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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 2.25 1983 0 m 0.110 0.43 4.06 0.15
November 0.162 1983 0 m 0.010 0.03 4.20 0.01
December 0.337 1983 0 m 0.010 0.06 5.29 0.02
January 0 m 0 m 0 0 ng 0
February 4.71 1981 0 m 0.170 0.91 5.20 0.26
March 49.2 1985 0 m 7.28 13.6 1.87 10.7
April 171 1974 0.037 1973 42.2 48.8 1.16 61.9
May 42.6 1974 0 m 4.10 8.56 2.09 6.02
June 122 1970 0 m 9.79 25.9 2.64 14.4
July 30.4 1965 0 m 3.04 7.74 2.55 4.46
August 16.5 1963 0 m 1.04 3.44 3.30 1.53
September 11.9 1968 0 m 0.450 2.25 4.97 0.66
Annual 18.0 1970 0.219 1973 5.69 4.76 0.84 100
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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
85 0 0 0 0 0 0 0 0 0 0 0 0 0
80 0 0 0 0.08 0 0 0 0 0 0 0 0 0
75 0 0 0 0.17 0 0 0 0 0 0 0 0 0
70 0 0 0 0.48 0 0 0 0 0 0 0 0 0
65 0 0 0 0.69 0.04 0 0 0 0 0 0 0 0
60 0 0 0 0.98 0.08 0 0 0 0 0 0 0 0
55 0 0 0 2.00 0.15 0 0 0 0 0 0 0 0
50 0 0 0 3.32 0.27 0 0 0 0 0 0 0 0
45 0 0 0 4.58 0.36 0 0 0 0 0 0 0 0
40 0 0 0 7.09 0.49 0.03 0 0 0 0 0 0 0
35 0 0 0 12.1 0.66 0.08 0 0 0 0 0 0 0
30 0 0 0 19.8 0.89 0.16 0 0 0 0 0 0 0
25 0 0 0.26 29.2 1.60 0.32 0.06 0 0 0 0 0 0.02
20 0 0 1.90 44.5 2.20 0.89 0.16 0 0 0 0 0 0.17
15 0 0 4.33 63.9 5.47 1.80 0.39 0.06 0 0 0 0 0.49
10 0 0 16.2 103 11.6 5.40 0.99 0.18 0.10 0.05 0 0 2.00
5 0 0 45.3 184 24.5 33.1 2.50 1.10 0.45 0.37 0 0 17.6
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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 ng 3.55 2.99 2.02 1.15
0.95 1.05 30.8 13.2 10.4 6.93 3.97
0.90 1.11 53.9 25.0 19.1 12.5 7.18
0.80 1.25 103 51.3 37.7 24.1 13.8
0.50 2 323 173 118 70.8 39.7
0.20 5 903 478 300 167 91.2
0.10 10 1,480 755 455 242 130
0.04 25 2,410 1,160 672 340 178
0.02 50 3,250 1,500 842 412 212
0.01 100 4,200 1,850 1,010 480 244
0.005 200 5,260 2,210 1,180 545 273
0.002 500 6,840 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 0
0.10 10 ng ng ng ng ng ng ng ng 0
0.20 5 ng ng ng ng ng ng ng ng 0
0.50 2 ng ng ng ng ng ng ng ng 0
____________________________________________________________________________________
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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 ng 0
0.10 10 ng ng ng ng ng ng ng 0
0.20 5 ng ng ng ng ng ng ng 0
0.50 2 ng ng ng ng ng ng ng 0
June-July-August September-October-November
_________________________ ___________________________
0.05 20 ng ng ng 0 ng ng ng ng
0.10 10 ng ng ng 0 ng ng ng ng
0.20 5 ng ng ng 0 ng ng ng ng
0.50 2 ng ng ng 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 July 8 4.37 393 1976 April 4 7.30 650
1963 June 2 4.70 572 1977 May 20 3.42 50.0
1964 April 10 3.03 132 1978 April 7 5.84 392
1965 July 22 5.00 360 1979 April 21 10.35 2,000
1966 March 17 6.18 670 1980 April 5 4.05 85.0
