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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 4.81 1963 0 m 0.540 1.18 2.19 0.37
November 5.87 1963 0 m 0.360 1.23 3.44 0.25
December 2.90 1963 0 m 0.140 0.59 4.19 0.10
January 0.103 1963 0 m 0 0.02 4.90 0
February 1.00 1976 0 m 0.070 0.22 3.40 0.05
March 138 1966 0 m 22.4 36.9 1.65 15.6
April 756 1997 0 m 62.7 132 2.11 43.5
May 160 1997 0 m 23.0 38.9 1.69 15.9
June 82.4 1997 0 m 12.9 19.8 1.54 8.92
July 103 1993 0 m 15.5 25.2 1.63 10.7
August 47.0 1993 0 m 4.66 10.3 2.21 3.23
September 20.6 1997 0 m 2.06 4.16 2.02 1.42
Annual 44.8 1969 0 m 8.36 9.94 1.19 100
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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 0 0 0 0 0 0 0 0 0
80 0 0 0 0.10 0 0 0 0 0 0 0 0 0
75 0 0 0 0.46 0.10 0 0 0 0 0 0 0 0
70 0 0 0 2.10 0.50 0 0 0 0 0 0 0 0
65 0 0 0 5.63 0.97 0.15 0 0 0 0 0 0 0
60 0 0 0 8.26 1.90 0.50 0 0 0 0 0 0 0
55 0 0 0 12.6 3.92 1.92 0.24 0 0 0 0 0 0
50 0 0 0 16.4 5.64 1.70 0.84 0 0 0 0 0 0
45 0 0 0 20.0 7.77 3.42 2.20 0 0 0 0 0 0
40 0 0 0.14 23.8 9.97 4.89 4.40 0.30 0 0 0 0 0
35 0 0 0.39 29.0 12.2 7.15 8.46 0.92 0.19 0 0 0 0.20
30 0 0 1.50 37.8 15.6 10.7 12.1 1.60 0.66 0 0 0 0.89
25 0 0 4.66 50.8 19.4 14.2 15.9 2.90 1.80 0 0 0 1.90
20 0 0 11.2 64.8 25.2 20.1 22.1 5.23 2.90 0.23 0 0 4.66
15 0 0 22.4 83.1 43.6 30.8 37.9 8.08 5.10 0.91 0.07 0 9.65
10 0 0 67.6 135 66.4 43.3 54.6 13.7 6.89 2.00 0.52 0 19.1
5 0 0 154 288 118 65.1 74.4 31.5 10.6 3.60 2.00 0.76 43.7
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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 ng 0 0 0 0
0.95 1.05 ng 0 0 0 0
0.90 1.11 ng 2.34 1.91 1.62 1.19
0.80 1.25 24.5 14.1 12.0 9.93 7.48
0.50 2 110 76.0 65.7 51.9 37.1
0.20 5 411 249 214 160 104
0.10 10 762 419 357 257 156
0.04 25 1,400 677 569 395 223
0.02 50 2,010 898 748 506 272
0.01 100 2,730 1,140 940 621 317
0.005 200 3,570 1,390 1,130 734 359
0.002 500 4,860 ng ng ng ng
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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
1960 April 15 4.80 102 1979 April 21 5.39 365
1961 March 27 2.25 2.50 1980 March 23 4.50 130
1962 July 6 5.69 135 1981 -- -- 0
1963 April 4 4.19 68.0 1982 April 17 2.88 20.0
1964 April 25 3.52 46.0 1983 October 9 2.45 7.60
1965 April 13 4.80 173 1984 March 28 4.62 150
1966 March 15 7.12 660 1985 March 18 3.20 38.0
1967 June 15 5.39 257 1986 April 20 5.51 361
1968 April 7 3.86 91.0 1987 March 30 4.06 138
1969 April 8 8.77 1,270 1988 February 27 -- 1.00
1970 June 16 3.21 39.0 1989 March 31 8.47 700
1971 March 16 4.04 70.0 1990 -- -- 0
1972 March 18 6.64 435 1991 July 3 3.29 25.0
1973 March 26 2.47 13.0 1992 June 22 3.50 25.0
1974 March 20 2.93 30.0 1993 March 28 6.12 300
1975 July 1 4.52 133 1994 March 21 7.08 400
1976 March 23 5.37 200 1995 March 14 7.98 500
1977 -- -- 0 1996 May 19 6.02 573
1978 March 29 7.64 600 1997 April 3 10.11 2,700
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 3 10.11 2,700 1980 March 23 4.50 130
1969 April 8 8.77 1,270 1960 April 15 4.80 102
