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Last update: Wednesday, 23-Feb-2005 09:45:43 EST
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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 130 1952 0 m 12.4 29.0 2.34 1.75
November 102 1952 0 m 10.7 24.8 2.32 1.51
December 77.1 1951 0 m 5.60 16.1 2.87 0.79
January 64.5 1951 0 m 3.79 12.0 3.16 0.53
February 62.1 1951 0 m 3.29 10.8 3.29 0.46
March 437 1945 0 m 69.5 115 1.66 9.80
April 1,270 1947 0.780 1991 289 360 1.25 40.72
May 2,620 1950 1.35 1958 126 381 3.03 17.8
June 1,030 1950 0 1980 81.6 182 2.23 11.5
July 821 1950 0 m 73.6 154 2.10 10.4
August 363 1949 0 m 20.8 58.9 2.84 2.93
September 144 1944 0 m 13.2 31.4 2.38 1.86
Annual 543 1950 1.24 1977 63.3 92.7 1.46 100
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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 0.16 0.23 0 0 0 0 0 0 0 0
90 0 0 0 1.60 0.76 0.22 0 0 0 0 0 0 0
85 0 0 0 5.46 1.70 0.71 0 0 0 0 0 0 0
80 0 0 0 7.95 3.26 1.00 0.10 0 0 0 0 0 0
75 0 0 0 10.8 4.46 1.50 0.29 0 0 0 0 0 0
70 0 0 0 14.6 6.46 3.09 0.43 0 0 0 0 0 0
65 0 0 0.06 19.7 8.76 3.78 0.90 0 0 0 0 0 0.07
60 0 0 0.13 26.7 10.7 5.16 1.30 0.02 0 0 0.08 0 0.16
55 0 0 0.18 35.9 15.0 6.45 1.90 0.08 0 0.02 0.27 0.07 0.35
50 0 0 0.37 53.1 19.1 8.44 3.32 0.30 0.14 0.21 0.49 0.16 0.77
45 0.02 0 0.76 75.6 23.7 11.2 4.58 0.60 0.27 0.38 0.67 0.28 1.10
40 0.09 0.06 4.98 106 29.3 14.4 6.98 0.85 0.53 0.70 1.20 0.37 3.13
35 0.15 0.08 14.3 152 35.8 19.6 11.7 1.20 1.00 1.30 1.60 0.49 5.90
30 0.19 0.11 21.2 218 45.8 29.0 21.1 2.40 2.00 2.30 3.39 0.64 10.4
25 0.25 0.19 31.8 308 59.9 44.2 36.7 4.27 3.72 4.53 4.68 1.10 18.6
20 0.33 0.24 52.9 438 89.2 72.7 63.6 10.1 6.89 9.94 7.42 2.00 32.6
15 0.73 0.42 84.8 599 159 115 99.7 22.9 18.3 21.4 14.4 3.94 60.3
10 14.1 12.1 182 849 257 218 164 56.6 42.9 43.6 46.2 14.9 109
5 28.8 25.1 425 1,430 577 438 468 107 79.5 84.6 75.1 48.7 306
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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) (ft/s)
__________________________________________________________________________________________________
0.99 1.01 37.8 20.9 17.5 13.4 8.17
0.95 1.05 112 72.5 56.6 40.8 25.8
0.90 1.11 191 132 101 70.9 45.6
0.80 1.25 346 258 193 133 87.2
0.50 2 946 791 587 397 267
0.20 5 2,180 1,980 1,500 1,030 706
0.10 10 3,180 2,960 2,310 1,600 1,110
0.04 25 4,530 4,320 3,480 2,460 1,720
0.02 50 5,560 5,360 4,430 3,190 2,240
0.01 100 6,600 6,390 5,420 3,970 2,790
0.005 200 7,620 7,410 6,430 4,790 3,380
0.002 500 8,940 ng ng ng ng
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Probability of occurrence of annual low discharges
____________________________________________________________________________________
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 0 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0 0
0.50 2 0 0 0 0 0 0 0.019 0.119 0.410
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Probability of occurrence of seasonal low discharges
_____________________________________________________________________________________
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 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 0.182
0.50 2 0 0 0 0 0 0.013 0.140 3.98
