 1939, staff gage at site 0.75 mi downstream at datum 8.95 ft higher. Oct. 1, 1939, to Dec. 5, 1940, staff gage at present site at datum 10.00 ft higher.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 1,430 ft3/s, Apr. 4,1943; maximum gage height, 16.40 ft, Apr. 4, 1943; no flow at times in most years.

Annual mean discharge

Annual mean streamflow for 05050500 Bois de Sioux River near Fairmount, North Dakota 
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                              Statistics of monthly and annual mean discharges
                                    [m, more than 1 year of occurrence]
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                  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      57.4      1943          0         m              5.08        13.5        2.66       1.61
November     23.5      1921          0         m              1.83        5.01        2.73       0.58
December     14.8      1921          0         m              0.770       2.99        3.89       0.24
January      6.74      1921          0         m              0.270       1.35        5.00       0.09
February     8.64      1930          0         m              0.490       1.81        3.70       0.16
March        72.3      1943          0         m              11.7        19.6        1.67       3.72
April        625       1943          0         m              55.8        133         2.38       17.7
May          928       1943          0         m              73.4        191         2.60       23.3
June         726       1943          0         m              81.8        203         2.48       25.9
July         662       1942          0         m              56.1        149         2.66       17.8
August       208       1942          0         m              14.6        42.2        2.89       4.63
September    250       1942          0         m              13.5        49.3        3.66       4.27
Annual       233       1943          0         m              26.8        57.1        2.13       100
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Annual flow duration

Annual flow duration for 05050500 Bois de Sioux River near Fairmount, North Dakota 
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                              Monthly and annual flow duration, in cubic feet per second
______________________________________________________________________________________________________________________

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

  95           0.21    0.05    0.05    0       0       0       0.05    0       0       0       0       0       0
  90           0.42    0.11    0.05    0       0       0       0.05    0       0       0       0       0       0
  85           0.63    0.16    0.05    0       0       0       0.05    0       0       0       0       0       0
  80           0.83    0.21    0.05    0       0       0       0.05    0       0       0       0       0       0
  75           1.04    0.27    0.05    0       0       0       0.05    0       0       0       0       0       0
  70           1.25    0.32    0.05    0       0       0       0.05    0       0       0       0       0       0
  65           1.46    0.37    0.05    0       0       0       0.05    0       0       0       0       0       0
  60           1.67    0.43    0.05    0       0       0       0.05    0       0       0       0       0       0
  55           1.88    0.48    0.05    0.99    0       0       0.05    0       0       0       0       0       0
  50           2.08    0.53    0.05    1.80    0.54    0.41    0.05    0       0       0       0       0       0
  45           2.29    0.58    0.05    6.27    9.12    4.29    2.00    0       0       0       0       0       0
  40           2.50    0.64    0.05    9.16    13.4    7.54    2.70    0       0       0       0       0       0
  35           2.71    0.69    0.05    18.0    17.9    9.63    4.94    0.84    0.16    0.59    0       0       0
  30           2.92    0.74    2.00    27.2    23.0    15.2    8.38    1.70    0.89    1.00    0       0       0.99
  25           3.13    0.80    8.72    35.5    29.7    20.6    19.2    1.70    3.00    2.00    0.66    0       2.30
  20           3.33    0.85    14.1    43.8    36.5    36.1    31.3    7.76    4.77    2.00    0.93    0       6.37
  15           3.54    0.90    28.3    64.2    144     80.6    50.5    24.0    8.77    4.00    1.90    0       17.1
  10           3.75    0.96    46.2    164     202     184     71.7    48.5    23.5    13.8    6.51    0.40    36.4
  5            3.96    3.00    57.9    309     397     730     564     68.7    54.0    36.6    12.7    2.70    124
______________________________________________________________________________________________________________________

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

                                                       Maximum average 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         ng          0             0             0              0
  0.95         1.05         ng          0             0             0              0
  0.90         1.11         ng          0             0             0              0
  0.80         1.25         ng          0             0             0              0
  0.50         2            27.8        24.1          20.4          15.5           11.1
  0.20         5            226         213           199           180            155
  0.10         10           590         525           485           436            385
  0.04         25           1,490       1,230         1,100         939            832
  0.02         50           2,570       2,060         1,780         1,450          1,270
  0.01         100          4,070       3,330         2,750         2,110          1,820
  0.005        200          6,040       5,050         3,990         2,880          2,430
  0.002        500          9,420       ng            ng            ng             ng
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                          Probability of annual low discharges
                              [ng, statistic not given]
____________________________________________________________________________________

                                    Minimum average 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     0     0
0.10       10       ng     ng     ng     ng     ng     ng     ng     0     0
0.20       5        ng     ng     ng     ng     ng     ng     ng     0     0
0.50       2        ng     ng     ng     ng     ng     ng     ng     0     0
____________________________________________________________________________________

