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Last update: Tuesday, 31-Aug-2004 10:28:54 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 49.1 1972 0 m 7.94 11.8 1.49 0.92
November 36.2 1972 0 1961 8.84 8.28 0.94 1.02
December 12.2 1963 0 1961 3.70 3.32 0.90 0.43
January 4.30 1973 0 m 1.12 1.25 1.12 0.13
February 4.85 1973 0 m 0.620 1.12 1.81 0.07
March 1,040 1966 0 m 95.1 208 2.18 11.0
April 1,710 1969 13.9 1959 385 435 1.13 44.6
May 620 1950 6.30 1955 104 145 1.40 12.0
June 353 1947 1.71 1961 94.2 160 1.70 10.9
July 2,380 1975 0 1961 132 434 3.29 15.3
August 267 1962 0 m 20.8 48.1 2.31 2.41
September 65.8 1962 0 m 11.0 15.0 1.35 1.28
Annual 374 1975 11.1 1954 73.5 78.8 1.07 100
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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 9.52 6.39 3.65 0.58 0 0 0 0.05 0 0
90 0 0 0 16.8 8.53 4.86 1.20 0 0 0 1.30 0.10 0
85 0 0 0 21.0 10.8 5.52 3.12 0.20 0 0 1.90 0.40 0.08
80 0 0 0 28.8 14.2 7.39 4.25 0.38 0.10 0.26 2.30 0.72 0.29
75 0.10 0 0.05 37.7 16.5 9.09 6.24 0.74 0.20 0.65 2.80 0.87 0.67
70 0.10 0 0.10 46.0 19.0 11.3 7.44 1.40 0.38 1.00 3.40 1.10 1.00
65 0.12 0 0.15 54.8 21.6 13.9 8.47 2.00 0.94 1.30 4.20 1.30 1.60
60 0.18 0.02 0.15 67.1 24.6 16.5 11.1 3.28 1.50 2.10 4.20 1.50 3.12
55 0.38 0.10 0.31 85.3 28.2 19.8 12.9 4.14 2.30 2.70 5.50 1.90 4.01
50 0.46 0.10 0.67 109 32.1 23.6 15.6 4.69 2.90 3.40 5.99 2.30 4.60
45 0.67 0.20 2.56 136 36.8 29.4 18.0 6.27 3.60 3.40 6.47 2.80 6.70
40 0.98 0.20 5.71 170 43.3 34.8 21.1 7.58 5.21 4.68 6.82 3.30 9.55
35 0.98 0.30 11.3 218 54.9 40.0 24.9 10.2 6.51 5.22 7.17 3.30 13.7
30 1.20 0.43 18.4 289 75.6 45.2 30.6 12.8 7.94 5.96 8.34 4.10 18.3
25 1.70 0.43 27.8 382 98.0 54.9 39.0 16.0 13.0 7.05 11.5 5.49 25.5
20 1.70 0.76 41.4 512 120 69.8 54.9 20.9 18.2 8.77 13.8 6.30 35.9
15 2.60 1.10 84.1 695 153 100 74.7 30.1 25.0 12.8 17.7 7.23 56.0
10 3.10 1.90 207 1,020 235 158 122 44.6 32.6 22.2 21.9 8.12 103
5 3.70 3.40 521 1,950 425 363 362 72.5 47.0 34.3 27.8 11.2 295
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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 47.6 43.5 35.3 26.6 22.5
0.95 1.05 131 119 91.7 66.6 50.2
0.90 1.11 219 197 150 107 76.7
0.80 1.25 396 355 267 187 127
0.50 2 1,140 1,020 771 524 329
0.20 5 2,980 2,650 2,090 1,390 832
0.10 10 4,740 4,220 3,420 2,260 1,340
0.04 25 7,560 6,740 5,700 3,730 2,200
0.02 50 10,100 8,990 7,850 5,120 3,030
0.01 100 12,900 11,500 10,400 6,770 4,030
0.005 200 16,100 14,400 13,400 8,700 5,220
0.002 500 20,700 ng ng ng ng
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Probability of annual low discharges