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 0.039 0.448 0 0 0 0.008
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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
1944 July 11 8.64 1,030 1970 April 9 13.38 1,320
1945 March 18 8.48 1,000 1971 April 1 10.11 619
1946 March 23 -- 1,510 1972 April 15 16.26 2,070
1947 April 14 17.80 4,150 1973 March 16 9.30 366
1948 April 13 -- 1,040 1974 April 15 18.87 2,460
1949 June 3 9.83 1,260 1975 April 19 17.81 2,330
1950 May 11 18.96 4,660 1976 March 31 11.32 785
1951 April 8 12.56 2,100 1977 April 10 4.13 42
1952 July 21 7.80 979 1978 April 9 19.22 2,240
1953 June 17 4.11 389 1979 April 19 23.36 4,880
1954 April 13 4.63 376 1980 April 3 9.99 615
1955 April 5 4.10 289 1981 May 23 11.03 896
1956 April 13 12.50 1,960 1982 April 2 13.06 1,070
1957 June 23 -- 304 1983 March 8 13.84 1,240
1958 July 10 1.48 47 1984 June 11 16.17 2,260
1959 March 31 2.42 96 1985 May 13 13.23 1,380
1960 April 7 6.04 492 1986 March 30 14.59 1,720
1961 March 9 3.51 100 1987 July 24 15.80 1,730
1962 June 11 9.87 1,240 1988 March 26 7.86 250
1963 April 8 4.60 274 1989 April 7 21.18 3,490
1964 April 22 5.41 450 1990 June 2 6.65 254
1965 April 13 16.87 3,120 1991 May 23 11.88 1,120
1966 April 2 13.85 1,460 1992 March 8 10.36 430
1967 March 30 11.54 866 1993 April 2 13.78 660
1968 March 27 7.35 221 1994 September 19 11.50 995
1969 April 12 22.28 3,910
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 19 23.36 4,880 1970 April 9 13.38 1,320
1950 May 11 18.96 4,660 1962 June 11 9.87 1,240
1969 April 12 22.28 3,910 1983 March 8 13.84 1,240
1989 April 7 21.18 3,490 1991 May 23 11.88 1,120
1965 April 13 16.87 3,120 1982 April 2 13.06 1,070
1974 April 15 18.87 2,460 1948 April 13 -- 1,040
1975 April 19 17.81 2,330 1944 July 11 8.64 1,030
1984 June 11 16.17 2,260 1945 March 18 8.48 1,000
1978 April 9 19.22 2,240 1994 September 19 11.50 995
1951 April 8 12.56 2,100 1952 July 21 7.80 979
1972 April 15 16.26 2,070 1981 May 23 11.03 896
1956 April 13 12.50 1,960 1967 March 30 11.54 866
1987 July 24 15.80 1,730 1976 March 31 11.32 785
1986 March 30 14.59 1,720 1993 April 2 13.78 660
1946 March 23 -- 1,510 1971 April 1 10.11 619
1966 April 2 13.85 1,460 1980 April 3 9.99 615
1985 May 13 13.23 1,380 1960 April 7 6.04 492
1964 April 22 5.41 450 1990 June 2 6.65 254
1992 March 8 10.36 430 1988 March 26 7.86 250
1953 June 17 4.11 389 1968 March 27 7.35 221
1954 April 13 4.63 376 1961 March 9 3.51 100
1973 March 16 9.30 366 1959 March 31 2.42 96
1957 June 23 -- 304 1958 July 10 1.48 47
1955 April 5 4.10 289 1977 April 10 4.13 42
1963 April 8 4.60 274
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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
__________________________________________________________________________________________________________________________________
1944 -- -- -- -- -- 0.142 83.3 43.5 114.2 327.2 163.9 143.8 --
1945 19.0 11.8 3.56 0.823 0.350 437.2 629.4 184.5 22.4 7.24 2.61 1.83 110.3
1946 1.29 0.820 0.084 0 0 363.5 280.2 60.7 13.0 12.8 0.058 0.453 61.4
1947 3.99 1.68 0.510 0 0 22.0 1,273 424.3 607.5 129.9 65.9 56.0 214.2
1948 73.0 55.8 47.5 35.4 25.1 28.9 656.3 265.8 102.2 76.0 40.6 11.7 117.7
