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Last update: Tuesday, 24-Aug-2004 12:38:25 EDT
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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 106 1995 0.473 1992 7.37 16.9 2.29 2.64
November 48.7 1995 0.380 1960 5.39 8.02 1.49 1.93
December 16.1 1995 0.155 1959 2.74 2.94 1.07 0.98
January 7.31 1995 0 m 1.31 1.75 1.33 0.47
February 6.42 1995 0 m 1.66 1.94 1.16 0.60
March 476 1995 0.587 1964 59.0 91.3 1.55 21.1
April 1,040 1997 2.44 1981 128 215 1.67 46.0
May 220 1997 1.71 1981 27.5 43.0 1.56 9.86
June 53.0 1996 0.907 1961 14.3 14.5 1.02 5.12
July 273 1993 0.021 1989 17.2 43.6 2.54 6.16
August 133 1993 0.076 1984 7.67 21.9 2.86 2.75
September 58.5 1957 0.094 1984 6.82 13.5 1.98 2.44
Annual 115 1997 1.52 1981 23.4 28.4 1.21 100
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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 0 0.09 2.10 1.50 0.94 0.11 0.03 0.10 0.38 0.94 0.14 0.07
90 0 0 0.18 4.43 2.30 1.20 0.22 0.17 0.25 0.70 1.10 0.29 0.15
85 0 0 0.53 5.97 3.30 1.80 0.44 0.31 0.45 0.95 1.40 0.59 0.48
80 0.10 0.10 0.76 6.63 4.10 2.30 0.86 0.58 0.61 1.30 1.70 0.74 0.70
75 0.15 0.10 1.10 8.40 5.80 2.90 1.20 0.80 0.82 1.30 1.70 0.95 1.00
70 0.17 0.16 1.60 10.3 6.45 3.60 1.20 0.80 1.10 1.80 2.10 0.95 1.00
65 0.25 0.20 2.30 13.8 7.37 4.63 1.70 0.80 1.10 1.80 2.10 1.20 1.50
60 0.35 0.26 3.38 16.9 8.27 5.28 2.71 1.10 1.50 2.40 2.10 1.20 1.50
55 0.50 0.34 4.03 20.1 10.8 6.26 3.24 1.10 1.50 2.40 2.60 1.50 2.64
50 0.59 0.43 5.49 23.9 12.6 7.45 3.81 1.50 2.00 2.40 2.60 1.50 3.16
45 0.71 0.56 6.76 29.5 14.6 9.06 4.82 1.50 2.00 3.40 3.20 1.90 3.68
40 0.84 0.92 8.38 38.5 17.0 10.8 6.06 2.00 2.60 3.71 3.90 1.90 4.19
35 1.00 1.20 14.3 49.3 20.2 12.7 7.55 2.00 2.60 4.03 3.90 2.50 5.74
30 1.40 1.50 20.3 64.2 22.9 14.7 10.3 3.45 3.63 4.55 3.90 2.50 6.81
25 1.70 1.50 31.5 85.0 26.1 17.0 13.4 4.14 4.23 5.08 5.29 3.10 9.46
20 2.00 2.00 49.4 124 30.3 21.4 17.9 5.21 5.32 6.82 6.10 4.16 14.3
15 2.40 4.22 79.0 183 38.9 26.7 23.7 6.14 7.92 9.24 6.76 4.75 21.1
10 3.40 5.13 159 308 60.8 33.8 34.7 11.7 13.3 14.2 8.20 6.02 33.8
5 4.90 6.18 362 666 126 50.6 60.7 30.9 32.8 24.6 19.2 8.30 81.4
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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 7.90 3.43 2.95 2.51 2.45
0.95 1.05 25.1 12.7 10.8 8.84 7.32
0.90 1.11 45.4 24.8 20.9 16.7 12.9
0.80 1.25 91.4 54.0 45.0 34.9 25.1
0.50 2 330 219 177 130 85.0
0.20 5 1,110 789 618 430 269
0.10 10 2,030 1,480 1,130 766 479
0.04 25 3,780 2,790 2,090 1,370 869
0.02 50 5,600 4,130 3,050 1,960 1,260
0.01 100 7,910 5,810 4,240 2,670 1,750
0.005 200 10,800 7,870 5,660 3,510 2,350
0.002 500 15,600 ng ng ng ng
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Annual peak discharge and corresponding gage height, period of record