1989 March 31 8.47 700 1968 April 7 3.86 91.0
1966 March 15 7.12 660 1971 March 16 4.04 70.0
1978 March 29 7.64 600 1963 April 4 4.19 68.0
1996 May 19 6.02 573 1964 April 25 3.52 46.0
1995 March 14 7.98 500 1970 June 16 3.21 39.0
1972 March 18 6.64 435 1985 March 18 3.20 38.0
1994 March 21 7.08 400 1974 March 20 2.93 30.0
1979 April 21 5.39 365 1991 July 3 3.29 25.0
1986 April 20 5.51 361 1992 June 22 3.50 25.0
1993 March 28 6.12 300 1982 April 17 2.88 20.0
1967 June 15 5.39 257 1973 March 26 2.47 13.0
1976 March 23 5.37 200 1983 October 9 2.45 7.60
1965 April 13 4.80 173 1961 March 27 2.25 2.50
1984 March 28 4.62 150 1988 February 27 -- 1.00
1987 March 30 4.06 138 1977 -- -- 0
1962 July 6 5.69 135 1981 -- -- 0
1975 July 1 4.52 133 1990 -- -- 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
__________________________________________________________________________________________________________________________________
1960 0 0 0 0 0 0.184 41.8 1.51 0.207 0.058 0 0 3.59
1961 0 0 0 0 0 0.623 0.353 0.552 0.007 0 0 0 0.129
1962 0 0 0 0 0 3.10 40.5 23.2 52.0 64.2 11.2 3.26 16.5
1963 4.81 5.87 2.90 0.103 0 7.96 20.5 14.4 24.3 9.59 4.05 3.89 8.21
1964 2.79 1.68 0.410 0 0 1.01 25.6 11.7 10.1 9.20 1.22 0.790 5.36
1965 0 0 0 0 0 0 64.0 16.3 14.9 11.0 0.648 0 8.86
1966 0 0 0 0 0 138.0 25.2 20.0 8.12 6.80 4.90 0.406 17.2
1967 1.24 0.095 0.006 0 0 23.5 38.1 35.0 61.4 27.5 1.13 0 15.7
1968 0 0 0 0 0 0.111 8.46 11.7 7.29 6.88 0 1.15 2.97
1969 0.445 0.076 0.060 0 0 0 347.5 64.3 48.4 46.3 24.7 9.07 44.8
1970 2.15 0.872 0.023 0 0 1.70 16.9 16.6 16.1 1.86 0 0 4.68
1971 0 0 0 0 0 9.88 3.90 0.208 0.419 0.023 0 0 1.21
1972 0 0 0 0 0 83.9 20.9 58.3 16.0 1.98 2.55 0 15.5
1973 0 0 0 0 0 5.15 2.11 0.006 0 0 0 0 0.612
1974 0 0 0 0 0 7.81 6.93 2.32 0.793 0 0 0 1.50
1975 0 0 0 0 0 0 1.72 8.22 6.71 28.2 0.983 3.52 4.16
1976 0.224 0.001 0 0 1.00 48.9 18.6 1.81 0 0 0 0 5.91
1977 0 0 0 0 0 0 0 0 0 0 0 0 0
1978 0 0 0 0 0 36.9 113.4 9.47 6.13 78.0 0.595 0 20.4
1979 0 0 0 0 0 0 111.4 20.6 4.42 1.63 1.84 0.268 11.6
1980 0 0 0 0 0 28.0 19.0 0.354 0.201 0 0 0 3.98
1981 0 0 0 0 0 0 0 0 0 0 0 0 0
1982 0 0 0 0 0 0.133 10.3 1.14 0.056 0.105 0.73 0.776 1.04
1983 1.79 -- -- -- -- 0.028 0 0 0 0 0 0 --
1984 0 0 0 0 0.555 18.3 43.3 8.96 5.06 3.54 0.834 0 6.69
1985 -- -- -- -- -- 9.39 6.05 0.652 0.110 0 0 0 --
1986 -- -- -- -- -- 0.955 92.3 69.3 11.6 44.7 12.6 7.07 --
1987 -- -- -- -- -- 39.2 35.5 11.4 3.21 0 0 0 --
1988 -- -- -- -- 0.093 0.046 0 0 0 0 0 0 --
1989 -- -- -- -- -- 40.7 149.2 8.53 1.67 0.114 0 0 --
1990 -- -- -- -- -- 0 0 0 0 0 0 0 --
1991 -- -- -- -- -- 0 0 0 1.63 9.16 1.77 0 --
1992 -- -- -- -- -- 0.343 0.191 0.237 6.80 8.36 0.514 0.723 --
1993 -- -- -- -- -- 29.2 68.4 7.23 16.4 102.6 47.0 8.44 --
1994 -- -- -- -- -- 83.2 89.7 45.6 4.41 14.0 2.69 2.62 --
1995 -- -- -- -- -- 128.4 74.3 87.0 36.7 30.8 10.6 6.32 --
1996 -- -- -- -- -- 101.4 131.2 156.6 41.7 16.6 10.4 9.22 --
1997 -- -- -- -- -- 4.36 755.7 159.8 82.4 65.1 36.7 20.6 --
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