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Minimum average 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 0.165 0.450
0.10 10 0 0 0 0 0 0 0 0.303 0.738
0.20 5 0 0 0 0 0 0 0.044 0.525 1.18
0.50 2 0 0 0 0 0 0.103 0.436 1.35 2.74
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Probability of seasonal low discharges
_____________________________________________________________________________________
Minimum average 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 0.09
0.20 5 0 0 0 0 0 0 0 0.71
0.50 2 0 0.02 0.08 0.16 0 0.14 0.50 8.09
June-July-August September-October-November
_________________________ ___________________________
0.05 20 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0.15 0 0 0 0
0.20 5 0.02 0.15 0.24 0.68 0 0 0 0.18
0.50 2 1.42 2.04 2.66 4.90 0.46 0.64 0.83 1.87
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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
1944 April 8 8.16 177 1961 March 10 1.42 49.0
1945 April 12 8.59 373 1962 April 5 12.48 2,740
1946 March 21 13.15 550 1963 April 8 7.19 779
1947 April 14 18.04 3,880 1964 April 15 5.65 314
1948 April 7 17.28 1,500 1965 April 12 13.22 3,210
1949 April 3 14.75 850 1966 March 17 13.46 3,610
1950 April 2 17.73 1,980 1967 April 21 9.29 1,420
1951 April 7 12.50 750 1968 June 23 5.20 302
1952 April 6 18.90 3,850 1969 April 11 14.00 7,000
1953 June 17 18.62 4,840 1970 May 30 12.39 3,340
1954 March 21 8.62 200 1971 March 19 6.82 778
1955 April 2 12.40 500 1972 March 17 12.27 2,430
1956 April 14 11.51 630 1973 March 15 -- 1,300
1957 June 14 8.52 430 1974 April 13 10.30 1,970
1958 April 10 7.57 195 1975 July 2 15.03 11,600
1959 June 12 5.58 1,160 1976 March 27 7.50 1,000
1960 April 7 5.65 1,220
Annual peak discharge, from highest to lowest, and corresponding gage height
1975 July 2 15.03 11,600 1976 March 27 7.50 1,000
1969 April 11 14.00 7,000 1949 April 3 14.75 850
1953 June 17 18.62 4,840 1963 April 8 7.19 779
1947 April 14 18.04 3,880 1971 March 19 6.82 778
1952 April 6 18.90 3,850 1951 April 7 12.50 750
1966 March 17 13.46 3,610 1956 April 14 11.51 630
1970 May 30 12.39 3,340 1946 March 21 13.15 550
1965 April 12 13.22 3,210 1955 April 2 12.40 500
1962 April 5 12.48 2,740 1957 June 14 8.52 430
1972 March 17 12.27 2,430 1945 April 12 8.59 373
1950 April 2 17.73 1,980 1964 April 15 5.65 314
1974 April 13 10.30 1,970 1968 June 23 5.20 302
1948 April 7 17.28 1,500 1954 March 21 8.62 200
1967 April 21 9.29 1,420 1958 April 10 7.57 195
1973 March 15 -- 1,300 1944 April 8 8.16 177
1960 April 7 5.65 1,220 1961 March 10 1.42 49.0
1959 June 12 5.58 1,160