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

                                        Minimum average 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        0    0     0     0
0.10           10           ng     ng     ng     ng        0    0     0     0
0.20           5            ng     ng     ng     ng        0    0     0     0
0.50           2            ng     ng     ng     ng        0    0     0     0.062

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

0.05           20           0      0      0      0         0     0     0     0
0.10           10           0      0      0      0         0     0     0     0
0.20           5            0      0      0      0         0     0     0     0
0.50           2            0      0      0      0         0     0     0     0
_____________________________________________________________________________________

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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

1920     April 2   5.00       250        1933      --        5.70     0
1921     April 2   --         67.0       1934      --        5.70     0
1922     April 21  5.70       390        1935      --        5.70     0
1923     April 14  3.65       80.0       1936    April 13    5.70     2.50
1924       --      --         0          1937    May 1       3.15     20.0
1925       --      --         0          1938      --        5.70     0
1926     March 18  --         32.0       1939    March 29    5.40     105
1927     April 2   3.50       70.0       1940      --        --       0
1928       --      3.50       40.0       1941    June 21     --       130
1929       --      3.90       53.0       1942    June 7      11.72    1,180
1930       --      3.90       64.0       1943    April 4     16.40    1,430
1931       --      5.70       0          1944    June 23     --       1,180
1932       --      5.70       0

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

1943    April 4     16.40    1,430      1926    March 18    --       32.0
1944    June 23     --       1,180      1937    May 1       3.15     20.0
1942    June 7      11.72    1,180      1936    April 13    5.70     2.50
1922    April 21    5.70     390        1924    --          --       0
1920    April 2     5.00     250        1925    --          --       0
1941    June 21     --       130        1931    --          5.70     0
1939    March 29    5.40     105        1932    --          5.70     0
1923    April 14    3.65     80.0       1933    --          5.70     0
1927    April 2     3.50     70.0       1934    --          5.70     0
1921    April 2     --       67.0       1935    --          5.70     0
1930    --          3.90     64.0       1938    --          5.70     0
1929    --          3.90     53.0       1940    --          --       0
1928    --          3.50     40.0
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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
__________________________________________________________________________________________________________________________________

 1919    --      --       --       --      --       --        6.91     12.4     12.5     39.7     52.7     25.0     --
 1920    15.0    7.00     3.00     0       0        50.0      169.1    158.8    136.2    67.1     49.5     49.6     58.8
 1921    38.0    23.5     14.8     6.74    3.18     10.9      39.2     32.6     20.3     6.94     0.581    4.33     16.8
 1922    1.71    0.577    0        0       0        13.6      263.6    210.1    64.3     27.7     4.45     0.147    48.9
 1923    0       0        0        0       0        0.677     38.5     22.3     8.67     2.23     0        0        6.01

 1924    0       0        0        0       0        0         0        0        0        0        0        0        0
 1925    0       0        0        0       0        0         0        0        0        0        0        0        0
 1926    0       0        0        0       0        12.1      0        0        0        0        0        0        1.03
 1927    0       0        0        0       0.429    17.5      41.7     11.6     20.5     21.3     2.94     4.77     10.1
 1928    2.39    0.433    0        0       0        14.9      27.8     14.6     4.17     3.16     2.16     0.567    5.86

 1929    1.55    0.800    0        0       0        24.2      37.1     36.3     18.7     8.23     2.32     0.500    10.8
 1930    2.00    1.00     0        0       8.64     56.4      9.50     19.4     9.37     3.19     0        0        9.17
 1931    0       0        0        0       0        0         0        0        0        0        0        0        0
 1932    0       0        0        0       0        0         0        0        0        0        0        0        0
 1933    0       0        0        0       0        0         0        0        0        0        0        0        0

 1934    0       0        0        0       0        0         0        0        0        0        0        0        0
 1935    0       0        0        0       0        0         0        0        0        0        0        0        0
 1936    0       0        0        0       0        0         0.310    0        0        0        0        0        0.025
 1937    0       0        0        0       0        0         4.33     4.90     0        0        0        0        0.773
 1938    0       0        0        0       0        0         0        0        0        0        0        0        0

 1939    0       0        0        0       0        13.1      13.6     0.177    0.330    0.145    0        0        2.28
 1940    0       0        0        0       0        0         0        0        0        0        0        0        0
 1941    0       0        0        0       0        0.503     1.30     0.174    6.12     1.83     0.842    1.90     1.05
 1942    1.23    0.713    0.103    0       0        3.55      12.0     148.7    393.6    661.7    207.6    249.5    140.8
 1943    57.4    3.32     0        0       0        72.3      624.9    927.6    725.5    340.7    34.8     4.75     233.3
 1944    7.66    8.51     1.33     0       0        3.29      160.6    308.1    705.2    274.0    21.7     8.99     124.6
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