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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 56.5 1995 0 m 2.30 9.67 4.21 1.57
November 16.4 1995 0 m 1.11 4.08 3.68 0.76
December 1.35 1995 0 m 0.09 0.34 3.79 0.06
January 0.080 1995 0 m 0 0.02 4.12 0
February 5.68 1981 0 m 0.32 1.34 4.17 0.22
March 122 1995 0 m 12.6 25.4 2.02 8.57
April 344 1997 1.05 1973 80.7 87.1 1.08 55.1
May 159 1974 0.009 1973 21.0 39.1 1.86 14.3
June 58.0 1995 0 m 6.84 11.6 1.69 4.67
July 189 1997 0 m 10.1 32.6 3.24 6.87
August 161 1995 0 m 9.53 34.9 3.66 6.50
September 28.6 1995 0 m 2.02 5.67 2.81 1.38
Annual 57.9 1997 0.589 1963 16.1 18.0 1.12 100
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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 0.26 0 0 0 0 0 0 0 0 0
80 0 0 0 0.93 0.04 0 0 0 0 0 0 0 0
75 0 0 0 1.70 0.29 0 0 0 0 0 0 0 0
70 0 0 0 2.40 0.57 0.22 0 0 0 0 0 0 0
65 0 0 0 4.69 0.79 0.42 0 0 0 0 0 0 0
60 0 0 0 6.77 1.50 0.78 0 0 0 0 0 0 0
55 0 0 0 10.8 1.50 1.10 0.15 0 0 0 0 0 0
50 0 0 0 16.7 2.20 1.50 0.30 0 0 0 0 0 0
45 0 0 0 22.4 3.31 1.50 0.42 0 0 0 0 0 0
40 0 0 0 29.4 4.50 2.00 0.82 0.04 0 0 0 0 0.08
35 0 0 0 38.7 6.43 2.98 1.60 0.37 0 0 0 0 0.51
30 0 0 0.04 52.6 9.33 3.51 1.60 0.72 0 0.04 0 0 1.00
25 0 0 0.54 75.5 14.4 4.26 3.34 1.00 0.27 0.35 0.04 0 2.10
20 0 0 1.70 104 21.1 5.71 4.57 1.40 0.60 0.86 0.11 0 3.48
15 0 0 5.88 154 33.5 8.59 7.67 1.90 1.30 2.10 0.17 0 7.46
10 0 0 18.1 243 52.5 13.8 15.2 4.34 4.15 3.41 0.61 0.04 23.0
5 0 0 60.8 426 103 30.9 37.8 21.6 11.9 5.51 5.50 0.70 71.9
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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 7.00 3.18 2.85 2.02 1.41
0.95 1.05 24.1 14.2 11.7 7.92 5.37
0.90 1.11 43.9 29.1 23.4 15.5 10.3
0.80 1.25 85.8 64.2 50.4 33.2 21.7
0.50 2 264 233 184 122 77.0
0.20 5 666 646 533 370 225
0.10 10 1,000 1980 856 616 366
0.04 25 1,470 11,450 1,340 1,010 585
0.02 50 1,840 1,830 1,730 1,350 771
0.01 100 2,210 2,180 2,130 1,720 971
0.005 200 2,570 2,520 12,320 2,110 1,180
0.002 500 3,040 ng ng ng ng
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1Statistical 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
1962 April 20 1,531.73 305 1980 May 29 1,532.27 310
1963 June 25 1,528.95 9.20 1981 May 22 1,530.96 126
1964 April 16 1,529.57 22.8 1982 April 14 1,532.80 350
1965 April 13 1,531.36 202 1983 April 7 1,531.49 155
1966 March 29 1,533.86 305 1984 June 10 1,530.45 68.0
1967 April 24 1,532.42 392 1985 March 22 1,532.92 484
1968 April 9 1,529.33 17.6 1986 March 28 1,533.79 643
1969 April 15 1,532.23 377 1987 April 6 1,534.57 943
1970 April 27 1,532.23 372 1988 April 3 1,530.80 55.0
1971 April 12 1,532.93 630 1989 April 19 1,532.59 392
1972 March 21 1,531.35 138 1990 April 7 1,531.64 137
1973 March 18 -- 67.0 1991 May 31 1,531.75 133
1974 April 21 1,533.00 670 1992 April 1 1,534.10 685
1975 April 15 1,530.47 59.0 1993 August 3 1,533.25 317
1976 April 7 1,532.47 455 1994 April 2 1,533.99 784
1977 September 8 1,529.91 29.0 1995 March 25 1,534.23 625
1978 April 11 1,532.44 378 1996 April 16 1,534.39 1,110
1979 April 24 1,533.00 777 1997 April 23 1,534.81 1,470
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 23 1,534.81 1,470 1993 August 3 1,533.25 317
1996 April 16 1,534.39 1,110 1980 May 29 1,532.27 310
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
1995 March 25 1,534.23 625 1981 May 22 1,530.96 126
1985 March 22 1,532.92 484 1984 June 10 1,530.45 68.0
1976 April 7 1,532.47 455 1973 March 18 -- 67.0
1967 April 24 1,532.42 392 1975 April 15 1,530.47 59.0
1989 April 19 1,532.59 392 1988 April 3 1,530.80 55.0
1978 April 11 1,532.44 378 1977 September 8 1,529.91 29.0
1969 April 15 1,532.23 377 1964 April 16 1,529.57 22.8
1970 April 27 1,532.23 372 1968 April 9 1,529.33 17.6
1982 April 14 1,532.80 350 1963 June 25 1,528.95 9.20
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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
1995 56.5 16.4 1.35 0.080 0 122.5 117.8 67.6 58.0 9.65 161.1 28.6 53.7
1996 2.60 0.111 0 0 0 0 319.8 39.0 6.78 30.5 10.8 0.795 33.9
1997 0.448 0.089 0 0 0 0 344.5 153.5 1.53 189.2 3.14 0.086 57.9
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