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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 30.3 1995 0 m 1.99 5.48 2.75 1.56
November 25.4 1995 0 m 1.28 4.44 3.48 1.00
December 4.33 1995 0 m 0.29 0.85 2.95 0.23
January 1.06 1995 0 m 0.07 0.23 3.44 0.05
February 2.61 1984 0 m 0.25 0.54 2.16 0.19
March 151 1995 0 m 26.5 30.6 1.15 20.7
April 252 1996 0.192 1981 62.0 71.0 1.15 48.5
May 81.2 1995 0.042 1977 13.8 19.8 1.44 10.8
June 29.4 1994 0.001 m 5.70 7.09 1.24 4.46
July 104 1993 0 m 9.57 21.0 2.20 7.49
August 43.4 1994 0 m 4.03 9.53 2.36 3.16
September 21.2 1993 0 m 2.31 5.25 2.28 1.81
Annual 36.2 1995 0.121 1977 10.6 9.02 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 0.09 0.02 0 0 0 0 0 0 0 0
90 0 0 0 0.36 0.14 0 0 0 0 0 0 0 0
85 0 0 0 0.52 0.34 0.03 0 0 0 0 0 0 0
80 0 0 0 1.10 0.46 0.14 0 0 0 0 0 0 0
75 0 0 0 1.50 0.61 0.25 0 0 0 0 0 0 0
70 0 0 0 2.20 1.10 0.34 0 0 0 0 0 0 0
65 0 0 0 4.99 1.50 0.45 0.07 0 0 0 0 0 0
60 0 0 0 7.61 2.00 0.60 0.18 0 0 0 0 0 0
55 0 0 0.13 10.8 2.00 1.10 0.34 0 0 0 0.07 0 0.04
50 0 0 0.34 15.3 2.70 1.10 0.47 0 0.02 0.08 0.12 0 0.12
45 0 0 0.88 20.6 3.90 1.50 0.90 0.03 0.08 0.19 0.20 0 0.25
40 0 0 2.30 27.9 4.54 1.90 1.20 0.10 0.19 0.24 0.25 0 0.36
35 0 0 5.22 36.5 5.58 2.60 2.46 0.19 0.24 0.32 0.25 0 0.75
30 0 0 9.89 46.8 7.92 3.71 3.27 0.33 0.41 0.71 0.42 0.05 1.50
25 0 0 18.3 59.5 13.1 4.43 4.21 0.60 0.71 1.20 0.54 0.10 2.20
20 0 0 37.5 80.0 22.5 7.14 6.31 1.40 1.20 1.60 0.69 0.18 4.55
15 0 0.17 62.6 111 33.3 11.4 9.59 3.93 2.70 2.70 1.10 0.34 8.21
10 0.09 0.50 93.2 169 46.1 17.1 16.4 11.3 6.20 4.30 1.50 0.52 20.7
5 0.59 0.85 156 291 65.7 25.8 40.3 22.8 14.0 6.89 4.35 1.80 53.1
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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 4.2 1.44 0.853 0.587 0.404
0.95 1.05 18.3 8.75 5.85 4.11 2.77
0.90 1.11 37.3 20.1 14.1 9.92 6.63
0.80 1.25 82.4 48.9 35.6 25.1 16.6
0.50 2 306 191 143 99.8 65.3
0.20 5 881 501 367 249 162
0.10 10 1,400 722 515 344 223
0.04 25 2,140 973 671 440 286
0.02 50 2,720 1,130 761 493 321
0.01 100 3,310 1,260 831 533 347
0.005 200 3,890 1,370 885 563 367
0.002 500 4,640 ng ng ng ng
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Annual peak discharge and corresponding gage height, period of record
[--, no data]
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Gage Peak Gage Peak
Water Date height discharge Water Date height discharge
year (feet) (ft3/s) year (feet) (ft3/s)
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Annual peak discharge, by year, and corresponding gage height
1965 April 11 6.88 1,250 1982 March 30 5.74 700
1966 March 20 7.33 400 1983 June 21 4.53 259
1967 April 20 5.52 652 1984 March 25 -- 150
1968 June 7 3.55 47.0 1985 March 11 4.49 253
1969 April 9 6.55 1,320 1986 May 12 4.60 282
1970 June 16 6.49 1,270 1987 July 22 6.04 688
