05061500 SOUTH BRANCH BUFFALO RIVER AT SABIN, MN


List Of Figures:

Annual mean discharge
Annual flow duration


LOCATION.--Lat 4646'20'', long 9637'40", in SW 1/4SW1/4 sec.9, T.138 N., R.47 W., Clay County, Hydrologic Unit 09020106, near center of span on downstream side of highway bridge, 0.3 mi downstream from Stony Creek, and 1 mi east of Sabin.
DRAINAGE AREA.--522 mi2.
PERIOD OF RECORD.--March 1945 to current year, water year 1981 (annual maximum only), March 1982 to September 1985 (no winter records).
GAGE.--Water-stage recorder. Datum of gage is 902.39 ft above sea level (levels by Soil Conservation Service). Prior to Aug. 17, 1948, nonrecording gage at site 1 mi downstream at different datum. Aug. 17, 1948, to Oct. 4, 1989, nonrecording gage at present site and datum.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 8,500 ft3/s, July 2, 1975, gage height, 19.90 ft; no flow for many days in most years.

Annual mean discharge

Annual mean discharge 05061500 SOUTH BRANCH BUFFALO RIVER AT SABIN, MN
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                              Statistics of monthly and annual mean discharges
                                    [m, more than 1 year of occurrence]
__________________________________________________________________________________________________________

                  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      59.2      1996            0.023     1977            15.0        14.9        0.99       2.15
November     76.7      1972            2.05      1977            14.9        13.3        0.89       2.13
December     23.5      1978            0.006     1961            5.03        4.83        0.96       0.72
January      13.1      1978            0         m               1.72        2.56        1.49       0.25
February     14.0      1987            0         m               1.65        2.58        1.57       0.24
March        581       1966            0         m               105         138         1.32       15.0
April        1,680     1997            27.9      1973            281         302         1.07       40.2
May          580       1962            8.28      1980            82.4        103         1.25       11.8
June         1,070     1962            1.30      1976            90.4        179         1.98       12.9
July         1,110     1975            0         1988            76.6        177         2.31       11.0
August       152       1993            0         1976            11.8        24.6        2.08       1.69
September    174       1986            0         1976            13.6        28.5        2.10       1.94
Annual       198       1962            12.2      1977            58.7        44.5        0.76       100

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Annual flow duration

Annual flow duration 05061500 SOUTH BRANCH BUFFALO RIVER AT SABIN, MN
----------------------------------------------------------------------------------------------------------------------
                              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       0       0       23.4     6.31    1.40    0.14    0       0       0.57    2.10    0       0
  90           0       0       0       30.6     12.2    2.85    1.50    0       0.17    1.30    3.10    0       0
  85           0       0       0       36.9     16.1    4.25    2.34    0.37    0.58    2.40    3.80    0.45    0.41
  80           0       0       0       43.8     19.3    6.17    2.86    0.71    0.78    2.40    5.13    0.69    0.93
  75           0       0       0.18    51.5     22.6    7.84    3.43    0.98    1.40    3.73    5.99    1.10    1.40
  70           0       0       0.52    59.5     26.0    9.15    4.07    1.40    2.00    4.52    6.99    1.40    2.56
  65           0.10    0       1.10    68.0     29.8    11.6    5.65    1.90    2.00    5.15    7.46    2.10    3.33
  60           0.22    0       2.49    76.9     34.2    13.8    6.72    2.67    2.70    6.06    8.45    2.10    3.92
  55           0.38    0.08    3.52    88.4     38.7    16.3    8.34    3.19    2.70    6.53    9.00    2.60    5.47
  50           0.55    0.17    4.99    99.9     43.0    19.1    11.3    3.69    4.01    8.21    10.7    3.30    6.60
  45           0.80    0.55    7.56    117      47.2    23.2    14.4    4.12    4.54    9.14    12.1    3.30    8.77
  40           1.10    0.88    15.5    135      51.5    27.9    18.5    4.55    5.39    11.0    13.2    4.52    12.0
  35           1.40    1.10    29.8    164      58.7    34.4    23.9    6.03    6.78    12.9    14.4    5.20    15.9
  30           1.70    1.80    47.8    201      66.3    42.4    31.4    7.22    8.00    16.5    16.2    5.73    21.7
  25           2.00    2.30    73.6    254      76.9    53.8    42.9    8.55    10.0    20.2    18.7    6.59    30.2
  20           2.90    2.90    104     349      92.8    73.6    60.8    11.9    12.9    24.2    21.6    7.27    42.5
  15           4.20    4.10    159     496      116     103     87.6    16.9    17.8    30.3    27.3    8.58    62.1
  10           5.17    5.04    259     690      151     169     134     24.0    26.3    38.1    32.6    12.2    102
  5            5.96    6.20    504     1,100    236     377     310     44.4    58.0    54.3    44.3    17.1    226

