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Last update: Tuesday, 24-Aug-2004 12:38:24 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 535 1994 0 m 30.5 92.2 3.02 2.46
November 307 1996 0 m 16.9 54.4 3.23 1.36
December 57.5 1985 0 m 5.40 11.4 2.11 0.43
January 42.4 1997 0 m 3.45 8.30 2.41 0.28
February 148 1997 0 m 6.18 21.2 3.43 0.50
March 628 1996 0 m 48.0 105 2.19 3.86
April 3,810 1997 0 1942 310 577 1.86 25.0
May 1,440 1997 0.228 1977 307 414 1.35 24.7
June 1,100 1986 0.010 1977 249 305 1.23 20.0
July 1,040 1962 0 m 161 247 1.54 12.9
August 1,180 1993 0 m 71.2 219 3.08 5.73
September 1,060 1993 0 m 35.2 148 4.19 2.83
Annual 536 1997 0.377 1977 104 119 1.14 100
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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 0.45 0.58 0 0 0 0 0 0 0 0
90 0 0 0 1.50 1.20 0.35 0 0 0 0 0 0 0
85 0 0 0 2.74 1.80 0.72 0.09 0 0 0 0 0 0
80 0 0 0 3.64 3.16 1.50 0.25 0 0 0 0 0 0
75 0 0 0 5.38 4.37 3.27 0.52 0.09 0.06 0.03 0 0 0
70 0 0 0.08 7.95 6.98 5.12 1.10 0.18 0.12 0.08 0.11 0 0.18
65 0 0 0.32 11.8 10.8 8.00 3.18 0.26 0.17 0.16 0.21 0 0.40
60 0 0 0.90 17.6 16.2 13.2 4.94 0.78 0.34 0.23 0.41 0 0.61
55 0 0 1.80 25.5 32.9 25.8 7.09 1.60 0.48 0.32 0.57 0.10 1.40
50 0 0 3.09 37.7 61.2 48.8 10.6 3.38 0.69 0.65 0.80 0.18 2.66
45 0 0 4.41 63.0 106 73.1 20.2 4.85 0.98 0.92 1.10 0.43 3.89
40 0.04 0 7.73 102 161 127 33.0 6.51 2.00 1.30 1.60 0.57 6.08
35 0.41 0.16 11.6 168 253 199 69.0 8.75 3.09 1.90 2.20 1.40 9.03
30 0.69 0.55 16.2 239 364 324 117 15.4 4.42 3.21 4.52 1.80 15.6
25 2.00 1.40 24.0 340 529 443 197 21.8 6.42 4.38 6.02 4.42 29.5
20 4.55 6.46 39.7 542 716 559 295 38.7 9.57 7.17 7.81 5.22 64.7
15 6.01 8.18 67.2 728 875 690 453 83.6 18.0 20.1 11.4 8.67 141
10 11.2 13.0 124 930 1,050 846 632 138 49.0 72.2 26.0 16.3 342
5 20.9 26.2 312 1,230 1,250 1,060 857 304 137 202 85.8 30.5 758
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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 18.1 4.62 3.10 1.98 1.21
0.95 1.05 52.5 21.3 16.1 11.6 7.68
0.90 1.11 89.7 44.6 35.6 27.0 18.7
0.80 1.25 166 102 86.3 69.3 50.4
0.50 2 490 404 374 328 259
0.20 5 1,280 1,250 1,230 1,140 970
0.10 10 2,030 12,030 11,970 11,770 11,470
0.04 25 3,200 13,200 13,100 12,790 12,320
0.02 50 4,220 14,220 14,090 13,680 13,050
0.01 100 5,350 5,290 15,130 14,620 13,830
0.005 200 6,580 6,350 16,160 15,540 14,600
0.002 500 8,350 ng ng ng ng
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1 Statistical adjustment based on correlation between
3-, 7-, 15-, and 30-consecutive-day periods.
