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Last update: Tuesday, 31-Aug-2004 10:28:55 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 11.4 1983 0 m 0.660 1.86 2.83 0.57
November 3.50 1983 0 m 0.570 0.88 1.55 0.50
December 1.24 1963 0 m 0.130 0.27 2.03 0.12
January 0.448 1987 0 m 0.010 0.07 4.85 0.01
February 2.21 1976 0 m 0.130 0.44 3.42 0.11
March 136 1984 0 m 20.8 28.0 1.34 18.2
April 382 1979 1.12 1981 59.9 82.0 1.37 52.2
May 81.3 1949 0.119 1955 10.7 15.5 1.45 9.33
June 48.9 1953 0.009 1988 9.13 12.3 1.34 7.95
July 168 1993 0 m 10.1 26.5 2.62 8.82
August 22.3 1993 0 m 1.25 4.43 3.55 1.09
September 40.1 1994 0 m 1.26 5.84 4.62 1.10
Annual 34.1 1975 0.678 1977 9.55 8.69 0.91 100
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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 0.42 0 0 0 0 0 0 0 0
85 0 0 0 1.40 0.79 0.04 0 0 0 0 0 0 0
80 0 0 0 2.00 1.10 0.17 0 0 0 0 0 0 0
75 0 0 0 3.23 1.10 0.32 0 0 0 0 0 0 0
70 0 0 0 3.83 1.50 0.61 0 0 0 0 0 0 0
65 0 0 0 4.70 2.00 0.83 0.02 0 0 0 0 0 0
60 0 0 0 6.17 2.00 1.10 0.08 0 0 0 0 0 0
55 0 0 0 7.68 3.25 1.10 0.16 0 0 0 0 0 0
50 0 0 0 10.4 3.94 1.60 0.32 0 0 0 0 0 0
45 0 0 0.15 13.7 4.46 2.10 0.45 0 0 0 0.10 0 0.10
40 0 0 0.85 17.0 5.44 3.20 0.64 0 0 0 0.18 0 0.20
35 0 0 2.40 22.1 6.04 4.03 0.90 0 0 0 0.26 0 0.43
30 0 0 4.29 28.6 8.12 4.75 1.30 0.02 0 0 0.53 0.02 0.92
25 0 0 8.18 38.6 10.2 6.67 1.80 0.09 0.02 0.10 0.76 0.10 2.00
20 0 0 16.0 54.7 12.5 8.97 3.76 0.16 0.10 0.27 0.91 0.10 3.36
15 0 0 26.3 88.1 17.2 13.4 6.91 0.48 0.24 0.59 1.30 0.26 5.17
10 0 0 58.9 155 23.9 19.9 16.2 1.40 0.77 0.98 1.90 0.37 12.9
5 0.08 0.18 122 275 41.0 37.6 43.0 5.86 3.39 2.70 2.70 0.52 35.4
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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 12.9 8.39 5.40 3.56 2.92
0.95 1.05 33.9 21.2 14.2 9.59 7.08
0.90 1.11 55.8 34.5 23.4 15.9 11.2
0.80 1.25 100 61.3 42.2 28.6 19.1
0.50 2 293 179 124 82.7 50.9
0.20 5 806 501 344 220 128
0.10 10 1,330 844 571 355 202
0.04 25 2,240 1,450 964 578 324
0.02 50 3,100 2,060 1,340 781 435
0.01 100 4,130 2,790 1,790 1,020 564
0.005 200 5,340 3,680 2,320 1,280 712
0.002 500 7,240 ng ng ng ng
__________________________________________________________________________________________________
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Probability of annual low discharges
[ng, statistic not given]
____________________________________________________________________________________
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 ng ng ng ng ng ng 0 0 0
0.10 10 ng ng ng ng ng ng 0 0 0
0.20 5 ng ng ng ng ng ng 0 0 0
0.50 2 ng ng ng ng ng ng 0 0 0.044
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Probability of seasonal low discharges
[ng, statistic not given]
_____________________________________________________________________________________
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 ng ng ng ng 0 0 0 0
0.10 10 ng ng ng ng 0 0 0 0
0.20 5 ng ng ng ng 0 0 0 0.232