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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         85.2           66.7         56.0          39.3           31.1
  0.95         1.05         192            150          122           85.2           63.8
  0.90         1.11         292            229          183           127            92.5
  0.80         1.25         477            377          296           203            143
  0.50         2            1,170          944          715           480            318
  0.20         5            2,700          2,270        1,650         1,080          675
  0.10         10           4,080          3,520        2,510         1,610          983
  0.04         25           6,240          5,560        3,890         2,450          1,450
  0.02         50           8,150          7,420        5,120         3,180          1,840
  0.01         100          10,300         9,570        6,520         4,000          2,280
  0.005        200          12,700         12,000       8,110         4,920          2,760
  0.002        500          16,200         ng           ng            ng             ng

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           Annual peak discharge and corresponding gage height, period of record
                                 [--, 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

1945    March 18       14.69    1,480      1972    March 17       14.39    2,140
1946    March 18       14.34    955        1973    March 16       7.33     132
1947    April 12       13.82    1,230      1974    April 13       12.76    1,330
1948    April 4      --         730        1975    July 2         19.90    8,500
1949    April 5        9.08     324        1976    March 26       11.10    369
1950    April 1      --         1,460      1977    June 3         9.05     234
1951    April 6        13.39    1,640      1978    March 31       15.70    3,440
1952    April 8        15.37    3,400      1979    April 14       15.33    2,800
1953    May 31         15.38    3,410      1980    April 2        12.99    1,260
1954    March 24       10.90    390        1981    May 23         11.33    500
1955    April 2        12.28    862        1982    April 1        13.12    1,350
1956    April 5        15.18    2,410      1983    July 5         14.03    1,500
1957    April 21       12.53    982        1984    March 26       13.94    2,090
1958    July 7         14.60    1,520      1985    June 2         13.69    1,660
1959    June 20        11.18    572        1986    March 25       14.86    2,550
1960    April 27       12.34    1,020      1987    March 26       11.34    689
1961    May 18         9.09     248        1988    March 9        10.64    175
1962    June 9         17.04    6,340      1989    April 4        16.30    3,800
1963    June 4         13.20    1,420      1990    April 1        9.22     178
1964    April 17       11.72    796        1991    May 4          10.30    285
1965    April 11       15.96    4,130      1992    June 20        10.94    414
1966    March 15       16.78    3,310      1993    March 30       14.57    1,910
1967    March 27       12.95    1,240      1994    March 24       12.79    730
1968    April 10       8.25     230        1995    March 15       14.41    1,770
1969    April 10       18.12    6,410      1996    May 20         14.46    2,000
1970    April 9        10.70    432        1997    April 5        18.92    5,850
1971    September 6    9.32     326