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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
1942 July 11 -- 845 1970 October 14 4.68 102
1943 May 24 8.95 1,120 1971 June 26 5.93 188
1944 June 23 9.28 1,080 1972 April 10 9.39 776
1945 April 4 8.10 900 1973 March 27 7.00 381
1946 April 8 7.89 850 1974 May 1 4.22 54.0
1947 May 1 8.67 975 1975 July 16 8.95 552
1948 April 27 8.20 1,020 1976 March 21 8.60 522
1949 July 14 -- 210 1977 March 13 5.52 27.0
1950 July 8 9.16 1,060 1978 April 19 11.59 929
1951 May 16 -- 959 1979 May 4 10.15 1,030
1952 June 3 10.36 1,410 1980 June 14 6.19 169
1953 May 27 -- 187 1981 July 19 4.16 27.0
1954 September 17 4.67 124 1982 April 16 8.25 414
1955 July 11 6.01 152 1983 November 29 6.63 150
1956 August 8 6.94 303 1984 April 14 11.00 978
1957 June 22 9.09 610 1985 March 31 9.19 860
1958 April 16 7.05 418 1986 May 7 12.12 1,820
1959 July 5 -- 43.0 1987 October 9 7.71 530
1960 June 11 7.31 131 1988 April 12 5.84 180
1961 September 14 5.16 125 1989 April 14 10.72 693
1962 August 6 11.52 1,620 1990 March 13 4.85 89.0
1963 June 18 8.65 945 1991 July 7 11.14 685
1964 April 22 5.44 209 1992 August 1 7.17 139
1965 June 9 11.05 1,320 1993 August 4 11.52 1,300
1966 April 29 8.77 921 1994 April 8 11.88 1,550
1967 April 17 7.33 530 1995 April 5 11.85 1,690
1968 April 23 3.94 58.0 1996 May 18 10.07 1,230
1969 April1 15.07 3,770 1997 April 20 16.90 8,750
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 20 16.90 8,750 1984 April 14 11.00 978
1969 April1 15.07 3,770 1947 May 1 8.67 975
1986 May 7 12.12 1,820 1951 May 16 -- 959
1995 April 5 11.85 1,690 1963 June 18 8.65 945
1962 August 6 11.52 1,620 1978 April 19 11.59 929
1994 April 8 11.88 1,550 1966 April 29 8.77 921
1952 June 3 10.36 1,410 1945 April 4 8.10 900
1965 June 9 11.05 1,320 1985 March 31 9.19 860
1993 August 4 11.52 1,300 1946 April 8 7.89 850
1996 May 18 10.07 1,230 1942 July 11 -- 845
1943 May 24 8.95 1,120 1972 April 10 9.39 776
1944 June 23 9.28 1,080 1989 April 14 10.72 693
1950 July 8 9.16 1,060 1991 July 7 11.14 685
1979 May 4 10.15 1,030 1957 June 22 9.09 610
1948 April 27 8.20 1,020 1975 July 16 8.95 552
1967 April 17 7.33 530 1955 July 11 6.01 152
1986 October 9 7.71 530 1982 November 29 6.63 150
1976 March 21 8.60 522 1992 August 1 7.17 139
1958 April 16 7.05 418 1960 June 11 7.31 131
1982 April 16 8.25 414 1961 September 14 5.16 125
1973 March 27 7.00 381 1954 September 17 4.67 124
1956 August 8 6.94 303 1969 October 14 4.68 102
1949 July 14 -- 210 1990 March 13 4.85 89.0
1964 April 22 5.44 209 1968 April 23 3.94 58.0
1971 June 26 5.93 188 1974 May 1 4.22 54.0
1953 May 27 -- 187 1959 July 5 -- 43.0
1988 April 12 5.84 180 1977 March 13 5.52 27.0
1980 June 14 6.19 169 1981 July 19 4.16 27.0
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1 Day of month unknown.
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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]
__________________________________________________________________________________________________________________________________
Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
__________________________________________________________________________________________________________________________________
1942 0 0 0 0 0 0 0 2.52 147.9 623.3 197.7 243.8 102.1
1943 45.7 0.150 0 0 0 5.97 325.3 935.3 680.7 324.3 35.9 6.85 197.7
1944 7.56 11.0 1.38 0 0 3.66 157.0 252.8 598.1 225.0 15.8 4.80 106.1
1945 2.82 1.26 0.097 0 0 15.9 375.2 41.4 214.0 5.87 3.21 1.15 54.5
1946 3.11 1.13 0.274 0 0 28.1 530.5 24.7 13.1 38.7 4.17 2.32 53.4
1947 3.12 10.5 4.44 1.70 0.811 6.16 271.5 592.1 433.4 453.5 9.04 5.98 150.2
1948 6.76 8.36 1.84 0.006 0 36.9 358.7 750.2 84.5 15.4 18.2 15.0 108.5