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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 -- -- -- -- -- -- 59.1 56.3 23.2 12.9 12.9 9.95 --
1945 5.06 14.5 4.84 0.329 0 93.2 86.4 25.2 16.5 3.60 3.37 0.467 21.2
1946 1.32 2.35 0.794 0.100 0.032 115.8 69.8 8.82 9.37 4.41 0.042 0.127 17.9
1947 5.96 5.48 1.28 0.129 0 100.7 945.6 59.3 353.2 17.9 1.02 4.04 123.4
1948 2.38 6.48 5.61 2.58 0.324 6.33 517.5 51.3 19.5 13.8 9.14 1.55 52.4
1949 0.694 6.20 1.75 0.042 0 8.96 209.1 15.4 8.07 7.26 0.229 0 21.3
1950 0.474 2.73 1.00 0.042 0 86.1 926.7 619.6 76.7 65.2 6.46 2.46 149.0
1951 4.29 3.55 1.36 0.710 0.200 7.37 234.1 16.1 11.6 11.4 6.02 10.8 25.4
1952 4.61 6.10 6.32 1.45 0.355 0.242 905.9 25.7 6.67 48.7 0.552 0.007 82.7
1953 0 1.75 1.99 1.42 1.47 25.0 21.0 88.5 716.5 63.4 51.1 1.78 80.7
1954 0.797 5.90 5.17 2.48 3.57 38.4 37.1 14.1 6.52 12.9 2.56 3.15 11.1
1955 0.787 3.37 3.05 1.48 0.250 0.184 117.9 6.30 13.4 63.2 9.47 0.280 18.3
1956 0.619 1.99 0.632 0.016 0 0 114.1 27.3 13.6 2.90 0.487 0.243 13.4
1957 0.019 7.42 1.89 0.497 0.150 7.10 27.1 13.5 54.3 13.8 15.2 25.5 13.8
1958 10.3 19.4 7.33 2.35 0.586 31.8 74.8 16.9 15.7 42.4 3.09 5.11 19.2
1959 1.90 2.46 0.306 0 0 10.2 13.9 8.35 113.2 21.0 1.10 0 14.3
1960 0.771 1.84 1.10 0.823 0.400 70.3 360.2 15.8 5.82 2.01 0 0 37.9
1961 0 0 0 0 0 30.1 18.0 17.3 1.71 0 0 3.98 5.98
1962 22.8 3.38 2.05 0.442 0.171 0.913 693.4 212.6 170.4 760.9 267.2 65.8 184.3
1963 30.5 28.4 12.2 0.765 0 15.5 159.7 33.2 34.9 12.6 6.67 5.63 28.3
1964 3.15 5.12 1.06 0.100 0.100 5.87 110.8 39.1 49.2 17.1 8.65 4.00 20.2
1965 4.00 6.69 1.38 1.20 0.561 0.300 1,149 92.5 42.4 64.6 58.2 40.1 120.6
1966 38.4 21.2 10.9 3.07 1.09 1,040 456.7 149.5 43.3 22.6 21.1 8.65 152.8
1967 6.33 6.02 1.88 0.817 0.851 78.7 379.0 168.7 28.8 6.55 1.22 0.651 56.6
1968 2.97 5.25 2.46 0.267 0.166 46.6 61.5 30.8 116.2 41.2 11.8 6.17 27.0
1969 5.35 6.91 3.01 0.049 0 0 1,708 151.5 35.6 373.4 35.5 22.0 194.0
1970 15.7 13.3 7.10 3.78 2.13 41.3 522.3 428.5 477.9 32.9 7.05 27.4 131.3
1971 9.00 12.3 2.11 0.486 0.002 206.5 129.8 27.5 38.8 54.7 5.80 27.7 43.1
1972 49.1 36.2 11.2 3.57 1.94 478.0 271.9 374.8 108.4 41.7 52.1 28.9 122.3
1973 7.17 14.4 6.70 4.30 4.85 402.5 79.9 23.7 8.09 1.04 1.93 12.7 47.8
1974 9.16 7.63 3.81 0.228 0.052 0.328 557.8 171.7 49.2 13.5 16.0 7.14 69.3
1975 2.51 15.7 4.53 1.16 0 0.941 1,305 327.6 345.5 2,375 50.3 27.2 373.7
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U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 31-Aug-2004 10:28:54 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr97416/htdocs/f.05060000.html |
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