0.50 2 ng ng ng ng 0 0 0 1.90
June-July-August September-October-November
_________________________ __________________________
0.05 20 0 0 0 0 ng 0 0 0
0.10 10 0 0 0 0 ng 0 0 0
0.20 5 0 0 0 0 ng 0 0 0
0.50 2 0 0 0 0 ng 0 0 0
_____________________________________________________________________________________
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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 1971 April 2 6.20 97.0
1948 April 11 -- 590 1972 April 14 7.05 252
1949 March 31 -- 400 1973 March 15 8.47 200
1950 April 7 -- 620 1974 April 12 9.27 790
1951 March 28 8.60 368 1975 April 18 11.62 2,550
1952 April 1 9.70 600 1976 March 24 9.93 150
1953 June 16 8.63 1,050 1977 May 31 5.02 41.0
1954 April 6 4.90 120 1978 March 29 8.99 375
1955 March 31 9.00 200 1979 April 19 10.37 3,490
1956 April 13 -- 250 1980 March 24 -- 63.0
1957 June 24 5.58 115 1981 May 27 5.14 22.0
1958 July 5 5.40 77.0 1982 April 3 10.55 710
1959 June 10 6.25 100 1983 June 22 8.07 428
1960 April 6 8.09 437 1984 March 29 -- 987
1961 March 6 6.06 25.0 1985 March 18 -- 164
1962 April 5 10.30 450 1986 July 11 10.12 767
1963 April 7 5.30 68.0 1987 March 20 7.98 475
1964 April 5 6.70 100 1988 April 1 -- 30.0
1965 April 11 11.60 900 1989 April 2 -- 602
1966 March 31 9.16 300 1990 June 4 6.01 64.0
1967 April 17 7.82 384 1991 May 25 -- 43.0
1968 June 8 7.07 190 1992 July 1 7.82 255
1969 April 10 11.41 1,690 1993 July 17 -- 2,970
1970 April 6 9.41 380 1994 March 19 9.47 470
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 19 10.37 3,490 1983 June 22 8.07 428
1993 July 17 -- 2,970 1949 March 31 -- 400
1975 April 18 11.62 2,550 1967 April 17 7.82 384
1969 April 10 11.41 1,690 1970 April 6 9.41 380
1947 April 14 8.90 1,230 1978 March 29 8.99 375
1953 June 16 8.63 1,050 1951 March 28 -- 368
1984 March 29 -- 987 1966 March 31 9.16 300
1965 April 11 11.60 900 1992 July 1 7.82 255
1974 April 12 9.27 790 1972 April 14 7.05 252
1986 July 11 10.12 767 1956 April 13 -- 250
1982 April 3 10.55 710 1955 March 31 9.00 200
1950 April 7 -- 620 1973 March 15 8.47 200
1989 April 2 -- 602 1968 June 8 7.07 190
1952 April 1 9.70 600 1985 March 18 -- 164
1948 April 11 -- 590 1976 March 24 9.93 150
1987 March 20 7.98 475 1954 April 6 -- 120
1994 March 19 9.47 470 1957 June 24 5.58 115
1962 April 5 10.30 450 1959 June 10 6.25 100
1960 April 6 8.09 437 1964 April 5 6.70 100
1971 April 2 6.20 97.0 1991 May 25 -- 43.0
1958 July 5 5.40 77.0 1977 May 31 5.02 41.0
1963 April 7 5.30 68.0 1988 April 1 -- 30.0
1990 June 4 6.01 64.0 1961 March 6 6.06 25.0
1980 April 1 -- 63.0 1981 May 27 5.14 22.0
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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
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U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 31-Aug-2004 10:28:55 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr97416/htdocs/f.05060500.html |
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