_____________________________________________________________________________________
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
1956 April 12 6.75 767 1977 March 15 3.18 25.0
1957 September 3 5.07 248 1978 March 30 6.93 560
1958 October 25 3.31 56.0 1979 April 19 17.78 9,000
1959 March 14 4.42 30.0 1980 March 30 8.15 100
1960 April 5 6.00 370 1981 February 17 4.65 28.0
1961 March 2 3.60 40.0 1982 March 30 8.70 580
1962 March 28 6.84 390 1983 March 7 9.95 650
1963 April 6 3.47 24.0 1984 March 27 9.16 755
1964 June 19 3.65 60.0 1985 March 10 5.50 88.0
1965 April 12 9.23 1,780 1986 March 20 6.51 210
1966 March 13 8.69 880 1987 April 3 8.99 960
1967 March 27 6.90 650 1988 March 28 5.80 115
1968 June 8 4.46 210 1989 April 3 6.64 303
1969 April 11 10.90 2,510 1990 June 13 6.67 32.0
1970 June 17 5.96 472 1991 May 23 6.74 50.0
1971 March 31 6.20 305 1992 March 6 8.14 239
1972 April 14 5.03 305 1993 July 24 14.50 1,450
1973 March 14 3.84 100 1994 March 22 9.91 1,020
1974 April 11 8.39 1,130 1995 March 17 11.88 1,900
1975 April 17 7.51 680 1996 April 12 11.13 1,900
1976 March 24 6.39 400 1997 April 3 11.56 2,780
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 19 17.78 9,000 1960 April 5 6.00 370
1997 April 3 11.56 2,780 1971 March 31 6.20 305
1969 April 11 10.90 2,510 1972 April 14 5.03 305
1995 March 17 11.88 1,900 1989 April 3 6.64 303
1996 April 12 11.13 1,900 1957 September 3 5.07 248
1965 April 12 9.23 1,780 1992 March 6 8.14 239
1993 July 24 14.50 1,450 1968 June 8 4.46 210
1974 April 11 8.39 1,130 1986 March 20 6.51 210
1994 March 22 9.91 1,020 1988 March 28 5.80 115
1987 April 3 8.99 960 1973 March 14 3.84 100
1966 March 13 8.69 880 1980 March 30 8.15 100
1956 April 12 6.75 767 1985 March 10 5.50 88.0
1984 March 27 9.16 755 1964 June 19 3.65 60.0
1975 April 17 7.51 680 1958 October 25 3.31 56.0
1967 March 27 6.90 650 1991 May 23 6.74 50.0
1983 March 7 9.95 650 1961 March 2 3.60 40.0
1982 March 30 8.70 580 1990 June 13 6.67 32.0
1978 March 30 6.93 560 1959 March 14 4.42 30.0
1970 June 17 5.96 472 1981 February 17 4.65 28.0
1976 March 24 6.39 400 1977 March 15 3.18 25.0
1962 March 28 6.84 390 1963 April 6 3.47 24.0
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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
__________________________________________________________________________________________________________________________________
1956 -- -- -- -- -- -- 118.0 12.1 10.6 3.25 1.75 1.84 --
1957 1.47 4.56 1.75 0.681 0 7.85 9.60 8.93 5.32 8.64 5.78 58.5 9.39
1958 29.8 20.5 7.42 1.90 2.18 4.64 12.6 7.14 8.60 11.8 2.15 1.28 9.22
1959 1.76 2.18 0.155 0 0 7.87 6.97 6.84 5.81 3.32 1.50 1.25 3.15
1960 2.60 0.380 0.610 0.019 0 32.2 84.9 7.32 7.17 1.85 2.31 2.11 11.7
1961 1.75 1.67 0.197 0.135 0.036 9.81 7.47 5.39 0.907 0.871 0.900 1.94 2.61
1962 1.66 1.41 0.574 0.103 0.100 25.6 46.8 14.3 18.0 14.2 2.53 2.86 10.7
