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Last update: Tuesday, 31-Aug-2004 10:28:52 EDT
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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 1.07 1966 0 m 0.060 0.25 4.19 0.18
November 0.054 1966 0 m 0 0.01 3.76 0.01
December 0 m 0 m 0 0 ng 0
January 0 m 0 m 0 0 ng 0
February 0.006 1981 0 m 0 0 4.24 0
March 41.8 1987 0 m 9.12 10.6 1.17 26.7
April 56.5 1969 0.007 1991 13.8 16.8 1.22 40.3
May 11.9 1972 0 m 2.13 2.84 1.33 6.23
June 34.5 1968 0 m 2.85 6.77 2.38 8.34
July 65.3 1993 0 m 5.06 12.9 2.55 14.8
August 7.95 1993 0 m 0.580 1.90 3.30 1.69
September 15.3 1994 0 m 0.590 2.80 4.74 1.73
Annual 5.55 1969 0.002 1981 2.82 1.84 0.65 100
__________________________________________________________________________________________________________
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Monthly and annual flow duration, in cubic feet per second
[ng, statistic not given]
______________________________________________________________________________________________________________________
Percentage
of days
discharge Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Annual
equaled or
exceeded
______________________________________________________________________________________________________________________
95 ng ng ng ng ng ng ng ng ng ng ng ng 0
90 ng ng ng ng ng ng ng ng ng ng ng ng 0
85 ng ng ng ng ng ng ng ng ng ng ng ng 0
80 ng ng ng ng ng ng ng ng ng ng ng ng 0
75 ng ng ng ng ng ng ng ng ng ng ng ng 0
70 ng ng ng ng ng ng ng ng ng ng ng ng 0
65 ng ng ng ng ng ng ng ng ng ng ng ng 0
60 ng ng ng ng ng ng ng ng ng ng ng ng 0
55 ng ng ng ng ng ng ng ng ng ng ng ng 0
50 ng ng ng ng ng ng ng ng ng ng ng ng 0
45 ng ng ng ng ng ng ng ng ng ng ng ng 0
40 ng ng ng ng ng ng ng ng ng ng ng ng 0
35 ng ng ng ng ng ng ng ng ng ng ng ng 0
30 ng ng ng ng ng ng ng ng ng ng ng ng 0
25 ng ng ng ng ng ng ng ng ng ng ng ng 0.02
20 ng ng ng ng ng ng ng ng ng ng ng ng 0.19
15 ng ng ng ng ng ng ng ng ng ng ng ng 0.72
10 ng ng ng ng ng ng ng ng ng ng ng ng 1.90
5 ng ng ng ng ng ng ng ng ng ng ng ng 8.82
______________________________________________________________________________________________________________________
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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 0.005 0.003 0.002 0.001
0.95 1.05 ng 0.377 0.238 0.140 0.084
0.90 1.11 25.5 2.29 1.44 0.838 0.498
0.80 1.25 53.0 13.4 8.28 4.81 2.83
0.50 2 177 122 73.6 42.5 24.6
0.20 5 465 327 194 111 64.0
0.10 10 705 400 236 135 77.5
0.04 25 1,030 439 257 148 84.3
0.02 50 1,280 449 263 151 86.1
0.01 100 1,530 453 265 152 86.8
0.005 200 1,760 455 266 152 87.1
0.002 500 2,060 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 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 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 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 0.123
June-July-August September-October-November
_________________________ ___________________________
0.05 20 ng 0 0 0 ng ng ng ng
0.10 10 ng 0 0 0 ng ng ng ng
0.20 5 ng 0 0 0 ng ng ng ng
0.50 2 ng 0 0 0 ng ng ng ng
_____________________________________________________________________________________
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Annual peak discharge and corresponding gage height, period of record
_____________________________________________________________________________________
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
