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Last update: Wednesday, 23-Feb-2005 09:46:12 EST
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Statistics of monthly and annual mean discharges
[m, more than 1 year of occurrence; ng, statistic not given]
__________________________________________________________________________________________________________
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 5.15 1981 0 m 0.600 1.36 2.27 0.56
November 0.634 1988 0 m 0.090 0.21 2.37 0.08
December 0.036 1988 0 m 0.010 0.01 2.44 0.01
January 0 m 0 m 0 0 ng 0
February 5.68 1981 0 m 0.390 1.46 3.80 0.36
March 62.0 1985 0 m 9.91 17.3 1.75 9.33
April 208 1974 1.05 1973 64.4 63.4 0.98 60.6
May 159 1974 0.009 1973 15.0 31.7 2.12 14.1
June 32.0 1986 0 m 5.45 7.86 1.44 5.13
July 55.6 1993 0 m 4.02 10.4 2.58 3.79
August 140 1993 0 m 5.09 24.4 4.79 4.80
September 16.9 1994 0 m 1.29 3.43 2.67 1.21
Annual 22.2 1993 0.589 1963 8.60 7.27 0.85 100
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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 0 0 0 0 0 0 0 0 0
90 0 0 0 0 0 0 0 0 0 0 0 0 0
85 0 0 0 0.37 0 0 0 0 0 0 0 0 0
80 0 0 0 1.10 0 0 0 0 0 0 0 0 0
75 0 0 0 1.50 0.19 0 0 0 0 0 0 0 0
70 0 0 0 2.70 0.37 0.08 0 0 0 0 0 0 0
65 0 0 0 4.46 0.71 0.37 0 0 0 0 0 0 0
60 0 0 0 6.16 0.99 0.50 0 0 0 0 0 0 0
55 0 0 0 9.44 1.40 0.92 0.04 0 0 0 0 0 0
50 0 0 0 14.6 1.90 1.30 0.20 0 0 0 0 0 0
45 0 0 0 19.8 1.90 1.70 0.26 0 0 0 0 0 0
40 0 0 0 25.6 3.40 1.70 0.48 0 0 0 0 0 0
35 0 0 0 33.1 4.29 2.30 0.87 0 0 0 0 0 0.11
30 0 0 0.12 45.3 6.05 3.14 1.60 0.31 0 0 0 0 0.58
25 0 0 0.65 61.9 8.04 3.84 2.10 0.80 0 0 0 0 1.10
20 0 0 2.00 88.6 12.6 4.92 3.39 1.10 0.37 0.28 0 0 1.60
15 0 0 5.45 130 20.9 7.63 4.56 1.50 0.90 0.96 0.11 0 3.67
10 0 0 16.9 199 37.4 12.2 8.03 2.10 2.20 1.80 0.13 0 9.55
5 0 0 40.9 343 72.6 28.2 20.3 8.57 8.74 4.10 0.55 0.04 39.2
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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) (ft3/s)
__________________________________________________________________________________________________
0.99 1.01 6.70 2.86 2.67 1.94 1.37
0.95 1.05 22.5 11.7 9.88 6.77 4.60
0.90 1.11 40.3 23.0 18.6 12.5 8.36
0.80 1.25 77.4 48.4 38.1 25.1 16.5
0.50 2 230 163 126 82.3 52.5
0.20 5 564 428 340 227 141
0.10 10 837 645 528 360 222
0.04 25 1,210 936 800 563 343
0.02 50 1,500 1,150 1,020 732 444
0.01 100 1,790 1,360 1,240 912 551
0.005 200 2,070 1,560 1,470 1,100 662
0.002 500 2,430 ng ng ng ng
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Probability of occurrence of annual low discharges
[ng, statistic not given]
____________________________________________________________________________
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 ng ng ng ng ng ng ng ng ng
0.10 10 ng ng ng ng ng ng ng ng ng
0.20 5 ng ng ng ng ng ng ng ng ng
0.50 2 ng ng ng ng ng ng ng ng ng
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Probability of occurrence of seasonal low discharges
[ng, statistic not given]
_____________________________________________________________________________________
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 ng ng ng ng ng ng 0 0
0.10 10 ng ng ng ng ng ng 0 0
0.20 5 ng ng ng ng ng ng 0 0
0.50 2 ng ng ng ng ng ng 0 0.096
June-July-August September-October-November
_________________________ ______________________
0.05 20 0 0 0 0 ng ng ng ng
0.10 10 0 0 0 0 ng ng ng ng
0.20 5 0 0 0 0 ng ng ng ng
0.50 2 0 0 0 0 ng ng ng ng
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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
1962 April 20 1,531.73 305 1979 April 24 1,533.00 777
1963 June 25 1,528.95 9.20 1980 May 29 1,532.27 310
1964 April 16 1,529.57 22.8 1981 May 22 1,530.96 126
1965 April 13 1,531.36 202 1982 April 14 1,532.80 350
1966 March 29 1,533.86 305 1983 April 7 1,531.49 155