1963 2.77 4.31 2.10 0.090 0 2.42 9.97 5.65 3.92 1.77 1.00 1.00 2.92
1964 0.971 1.25 0.726 0.223 0.197 0.587 13.6 6.00 17.6 11.8 4.58 4.53 5.16
1965 4.42 2.86 0.971 0.432 0.411 2.22 248.3 19.5 8.85 11.8 6.80 7.94 26.0
1966 9.66 5.63 3.06 0.239 0.086 163.8 28.7 26.3 22.8 19.7 5.97 2.87 24.4
1967 3.59 3.34 1.94 1.22 0.825 96.6 99.8 40.8 17.7 7.30 3.56 1.45 23.3
1968 3.21 2.18 1.48 0.558 0.549 20.0 14.2 17.3 31.6 11.1 4.88 4.04 9.27
1969 4.11 4.90 3.27 0.269 0.613 2.13 455.9 28.5 20.6 11.7 1.75 3.50 44.3
1970 4.89 5.51 4.19 1.79 2.00 12.7 43.7 26.4 50.6 10.9 6.13 6.86 14.6
1971 5.67 6.82 2.62 0.319 0.897 32.0 87.6 13.5 22.1 9.07 1.71 2.76 15.4
1972 5.04 7.06 2.99 1.38 0.192 66.2 79.8 33.7 13.6 2.57 2.76 1.94 18.1
1973 2.75 2.81 1.90 0.806 1.70 23.4 7.22 5.93 2.85 0.617 0.947 2.97 4.52
1974 3.65 2.95 1.71 0.393 0.731 2.40 232.9 37.4 16.5 2.23 1.91 1.44 25.1
1975 2.54 3.84 3.03 1.55 0.674 9.50 148.2 38.5 20.9 35.7 2.71 2.82 22.4
1976 3.23 3.44 1.89 1.02 3.66 76.8 33.7 7.59 2.41 1.17 0.087 0.128 11.3
1977 1.25 2.00 0.723 0.083 0.412 5.74 6.81 3.11 1.56 1.63 0.852 3.29 2.29
1978 3.52 4.92 3.33 0.733 0.180 59.8 83.7 12.0 3.35 0.824 0.811 0.737 14.5
1979 1.77 1.70 0.761 0.140 0.100 1.30 653.7 82.0 9.55 2.78 1.95 0.915 62.4
1980 1.32 1.98 1.88 0.931 0.445 15.4 29.5 2.69 1.84 0.238 1.98 1.12 4.93
1981 1.75 1.67 1.03 0.803 2.32 2.91 2.44 1.71 2.23 0.438 0.565 0.499 1.52
1982 2.14 2.33 1.11 0.481 1.61 67.5 75.0 10.4 6.48 4.56 0.952 0.607 14.5
1983 13.1 4.62 5.40 2.42 5.37 175.0 38.0 12.6 17.5 17.4 3.56 3.89 25.2
1984 3.58 4.08 1.82 1.91 4.28 143.3 60.4 23.7 5.39 0.639 0.076 0.094 20.9
1985 1.69 2.54 1.76 0.555 1.87 23.5 3.24 3.54 8.72 2.36 1.20 2.41 4.48
1986 4.86 3.05 1.79 2.33 1.73 48.6 31.1 37.4 4.73 5.66 4.62 5.19 12.7
1987 7.03 4.54 4.35 3.05 5.03 269.5 264.4 19.3 9.21 12.5 3.00 3.83 50.6
1988 6.19 5.62 3.40 1.05 1.68 41.4 25.5 9.73 1.94 0.353 0.673 0.549 8.20
1989 0.942 2.18 1.62 0.805 0.445 7.53 58.5 6.15 1.73 0.021 1.97 4.41 7.14
1990 1.27 2.66 0.582 0 0.061 2.86 12.3 2.08 12.3 7.31 0.266 0.499 3.51
1991 0.956 1.11 0.793 0 0.074 2.36 3.16 7.29 2.54 0.802 0.130 0.327 1.64
1992 0.473 1.01 1.02 1.50 4.61 78.7 7.10 2.58 2.14 2.67 0.652 1.80 8.77
1993 1.78 2.09 0.877 0.056 1.19 76.1 73.2 18.6 12.2 273.3 133.3 52.5 54.4
1994 15.3 10.9 7.23 5.38 4.84 195.9 125.4 35.4 49.4 51.5 14.6 40.1 46.6
1995 106.4 48.7 16.1 7.31 6.42 475.5 337.4 143.3 47.5 82.8 55.0 34.8 114.3
1996 22.4 18.1 8.62 6.34 5.40 106.6 672.8 134.1 53.0 45.5 28.8 8.69 92.0
1997 8.82 7.41 5.72 4.91 5.32 20.1 1,040 219.8 38.9 28.0 5.51 6.32 115.1
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U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 24-Aug-2004 12:38:25 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr00344/htdocs/ff.05057200.html |
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