1949 0.623 0.700 0.219 0 0 19.7 8.26 2.02 2.84 64.9 4.53 1.51 8.91
1950 1.15 1.41 0.016 0 0 4.60 23.1 17.8 575.1 713.0 327.8 19.4 141.3
1951 4.87 20.5 20.0 6.38 1.02 3.88 185.9 820.4 330.7 69.6 29.5 4.94 125.7
1952 4.49 13.0 22.9 20.5 12.7 55.0 259.9 1,002 944.3 260.3 7.52 0.357 217.1
1953 0.426 0.477 0.068 0 0 28.9 9.86 74.0 57.9 60.2 33.4 15.6 23.6
1954 1.85 1.19 0 0 0 2.89 5.56 4.66 6.75 2.00 1.33 2.36 2.38
1955 1.31 0.847 0.084 0 0 4.12 5.91 1.66 2.81 18.1 3.69 0.720 3.30
1956 0.406 0.040 0 0 0 0.013 13.1 3.29 1.35 0.310 5.85 0.283 2.05
1957 0.161 0.697 0.129 0 0 1.20 24.3 235.1 324.4 134.4 14.8 24.8 63.5
1958 33.8 39.0 4.32 13.6 10.8 41.9 223.0 41.5 7.74 6.51 0.206 0.790 35.1
1959 0.123 0 0 0 0 1.50 0.603 1.45 4.36 3.75 0.087 0.003 0.994
1960 0.016 0 0 0 0 1.87 19.1 72.8 68.5 19.6 0.132 0 15.2
1961 0.042 0 0 0 0 1.40 5.37 6.38 .837 0 0.045 1.86 1.33
1962 0 0 0 0 0 0.142 127.5 412.5 788.3 1,035 1,130 259.9 315.5
1963 45.7 7.69 5.48 3.52 8.16 17.6 104.5 42.3 558.4 75.3 8.38 3.73 72.9
1964 1.46 1.15 0.761 0.455 0.217 0.252 107.9 95.1 20.9 5.73 0.397 1.30 19.6
1965 1.17 0.977 0.468 0 0 0 427.2 433.3 1,088 308.6 9.30 5.26 188.9
1966 59.8 84.2 28.9 20.1 53.0 58.8 332.0 729.2 431.0 8.30 6.64 1.15 151.2
1967 23.8 4.02 0 0 0 13.7 223.8 104.8 26.2 199.9 0.765 0.447 50.0
1968 0.342 0.030 0 0 0 0.016 7.61 7.59 3.55 0.694 0.058 0.043 1.66
1969 0.452 0.760 0.403 0.058 0 0 1,322 1,310 374.2 20.6 0.232 0 252.6
1970 1.82 0.310 0 0 0 1.56 14.4 4.30 5.27 0.039 0 0 2.30
1971 0 0.147 0.087 0 0 2.40 4.80 4.80 69.3 23.6 4.40 5.42 9.55
1972 0.448 2.50 1.74 1.58 0.266 100.0 630.9 250.6 303.8 25.5 105.5 18.1 119.4
1973 0.064 0.597 0.678 4.02 8.15 139.2 77.8 17.7 9.37 0.039 0.279 0.047 21.6
1974 0.016 0.001 0 0 0 8.86 8.11 9.56 3.77 0.123 0.349 0.150 2.59
1975 0.015 0.001 0 0 0 0 26.5 183.7 87.1 315.6 12.0 23.4 54.7
1976 1.49 0.256 0.078 0 21.5 221.2 133.8 4.21 0.018 0 0 0.227 31.9
1977 0 0 0 0 0 2.89 1.24 0.228 0.010 0.016 0.009 0.087 0.377
1978 0.212 1.02 0.011 0 0 3.88 623.4 718.8 520.0 415.6 108.2 18.4 201.5
1979 3.34 1.93 1.92 0.640 0.004 0.920 228.2 937.9 695.5 325.9 103.2 8.08 193.4
1980 7.20 7.28 9.09 9.35 11.9 40.7 23.3 25.5 62.2 12.8 1.83 1.47 17.7
1981 1.24 0.327 0.110 0 0.166 0.389 1.99 1.46 10.3 8.08 0.096 0.001 2.01
1982 0 0 0 0 0 3.89 200.5 99.5 3.57 5.43 0.188 0.024 26.0
1983 0.210 5.64 23.2 2.03 0 2.61 2.54 1.93 0.357 0.070 0 0 3.25
1984 0 0.002 0 0 1.94 6.19 716.9 311.8 426.2 281.2 103.8 0.718 153.5
1985 101.3 258.0 57.5 0.200 0.199 227.2 340.0 205.1 420.9 79.7 18.6 19.4 143.9
1986 8.43 5.17 3.66 4.54 6.84 55.3 720.6 1,092 1,103 722.8 151.1 61.9 329.0
1987 362.5 85.5 44.6 36.0 24.5 32.4 64.1 28.2 2.54 1.22 0.271 0.105 57.3
1988 22.4 8.57 4.57 0.310 0.009 9.70 41.7 4.82 0.452 0 0.005 0 7.70
1989 0.053 0.118 0 0 0 1.34 414.1 491.3 89.7 5.13 6.69 71.6 90.2
1990 10.1 11.5 6.57 0 0 21.9 6.98 11.0 8.24 2.12 0.075 1.06 6.68
1991 1.63 1.65 0.594 0.414 0.476 5.11 10.4 14.5 108.3 505.4 71.8 38.4 64.0
1992 58.5 0.830 0.781 0.650 1.38 8.93 10.4 2.93 6.64 22.4 92.4 0.239 17.4
1993 0.080 3.80 4.68 4.82 4.19 75.5 602.7 244.4 240.4 711.4 1,182 1,062 346.0
1994 534.6 20.9 6.57 6.61 7.25 199.0 1,088 1,105 489.7 689.0 139.5 7.22 360.2
1995 70.0 6.94 5.55 4.62 5.74 208.5 1,277 1,236 667.3 100.6 6.52 7.64 300.0
1996 271.8 307.3 25.3 8.67 16.3 628.4 841.6 723.2 187.4 5.81 4.17 0.475 252.1
1997 1.91 4.90 13.2 42.4 148.3 326.0 3,814 1,445 611.9 53.1 5.51 0.996 535.9
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U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 24-Aug-2004 12:38:24 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr00344/htdocs/ff.05050000.html |
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