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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 50.7 1995 0 m 1.91 7.39 3.86 1.39
November 8.60 1995 0 m 1.00 1.94 1.94 0.72
December 4.28 1995 0 m 0.31 0.82 2.61 0.23
January 2.84 1997 0 m 0.12 0.47 3.95 0.09
February 2.21 1976 0 m 0.20 0.53 2.71 0.14
March 160 1995 0 m 24.5 33.7 1.37 17.8
April 531 1997 1.12 1981 72.1 105 1.45 52.3
May 81.3 1950 0.119 1955 12.8 17.5 1.37 9.29
June 78.1 1997 0.009 1988 10.3 15.4 1.49 7.49
July 168 1993 0 m 11.0 26.5 2.42 7.95
August 22.3 1993 0 m 1.32 4.33 3.28 0.96
September 47.3 1996 0 m 2.25 8.54 3.80 1.63
Annual 62.9 1997 0.678 1977 11.5 12.0 1.05 100
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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 0.08 0.09 0 0 0 0 0 0 0 0
90 0 0 0 1.00 0.45 0 0 0 0 0 0 0 0
85 0 0 0 1.40 0.62 0.07 0 0 0 0 0 0 0
80 0 0 0 2.00 0.85 0.20 0 0 0 0 0 0 0
75 0 0 0 3.42 1.20 0.39 0 0 0 0 0 0 0
70 0 0 0 4.34 1.60 0.55 0 0 0 0 0 0 0
65 0 0 0 4.94 2.20 0.76 0.06 0 0 0 0 0 0
60 0 0 0 6.93 2.20 1.10 0.16 0 0 0 0 0 0
55 0 0 0 9.33 3.48 1.50 0.23 0 0 0 0 0 0
50 0 0 0.02 12.5 4.31 2.10 0.45 0 0 0 0.09 0 0.03
45 0 0 0.61 16.0 4.93 2.10 0.64 0 0 0 0.11 0 0.14
40 0 0 1.20 20.7 6.46 3.42 0.90 0 0 0 0.30 0 0.43
35 0 0 2.40 26.4 8.04 4.28 1.30 0 0 0 0.46 0 0.63
30 0 0 5.15 34.4 9.72 4.97 1.80 0.09 0 0.08 0.70 0.10 1.40
25 0 0 10.3 47.3 12.0 7.04 2.93 0.16 0.09 0.27 0.87 0.10 2.00
20 0 0 19.9 69.3 15.2 9.79 4.36 0.28 0.22 0.67 1.30 0.28 3.88
15 0 0 35.7 115 19.7 14.1 8.75 0.63 0.54 0.90 2.00 0.35 7.24
10 0.10 0.43 76.0 194 27.2 20.6 20.8 1.50 1.40 2.20 2.50 0.53 16.0
5 0.83 0.84 147 341 49.6 40.2 46.9 5.93 5.10 7.75 5.28 2.30 42.8
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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 13.1 8.21 5.33 3.54 2.91
0.95 1.05 35.7 22.0 14.7 9.92 7.27
0.90 1.11 59.5 36.5 24.8 16.7 11.7
0.80 1.25 108 66.4 45.6 30.8 20.3
0.50 2 320 198 138 91.9 56.5
0.20 5 869 554 387 250 148
0.10 10 1,420 925 644 407 240
0.04 25 2,340 1,570 1,080 668 394
0.02 50 3,190 2,180 1,500 905 538
0.01 100 4,180 2,920 1,990 1,180 707
0.005 200 5,320 3,790 2,570 1,490 905
0.002 500 7,070 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
1947 April 14 8.90 1,230 1973 March 15 8.47 200
1948 April 11 -- 590 1974 April 12 9.27 790
1949 March 31 -- 400 1975 April 18 11.62 2,550
1950 April 7 -- 620 1976 March 24 9.93 150
1951 March 28 8.60 368 1977 May 31 5.02 41.0
1952 April 1 9.70 600 1978 March 29 8.99 375
1953 June 16 8.63 1,050 1979 April 19 10.37 3,490
1954 April 6 4.90 120 1980 March 24 -- 63.0
1955 March 31 9.00 200 1981 May 27 5.14 22.0
1956 April 13 -- 250 1982 April 3 10.55 710