1965 April 10 4.43 575 1980 March 29 3.18 33.0
1966 March 14 3.18 150 1981 June 21 1.88 0.980
1967 April 20 3.88 248 1982 April 1 5.56 850
1968 June 10 4.78 734 1983 March 13 4.29 160
1969 April 9 4.50 540 1984 March 24 4.81 300
1970 April 25 4.03 349 1985 March 12 3.29 73.0
1971 April 2 4.52 145 1986 March 17 3.69 100
1972 May 27 4.65 465 1987 March 21 6.47 360
1973 March 14 2.92 59.0 1988 March 24 3.78 75.0
1974 April 10 3.80 232 1989 April 5 4.11 217
1975 April 18 3.48 122 1990 June 13 3.08 4.10
1976 March 24 3.38 104 1991 May 24 3.33 19.0
1977 July 5 1.70 0.910 1992 March 4 4.11 100
1978 March 26 4.19 175 1993 July 24 7.53 585
1979 April 18 5.86 900 1994 July 8 5.30 234
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 18 5.86 900 1983 March 13 4.29 160
1982 April 1 5.56 850 1966 March 14 3.18 150
1968 June 10 4.78 734 1971 April 2 4.52 145
1993 July 24 7.53 585 1975 April 18 3.48 122
1965 April 10 4.43 575 1976 March 24 3.38 104
1969 April 9 4.50 540 1986 March 17 3.69 100
1972 May 27 4.65 465 1992 March 4 4.11 100
1987 March 21 6.47 360 1988 March 24 3.78 75.0
1970 April 25 4.03 349 1985 March 12 3.29 73.0
1984 March 24 4.81 300 1973 March 14 2.92 59.0
1967 April 20 3.88 248 1980 March 29 3.18 33.0
1994 July 8 5.30 234 1991 May 24 3.33 19.0
1974 April 10 3.80 232 1990 June 13 3.08 4.10
1989 April 5 4.11 217 1981 June 21 1.88 0.980
1978 March 26 4.19 175 1977 July 5 1.70 0.910
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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
__________________________________________________________________________________________________________________________________
1965 0 0 0 0 0 2.46 41.9 0.601 1.11 9.13 0.063 0.714 4.64
1966 1.07 0.054 0 0 0 33.5 6.29 3.05 1.72 10.6 1.84 0.001 4.91
1967 0 0 0 0 0 16.2 17.7 7.20 1.75 0.002 0 0 3.58
1968 0 0 0 0 0 6.45 0.067 0.279 34.5 6.16 0.124 0.027 3.94
1969 0 0 0 0 0 0 56.5 3.08 6.37 1.45 0 0 5.55
1970 0 0 0 0 0 0.359 43.1 8.49 4.75 0.099 0 0 4.69
1971 0 0 0 0 0 3.28 11.2 0.969 15.2 2.75 0 0 2.76
1972 0 0 0 0 0 11.7 13.8 11.9 1.10 0.009 0.002 0.001 3.22
1973 0 0 0 0 0 4.86 0.021 0 0 0 0.013 0.001 0.415
1974 0.003 0 0 0 0 0 24.1 3.95 0.795 0 0 0 2.38
1975 0 0 0 0 0 0.019 17.2 3.81 2.73 1.70 0 0 2.11
1976 0 0 0 0 0 7.86 1.31 0.047 0 0 0 0 0.777
1977 0 0 0 0 0 0.034 0.013 0.007 0.003 0.013 0 0.006 0.006
1978 0.010 0.007 0 0 0 20.8 14.8 1.26 0.020 0 0 0 3.10
1979 0 0 0 0 0 0 55.2 2.81 0.105 0 0 0 4.78
1980 0 0 0 0 0 2.59 2.11 0 0 0 0.008 0 0.393
1981 0 0 0 0 0.006 0.005 0.008 0 0.001 0 0 0 0.002
1982 0 0 0 0 0 10.3 26.9 0.144 0.004 5.24 0 0 3.54
1983 -- -- -- -- -- 20.2 9.55 1.13 7.15 0.754 0 0 --
1984 -- -- -- -- -- 25.7 8.00 0.826 0 0 0 0 --
1985 -- -- -- -- -- 9.38 0.044 0 0 0 0 0 --
1986 -- -- -- -- -- 8.46 3.97 3.01 0.004 1.95 0.253 0.001 --
1987 -- -- -- -- -- 41.8 22.6 3.95 0.225 14.5 0.099 0.020 --
1988 -- -- -- -- -- 6.85 0.562 0.070 0 0 0 0 --
1989 -- -- -- -- -- 0.887 29.3 0.573 0.133 0 0.001 0.023 --
1990 -- -- -- -- -- 0.022 0.023 0 1.22 0.035 0 0 --
1991 -- -- -- -- -- 0.015 0.007 3.54 0.383 0.020 0 0 --
1992 -- -- -- -- -- 11.1 0.304 0.062 0.010 3.03 0.019 0.011 --
1993 -- -- -- -- -- 16.8 4.08 1.87 2.46 65.3 7.95 1.61 --
1994 -- -- -- -- -- 11.9 2.85 1.23 3.73 29.1 6.93 15.3 --
__________________________________________________________________________________________________________________________________
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