1949 10.8 19.8 17.8 18.2 14.9 18.1 216.7 198.3 411.5 585.2 362.7 74.2 163.4
1950 60.5 74.3 58.6 27.2 23.8 51.9 1,537 2,617 1,030 821.0 133.7 50.8 543.3
1951 118.4 85.7 77.1 64.5 62.1 107.0 1,190 714.6 301.7 102.5 60.7 122.5 250.2
1952 129.8 101.8 13.1 12.4 10.8 14.8 390.7 125.3 90.3 201.9 54.3 3.80 95.7
1953 1.30 0.877 0.681 0.174 0.132 52.1 46.5 38.5 100.7 119.6 6.61 1.64 30.9
1954 0.039 0.227 0.742 0.206 0.050 6.64 135.4 60.2 22.4 2.21 0.106 0 19.0
1955 0 0.053 0.106 0 0 0.484 69.5 9.39 14.9 17.6 11.2 0 10.2
1956 0 0 0 0 0 0.010 317.2 37.5 23.7 1.02 0.035 0.090 31.2
1957 0 0 0 0 0 40.5 35.5 10.3 41.6 17.2 0.906 5.17 12.6
1958 3.01 7.03 0.945 0 0.339 1.33 4.13 1.35 3.00 15.5 0.255 0 3.09
1959 0 0 0 0 0.007 18.3 19.9 6.75 4.96 1.27 0 0 4.28
1960 0 0 0 0 0 23.7 108.9 10.6 12.6 8.27 0.277 3.47 13.9
1961 0 0.117 0 0 0 35.6 12.9 25.0 3.03 0 0 0.013 6.46
1962 0.387 0 0 0 0 0.258 97.9 198.5 347.1 264.3 8.75 1.50 76.8
1963 0.687 1.60 0.713 0.155 0 20.6 33.7 11.6 32.7 0.445 0 0 8.49
1964 0 0 0 0 0 0 103.4 23.2 18.6 3.26 0.061 0.167 12.3
1965 0.077 0.123 0 0 0 0 573.3 25.9 29.7 21.0 3.63 3.76 54.2
1966 26.9 5.43 2.72 0.152 0.068 389.4 291.5 50.4 9.99 2.38 1.70 2.32 65.6
1967 0.210 0.030 0 0 0 60.1 143.6 30.1 9.92 1.17 0 0 20.4
1968 0 0 0 0 0 19.9 11.8 5.42 15.7 1.06 0 0 4.49
1969 0 0 0 0 0 0 608.5 31.4 24.7 42.8 3.19 2.34 58.8
1970 2.85 2.29 0.768 0.177 0.168 1.47 350.4 58.0 137.6 2.33 0.045 0.137 45.9
1971 0.255 0.563 0.023 0 0 46.7 100.7 5.39 2.76 0.458 0 0 13.0
1972 60.7 60.2 4.57 0.500 0 317.9 321.3 52.9 4.71 5.26 2.43 0.587 69.3
1973 0.837 0 0.278 0.098 0.078 84.1 10.3 4.21 0.741 0 0 25.6 10.6
1974 30.7 5.38 1.41 0.291 0.174 0.165 775.2 149.9 20.7 1.25 3.88 0.078 81.8
1975 0.232 6.35 0.593 0.235 0.121 0.128 552.8 86.0 17.0 230.1 0.889 0.009 74.4
1976 0.001 0.866 0.008 0 0.004 68.1 71.0 2.44 4.06 0.014 0 0 12.2
1977 0 0 0 0 0 2.79 10.2 1.36 0.565 0 0 0.004 1.24
1978 0.501 0.180 0.020 0.020 0.020 15.5 676.3 9.95 0.998 0.018 0.004 0 57.9
1979 0 0 0 0 0 0 894.8 43.7 13.4 53.4 1.43 0.087 83.0
1980 0 0.626 0.070 0.015 0 6.75 105.9 0.866 0 0 0.033 0 9.39
1981 0 0 0 0 1.36 1.30 0.078 47.7 3.92 1.18 0.199 4.64 5.09
1982 12.7 5.32 1.54 0.097 0.228 70.8 337.3 24.8 2.86 1.18 0.123 0 37.9
1983 12.0 7.46 5.04 1.33 0.790 342.4 68.8 4.34 247.1 55.7 20.5 18.5 65.6
1985 -- -- -- -- -- -- 14.3 297.6 11.2 9.13 8.14 3.83 --
1986 4.61 1.82 0.568 0.445 0.400 164.2 321.9 135.5 19.3 18.4 4.19 0.547 56.1
1987 0.319 1.04 1.20 0.338 0.270 206.2 20.9 33.2 5.92 259.6 12.6 1.44 46.0
1988 0.745 0.706 0.626 0.197 0.164 81.9 49.7 1.56 0.100 0 2.92 5.68 12.1
1989 0.098 0.073 0 0 0 0.484 608.6 12.5 4.60 0.076 0 0 51.5
1990 4.43 -- -- -- -- -- 28.1 3.57 30.7 5.15 0 0 --
1991 0 -- -- -- -- 9.20 4.93 72.0 27.4 2.84 0.125 0 --
1992 0 -- -- -- -- 63.7 6.35 2.73 17.4 28.7 20.6 21.9 --
1993 3.35 -- -- -- -- -- 133.0 5.23 4.69 100.2 36.9 0.480 --
1994 -- -- -- -- -- -- 109.8 32.3 92.9 124.6 1.83 91.9 --
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U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:45:43 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05067500.html |
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