1957 June 24 5.58 115 1983 June 22 8.07 428
1958 July 5 5.40 77.0 1984 March 29 -- 987
1959 June 10 6.25 100 1985 March 18 -- 164
1960 April 6 8.09 437 1986 July 11 10.12 767
1961 March 6 6.06 25.0 1987 March 20 7.98 475
1962 April 5 10.30 450 1988 April 1 -- 30.0
1963 April 7 5.30 68.0 1989 April 2 -- 602
1964 April 5 6.70 100 1990 June 4 6.01 64.0
1965 April 11 11.60 900 1991 May 25 -- 43.0
1966 March 31 9.16 300 1992 July 1 7.82 255
1967 April 17 7.82 384 1993 July 17 -- 2,970
1968 June 8 7.07 190 1994 March 19 9.47 470
1969 April 10 11.41 1,690 1995 March 14 9.44 700
1970 April 6 9.41 380 1996 April 10 -- 750
1971 April 2 6.20 97.0 1997 April 15 10.84 1,680
1972 April 14 7.05 252
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 19 10.37 3,490 1948 April 11 -- 590
1993 July 17 -- 2,970 1987 March 20 7.98 475
1975 April 18 11.62 2,550 1994 March 19 9.47 470
1969 April 10 11.41 1,690 1962 April 5 10.30 450
1997 April 15 10.84 1,680 1960 April 6 8.09 437
1947 April 14 8.90 1,230 1983 June 22 8.07 428
1953 June 16 8.63 1,050 1949 March 31 -- 400
1984 March 29 -- 987 1967 April 17 7.82 384
1965 April 11 11.60 900 1970 April 6 9.41 380
1974 April 12 9.27 790 1978 March 29 8.99 375
1986 July 11 10.12 767 1951 March 28 -- 368
1996 April 10 -- 750 1966 March 31 9.16 300
1982 April 3 10.55 710 1992 July 1 7.82 255
1995 March 14 9.44 700 1972 April 14 7.05 252
1950 April 7 -- 620 1956 April 13 -- 250
1989 April 2 -- 602 1955 March 31 9.00 200
1952 April 1 9.70 600 1973 March 15 8.47 200
1968 June 8 7.07 190 1963 April 7 5.30 68.0
1985 March 18 -- 164 1990 June 4 6.01 64.0
1976 March 24 9.93 150 1980 April 1 -- 63.0
1954 April 6 -- 120 1991 May 25 -- 43.0
1957 June 24 5.58 115 1977 May 31 5.02 41.0
1959 June 10 6.25 100 1988 April 1 -- 30.0
1964 April 5 6.70 100 1961 March 6 6.06 25.0
1971 April 2 6.20 97.0 1981 May 27 5.14 22.0
1958 July 5 5.40 77.0
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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
__________________________________________________________________________________________________________________________________
1946 -- -- -- -- -- -- -- -- -- -- 0 0 --
1947 0.303 0.847 0.168 0 0 30.7 174.4 7.83 38.7 1.53 0 0 21.0
1948 0.035 0.100 0.129 0.100 0 0 137.9 5.50 1.50 0.506 0.113 0 12.0
1949 0 0.183 0.032 0 0 15.2 40.6 2.58 1.09 1.98 0.100 0 5.13
1950 0 0.037 0 0 0 24.7 203.7 81.3 17.1 2.60 0.026 0 27.4
1951 0.148 0.150 0 0 0 29.8 28.2 2.20 3.06 0.629 0 0.263 5.39
1952 0.010 0.733 0.277 0 0 0 76.1 1.68 0.083 1.13 0.006 0 6.57
1953 0 0 0 0 0 5.30 2.23 5.66 48.9 8.10 0.913 0 5.90
1954 0 0 0 0 0.161 5.97 9.09 2.09 1.76 0.035 0 0 1.59
1955 0 0 0 0 0 6.13 11.5 0.119 1.38 0 1.73 0 1.74