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

1975    July 2         19.90    8,500      1993    March 30       14.57    1,910
1969    April 10       18.12    6,410      1995    March 15       14.41    1,770
1962    June 9         17.04    6,340      1985    June 2         13.69    1,660
1997    April 5      18.92      5,850      1951    April 6        13.39    1,640
1965    April 11       15.96    4,130      1958    July 7         14.60    1,520
1989    April 4        16.30    3,800      1983    July 5         14.03    1,500
1978    March 31       15.70    3,440      1945    March 18       14.69    1,480
1953    May 31         15.38    3,410      1950    April 1      --         1,460
1952    April 8        15.37    3,400      1963    June 4         13.20    1,420
1966    March 15       16.78    3,310      1982    April 1        13.12    1,350
1979    April 14       15.33    2,800      1974    April 13       12.76    1,330
1986    March 25       14.86    2,550      1980    April 2        12.99    1,260
1956    April 5        15.18    2,410      1967    March 27       12.95    1,240
1972    March 17       14.39    2,140      1947    April 12       13.82    1,230
1984    March 26       13.94    2,090      1960    April 27       12.34    1,020
1996    May 20         14.46    2,000      1957    April 21       12.53    982
1946    March 18       14.34    955        1976    March 26       11.10    369
1955    April 2        12.28    862        1971    September 6    9.32     326
1964    April 17       11.72    796        1949    April 5        9.08     324
1948    April 4      --         730        1991    May 4          10.30    285
1994    March 24       12.79    730        1961    May 18         9.09     248
1987    March 26       11.34    689        1977    June 3         9.05     234
1959    June 20        11.18    572        1968    April 10       8.25     230
1981    May 23         11.33    500        1990    April 1        9.22     178
1970    April 9        10.70    432        1988    March 9        10.64    175
1992    June 20        10.94    414        1973    March 16       7.33     132
1954    March 24       10.90    390

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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
__________________________________________________________________________________________________________________________________

 1945    --       --      --       --       --       --        190.2    50.1     41.0     3.77     3.08     4.92     --
 1946    7.84     5.29    0.265    0        0        201.9     51.1     18.9     15.8     37.6     3.88     2.72     29.1
 1947    8.91     9.87    2.62     0.729    2.39     105.1     393.4    50.8     63.6     8.29     0.529    2.19     53.8
 1948    6.13     2.93    0.016    0        0        56.6      263.8    22.2     8.89     4.38     1.88     0.490    30.4
 1949    0.923    5.31    1.59     0        0        0.271     90.2     23.0     5.64     15.9     8.57     0.223    12.6

 1950    3.32     4.53    1.99     0        0        188.4     618.5    286.2    17.5     4.81     1.71     0.927    94.0
 1951    3.84     2.89    0.613    0        0        9         383.1    32.3     60.2     15.7     3.61     8.31     42.1
 1952    20.5     10.9    6.66     1.79     1.00     1.51      595.3    14.3     3.38     179.8    11.1     8.15     70.7
 1953    3.97     7.82    2.02     0.558    0        86.9      90.6     241.1    544.2    21.4     17.6     4.16     84.9
 1954    1.24     3.90    1.75     0.568    0.889    86.6      91.1     50.7     54.5     10.0     4.42     6.01     26.0

 1955    19.4     10.5    3.40     0.626    0        4.84      164.3    25.2     42.4     213.0    9.86     1.49     41.4
 1956    2.67     2.64    0.135    0        0        0.177     411.5    54.3     21.1     3.12     2.84     1.56     41.2
 1957    4.10     5.49    1.73     0.235    0        75.1      157.8    49.4     48.4     35.6     11.8     91.5     40.0
 1958    34.1     40.1    6.93     2.21     3.65     19.6      41.7     27.4     45.6     419.4    12.0     15.4     56.3
 1959    10.8     28.4    2.09     0        0        54.6      44.7     55.5     179.5    90.6     14.5     9.01     40.9

 1960    13.7     7.53    4.18     3.24     2.86     27.4      386.6    68.5     38.6     39.0     7.75     8.73     50.3
 1961    4.58     5.58    0.006    0        1.07     74.9      65.2     78.2     5.55     1.97     2.10     5.22     20.5
 1962    8.95     6.33    2.89     0.100    0        0         353.7    580.1    1,068    256.9    78.8     19.4     197.8
 1963    20.8     31.2    9.11     0.013    0        41.4      88.9     98.9     293.8    5.36     9.61     22.0     51.6
 1964    6.29     7.49    2.55     0        0        3.94      347.1    79.0     30.0     5.13     5.09     7.10     40.8