1967 April 21 4.57 310 1981 February 24 5.00 31.0
1968 August 25 3.08 98.0 1982 June 5 8.41 1,440
1969 April 12 7.90 1,130 1983 April 2 4.88 148
1970 June 11 8.55 1,740 1984 March 28 3.99 38.0
1971 April 10 8.56 1,920 1985 March 13 6.22 470
1972 March 19 4.98 245 1986 March 17 5.23 198
1973 March 12 3.40 40.0 1987 April 5 7.20 605
1974 April 17 7.62 1,260 1988 March 29 3.00 6.30
1975 April 13 5.75 389
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 21 10.35 2,000 1965 July 22 5.00 360
1971 April 10 8.56 1,920 1967 April 21 4.57 310
1970 June 11 8.55 1,740 1972 March 19 4.98 245
1982 June 5 8.41 1,440 1986 March 17 5.23 198
1974 April 17 7.62 1,260 1983 April 2 4.88 148
1969 April 12 7.90 1,130 1964 April 10 3.03 132
1966 March 17 6.18 670 1968 August 25 3.08 98.0
1976 April 4 7.30 650 1980 April 5 4.05 85.0
1987 April 5 7.20 605 1977 May 20 3.42 50.0
1963 June 2 4.70 572 1973 March 12 3.40 40.0
1985 March 13 6.22 470 1984 March 28 3.99 38.0
1962 July 8 4.37 393 1981 February 24 5.00 31.0
1978 April 7 5.84 392 1988 March 29 3.00 6.30
1975 April 13 5.75 389
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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
__________________________________________________________________________________________________________________________________
1961 -- -- -- -- -- -- -- -- 0 0 0 0 --
1962 0 0 0 0 0 0 42.9 1.10 1.50 15.1 0.119 0.003 5.03
1963 0 0 0 0 0 1.06 0.823 0.023 46.9 25.6 16.5 0.023 7.59
1964 0 0 0 0 0 0 23.8 0.294 1.59 0.081 0 0 2.11
1965 0 0 0 0 0 0 19.1 2.21 0.873 30.4 3.74 0.567 4.77
1966 0.270 0.002 0 0 0 30.1 12.2 8.49 0.025 0 0 0 4.30
1967 0 0 0 0 0 13.0 45.2 7.84 0 0 0 0 5.48
1968 0 0 0 0 0 3.63 0.475 0 0 0 7.95 11.9 1.99
1969 0.381 0.029 0 0 0 0 152.8 0.661 0.080 0.162 0 0 12.7
1970 0 0 0 0 0 0 84.5 11.9 122.1 0.572 0 0 18.0
1971 0 0 0 0 0 0 119.8 0.450 0 0.873 0.015 0 9.96
1972 0 0 0 0 0 41.3 16.2 0.393 0.002 0 0 0 4.86
1973 0 0 0 0 0 2.54 0.037 0 0 0 0 0 0.219
1974 0 0 0 0 0 0 170.6 42.6 0.888 0.005 0 0 17.7
1975 0 0 0 0 0 0 34.2 3.99 10.5 1.60 0 0 4.15
1976 0 0 0 0 0 0 87.9 0.199 0.005 0 0.022 0 7.23
1977 0 0 0 0 0 0 0.074 8.44 0.157 0 0 0 0.736
1978 0 0 0 0 0 0 45.8 4.74 0.340 0.346 0 0 4.23
1979 0 0 0 0 0 0 106.2 11.9 0.424 0.002 0 0 9.77
1980 0 0 0 0 0 0 8.52 0.018 0.193 0.127 0.042 0.007 0.730
1981 0.018 0.013 0 0 4.71 4.71 0.638 0.496 0.016 0 0 0 0.860
1982 0 0 0 0 0 4.97 42.1 0.691 54.1 0.105 0.048 0 8.39
1983 2.25 0.162 0.337 0 0 12.6 39.1 0.678 0.048 0.320 0 0 4.61
1984 0 0 0 0 0 3.95 1.13 0.780 0.021 0 0 0 0.495
1985 0 0 0 0 0 49.2 1.16 0.006 18.6 7.75 0.064 0 6.47
1986 0.029 0 0 0 0 27.8 12.6 2.83 15.7 2.06 0.013 0 5.10
1987 0 0 0 0 0 0 70.0 0.028 0 0 0.695 0.163 5.83
1988 0.010 0 0 0 0 1.61 1.15 0.002 0 0 0 0 0.232
1989 0 0 0 -- -- -- -- -- -- -- -- -- --
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