1956 0 0 0 0 0 0 25.8 2.79 8.81 0.068 0 0 3.08
1957 0 0 0 0 0 3.77 1.72 2.17 16.6 6.65 2.64 1.73 2.94
1958 0.900 2.75 0.061 0 1.18 1.89 3.40 1.87 3.09 9.72 0 0 2.08
1959 0 0 0 0 0 16.3 1.44 1.23 4.50 0.190 0 0 1.99
1960 0 0 0 0 0 27.5 49.0 2.59 0.953 11.5 0.006 0 7.61
1961 0 0 0 0 0 7.54 2.94 2.15 0.153 0 0 0 1.08
1962 4.24 0.127 0 0 0 11.3 93.3 16.8 8.07 38.6 2.76 1.50 14.7
1963 0.510 2.63 1.24 0 0 2.40 10.2 3.42 3.87 0.023 0 0 2.02
1964 0 0 0 0 0 0 21.8 4.88 10.2 0.429 0.032 0.103 3.08
1965 0.119 0.660 0.097 0 0 0 108.9 15.2 4.49 5.98 0.103 0.590 11.2
1966 4.20 1.17 0.347 0 0 58.9 48.2 14.1 4.60 2.44 2.16 0.186 11.4
1967 0.015 0.010 0 0 0 19.0 50.3 9.83 2.74 1.17 0 0 6.91
1968 0 0 0 0 0 10.2 9.75 6.71 30.9 1.82 0 0 4.92
1969 0.094 0.473 0.175 0 0 0 238.2 8.42 5.44 22.7 0.682 0.339 22.8
1970 0.744 1.67 0.323 0.033 0.008 32.3 112.6 24.3 31.3 1.53 0.039 0.469 17.0
1971 0.244 1.09 0.119 0 0 20.5 18.4 6.96 2.63 0.478 0 0 4.22
1972 0.593 2.15 0.351 0.015 0 20.9 38.6 13.9 1.85 1.11 0.319 0.021 6.64
1973 0.244 0.979 0.043 0 0 33.8 3.02 1.39 0.198 0 0.043 7.88 4.01
1974 2.63 1.66 0.226 0 0 0 136.5 25.7 10.9 3.82 0.451 0.009 15.0
1975 0 1.45 0.082 0 0 0.106 286.3 43.8 40.2 39.5 0.084 0 34.1
1976 0.073 0.311 0.037 0 2.21 35.4 13.7 1.46 0.027 0 0 0 4.45
1977 0 0 0 0 0 2.35 3.00 2.35 0.388 0 0 0 0.678
1978 1.33 0.088 0 0 0 81.8 43.5 7.35 4.81 0.391 0.070 0.084 11.7
1979 0 0 0 0 0 0 381.9 20.0 8.94 1.17 0.066 0 33.9
1980 0.003 0.143 0.179 0 0 11.1 16.0 0.871 0.299 0 0.490 0.536 2.46
1981 0 0.121 0.046 0 0.368 1.73 1.12 2.94 3.39 0.163 0 0 0.824
1982 0 0 0 0 0 3.55 141.2 17.7 1.66 0.001 0 0 13.5
1983 11.4 3.50 1.02 0 0.361 35.8 18.3 6.85 36.3 10.6 0.020 0 10.4
1984 0 0 0 0 0 135.5 52.5 4.79 21.6 1.16 0 0 18.1
1985 0 0 0 0 0 12.7 4.67 11.1 7.08 1.78 0 0 3.14
1986 0 0 0 0 0 40.2 91.8 61.4 0.987 40.7 2.77 1.35 20.1
1987 1.71 1.67 0.829 0.448 1.79 101.4 17.7 26.3 7.00 5.78 0.951 0.069 14.0
1988 0 0.546 0.561 0.060 0.059 4.39 6.91 1.02 0.009 0 0 0 1.13
1989 0 0 0 0 0 16.8 84.7 2.34 1.18 0 0 5.87 9.16
1990 0.076 0 0 0 0 0.935 4.43 3.24 21.1 6.93 0.007 0 3.04
1991 0 0 0 0 0 3.77 1.48 10.7 1.52 6.43 0.138 0 2.03
1992 0 0 0 0 0.001 23.0 4.08 1.34 5.57 20.1 0.012 0.001 4.56
1993 0 0 0 0 0 38.3 29.3 7.28 7.49 168.0 22.3 0.845 23.1
1994 1.95 2.09 0 0 0 67.4 16.6 7.86 3.72 58.5 22.1 40.1 18.5
1995 50.7 8.60 4.28 1.62 0.732 160.0 69.4 37.9 1.88 16.2 4.77 3.91 30.3
1996 12.3 7.68 1.74 0.978 0.910 50.5 198.7 64.4 8.03 1.93 1.45 47.3 32.8
1997 3.08 7.30 3.57 2.84 2.20 37.8 530.6 36.1 78.1 54.5 1.20 3.59 62.9
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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.05060500.html |
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