 1965    6.24     10.3    0.135    0        0        0.068     816.9    62.4     99.1     25.8     14.4     18.2     86.9
 1966    50.9     17.3    5.04     0.729    0        581.2     163.1    100.0    31.1     33.3     71.6     8.41     89.7
 1967    18.8     13.8    3.83     0.435    0.143    140.1     280.8    80.3     157.4    7.30     1.56     1.64     58.7
 1968    11.7     16.0    3.81     0.132    0        25.7      66.1     47.7     29.8     12.4     4.27     11.1     19.1
 1969    33.6     30.6    7.91     0.535    0        0         927.8    42.7     10.0     38.1     8.36     3.14     91.0

 1970    9.16     12.9    5.34     1.83     1.86     8.76      162.7    61.6     62.3     8.23     1.23     2.12     28.0
 1971    6.46     9.31    3.34     0.235    0        58.6      72.5     23.5     17.2     102.8    4.16     41.6     28.5
 1972    36.3     76.7    14.4     2.99     1.19     314.1     158.5    175.5    21.4     5.13     7.43     4.31     68.5
 1973    13.8     15.1    4.68     4.88     4.92     37.1      27.9     20.4     4.19     3.49     3.37     11.9     12.7
 1974    26.0     13.2    9.74     0.733    0.050    5.46      255.1    84.0     22.8     4.32     6.79     1.35     35.7

 1975    6.73     15.2    3.34     0.329    0.029    0.623     395.6    71.2     515.7    1,112    6.44     1.66     178.3
 1976    8.82     14.8    5.35     0.835    0.372    73.1      80.3     10.2     1.30     1.22     0        0        16.4
 1977    0.023    2.05    0.772    0.190    0.094    28.7      37.9     8.91     35.8     15.2     0.426    16.5     12.2
 1978    51.1     32.8    23.5     13.1     5.29     450.8     679.0    29.9     8.69     7.67     1.06     2.89     108.9
 1979    2.94     4.74    2.03     0.582    0.236    4.76      677.0    78.5     23.3     55.2     10.8     2.67     71.3


 1980    4.10     18.2    5.04     1.64     2.11     38.9      275.5    8.28     7.73     0.217    2.17     5.60     30.4
 1982  --       --      --       --       --         211.1     248.3    45.8     6.00     7.72     2.47   --       --
 1983  --       --      --       --       --         114.4     43.7     32.0     8.03     312.4    12.3   --       --
 1984    7.78     16.1  --       --       --         441.5     156.8    27.3     129.5    5.76     0.014    0.161  --
 1985    33.6   --      --       --       --         148.3     75.1     146.2    267.4    32.8     26.7     72.8   --

 1986    36.4     14.4    7.89     5.07     2.95     439.0     601.1    324.7    231.9    70.0     19.0     173.5    160.8
 1987    45.1     27.8    20.8     7.84     14.0     213.4     86.3     44.3     8.11     5.45     6.92     8.62     41.0
 1988    6.79     13.0    8.42     0        1.07     85.7      57.7     29.0     6.02     0        0.108    0.650    17.4
 1989    3.00     7.40    3.64     2.18     2.88     10.9      694.8    25.5     9.98     1.64     0.032    12.6     63.8
 1990    8.53     8.63    2.31     4.14     4.51     39.9      60.1     42.1     34.4     6.57     0.398    0.316    17.7

 1991    5.71     9.50    5.03     1.38     4.00     31.2      47.4     85.1     34.7     65.7     3.59     3.78     24.9
 1992    11.8     10.6    6.30     4.78     5.50     83.7      46.4     22.6     96.4     26.0     8.15     9.21     27.6
 1993    2.54     20.3    8.42     3.00     2.22     155.1     215.8    50.7     81.6     425.4    152.2    11.3     94.9
 1994    10.5     7.98    6.40     5.94     5.80     210.0     198.2    72.0     13.6     30.1     5.93     8.65     48.2
 1995    27.1     40.9    10.6     5.00     4.69     341.2     115.7    76.6     9.19     26.3     3.46     5.42     56.1

 1996    59.2     23.0    5.51     0.898    0.590    19.5      385.2    349.5    50.2     4.42     4.41     1.93     75.3
 1997    9.81     14.1    2.12     1.14     0.995    1.11      1,683    100.8    75.8     158.2    12.8     17.7     171.5

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