1967 April 24 1,532.42 392 1984 June 10 1,530.45 68.0
1968 April 9 1,529.33 17.6 1985 March 22 1,532.92 484
1969 April 15 1,532.23 377 1986 March 28 1,533.79 643
1970 April 27 1,532.23 372 1987 April 6 1,534.57 943
1971 April 12 1,532.93 630 1988 April 3 1,530.80 55.0
1972 March 21 1,531.35 138 1989 April 19 1,532.59 392
1973 March 18 -- 67.0 1990 April 7 1,531.64 137
1974 April 21 1,533.00 670 1991 May 31 1,531.75 133
1975 April 15 1,530.47 59.0 1992 April 1 1,534.10 685
1976 April 7 1,532.47 455 1993 August 3 1,533.25 317
1977 September 8 1,529.91 29.0 1994 April 2 1,533.99 784
1978 April 11 1,532.44 378
Annual peak discharge, from highest to lowest, and corresponding gage height
1987 April 6 1,534.57 943 1962 April 20 1,531.73 305
1994 April 2 1,533.99 784 1966 March 29 1,533.86 305
1979 April 24 1,533.00 777 1965 April 13 1,531.36 202
1992 April 1 1,534.10 685 1983 April 7 1,531.49 155
1974 April 21 1,533.00 670 1972 March 21 1,531.35 138
1986 March 28 1,533.79 643 1990 April 7 1,531.64 137
1971 April 12 1,532.93 630 1991 May 31 1,531.75 133
1985 March 22 1,532.92 484 1981 May 22 1,530.96 126
1976 April 7 1,532.47 455 1984 June 10 1,530.45 68.0
1967 April 24 1,532.42 392 1973 March 18 -- 67.0
1989 April 19 1,532.59 392 1975 April 15 1,530.47 59.0
1978 April 11 1,532.44 378 1988 April 3 1,530.80 55.0
1969 April 15 1,532.23 377 1977 Sept. 8 1,529.91 29.0
1970 April 27 1,532.23 372 1964 April 16 1,529.57 22.8
1982 April 14 1,532.80 350 1968 April 9 1,529.33 17.6
1993 August 3 1,533.25 317 1963 June 25 1,528.95 9.20
1980 May 29 1,532.27 310
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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
__________________________________________________________________________________________________________________________________
1962 -- -- -- -- -- 0 62.2 2.38 2.93 0.106 0 0 --
1963 0 0 0 0 0 0.361 1.06 0.084 3.82 1.43 0.313 0.020 0.589
1964 0 0 0 0 0 0 9.45 0.887 0.510 0.223 0 0 0.910
1965 0 0 0 0 0 0 49.7 11.7 1.89 0.032 0 0 5.24
1966 0 0 0 0 0 49.9 89.9 46.8 5.23 2.03 1.34 0.363 16.3
1967 0 0 0 0 0 1.84 103.6 60.1 2.38 0.068 0 0 14.0
1968 0 -- -- -- -- 2.53 6.23 0.034 0 0 0 0 --
1969 0 -- -- -- -- -- 129.3 6.37 13.0 5.29 1.19 -- --
1970 0 -- -- -- -- 0 114.7 31.9 27.6 21.3 1.57 0.293 --
1971 -- -- -- -- -- 0 206.2 12.8 3.23 1.17 0 0 --
1972 0 -- -- -- -- 28.9 40.2 4.94 0.584 0 0 0 --
1973 0 -- -- -- -- 10.6 1.05 0.009 0 0 0 0 --
1974 0 -- -- -- -- 0 207.7 159.1 16.0 0.864 0 0 --
1975 0 -- -- -- -- 0 18.6 10.3 0.170 0.079 0 0 --
1976 0 -- -- -- -- 0 120.7 2.15 0.843 0.305 0.125 0 --
1977 0 -- -- -- -- 0.018 2.79 0.061 0 0 0 3.55 --
1978 0.015 -- -- -- -- 0.161 107.0 7.18 1.10 1.00 0.065 0 --
1979 0 -- -- -- -- 0 177.9 80.5 0.844 8.83 3.98 8.03 --
1980 4.57 -- -- -- -- 0.155 14.8 7.89 3.49 1.14 1.66 2.03 --
1981 5.15 -- -- -- 5.68 12.9 4.17 2.08 1.11 0.419 0.913 0.197 --
1982 0.316 -- -- -- -- 1.13 33.4 5.87 5.00 3.92 0.148 0.012 --
1983 2.55 -- -- -- -- 17.7 35.9 2.94 0.971 0.391 0.168 0 --
1984 0 -- -- -- -- 4.73 3.80 1.65 8.96 0.031 0 0 --
1985 0 -- -- -- -- 62.0 18.4 0.827 7.50 15.0 8.92 3.15 --
1986 2.79 -- -- 0 0 50.4 38.6 11.8 32.0 5.00 2.95 0.108 --
1987 0.037 0 0 0 0 0 155.2 0.384 1.01 0.015 1.74 0.075 13.0
1988 1.87 0.634 0.036 0 0.100 1.73 8.06 0.050 0 0 0 0 1.03
1989 0 0 0 0 0 0 33.9 2.04 0.056 0 0 0 2.96
1990 0 0 0 0 0 2.33 31.2 1.30 15.3 0.225 0.105 0.014 4.16
1991 0 0 0 0 0 6.89 2.38 4.76 14.0 6.99 0.998 0 3.01
1992 0.013 0.046 0 0 0 39.5 142.6 5.32 0.868 0.972 0 0 15.6
1993 0 0 0 0 0 0.789 46.0 6.49 8.08 55.6 140.5 6.40 22.2
1994 1.27 0.457 0.035 0 0 22.4 107.5 3.47 1.36 0.355 1.37 16.9 12.8
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U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:46:12 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05099150.html |
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