1971 April 5 4.77 392 1988 March 24 4.07 130
1972 May 26 5.65 736 1989 April 5 4.55 230
1973 March 14 4.35 170 1990 June 30 2.67 9.70
1974 April 11 -- 550 1991 May 23 2.65 7.80
1975 June 22 5.07 472 1992 March 5 -- 95.0
1976 March 24 5.26 290 1993 July 23 6.42 700
1977 March 31 3.00 29.0 1994 April 24 -- 170
1978 March 28 7.28 950 1995 March 14 5.80 325
1979 April 19 8.35 1,900 1996 April 11 10.79 1,200
1980 March 31 3.72 100 1997 April 5 -- 450
1981 July 17 2.89 10.0
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 19 8.35 1,900 1976 March 24 5.26 290
1969 April 9 6.55 1,320 1986 May 12 4.60 282
1970 June 16 6.49 1,270 1983 June 21 4.53 259
1965 April 11 6.88 1,250 1985 March 11 4.49 253
1996 April 11 10.79 1,200 1989 April 5 4.55 230
1978 March 28 7.28 950 1973 March 14 4.35 170
1972 May 26 5.65 736 1994 March 24 -- 170
1982 March 30 5.74 700 1984 March 25 -- 150
1993 July 23 6.42 700 1988 March 24 4.07 130
1987 July 22 6.04 688 1980 March 31 3.72 100
1967 April 20 5.52 652 1992 March 5 -- 95.0
1974 April 11 -- 550 1968 June 7 3.55 47.0
1975 June 22 5.07 472 1977 March 31 3.00 29.0
1997 April 5 -- 450 1981 July 17 2.89 10.0
1966 March 20 7.33 400 1990 June 30 2.67 9.70
1971 April 5 4.77 392 1991 May 23 2.65 7.80
1995 March 14 5.80 325
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Monthly and annual mean discharges, in cubic feet per second Continued
[Data werenot rounded in accordance with U.S. Geological Survey publication standards]
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Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
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1965 1.15 0.140 0 0 0 0 108.6 6.01 6.21 2.24 0.381 1.86 10.4
1966 1.33 0.119 0.061 0 0 64.6 14.4 9.07 3.63 11.8 5.09 0.269 9.32
1967 0.139 0.019 0 0 0 62.7 65.8 30.5 3.38 0.434 0.025 0 13.7
1968 0 0 0 0 0 10.7 2.86 0.891 8.24 3.45 0.440 1.31 2.33
1969 0.089 0.124 0.046 0 0 0 145.8 3.54 3.76 1.76 0 7.87 13.4
1970 1.28 0.454 0.270 0 0 0.387 126.1 13.2 15.8 0.120 0.005 0.687 13.1
1971 0.018 0.391 0.008 0 0 35.5 68.1 2.30 4.13 5.97 0.115 0.721 9.76
1972 4.30 1.45 0.090 0 0 43.5 68.1 24.6 1.73 0 0.001 0 12.0
1973 0 0 0 0 0.111 13.6 1.43 0.754 3.68 0.172 0 0 1.67
1974 4.48 0.687 0.088 0 0 0 131.5 39.4 16.5 5.18 3.22 0.127 16.7
1975 0.010 0.473 0.007 0 0 3.90 57.5 17.1 11.1 1.87 0 0 7.62
1976 0 0 0 0 0.172 37.3 13.6 1.21 0.056 0.053 0 0 4.40
1977 0 0 0 0 0 0.812 0.537 0.042 0.003 0.037 0 0.014 0.121
1978 0.185 0.209 0.315 0 0 44.0 86.0 3.28 0.309 0 0 0.691 11.2
1979 0.008 0 0 0 0 0 244.1 47.0 2.49 0.681 0.276 0.002 24.3
1980 0 0 0 0 0 7.56 8.66 0.307 0.001 0 0 0 1.38
1981 0 0 0 0 1.05 0.812 0.192 0.118 0.293 1.02 0.224 0.057 0.310
1982 1.08 0.458 0.005 0 0 28.4 28.8 2.49 1.09 0.053 0.118 0.001 5.23
1983 9.30 1.41 0.214 0.031 0.573 55.5 26.0 2.93 8.31 6.41 18.3 10.6 11.7
1984 3.76 1.87 0.361 0 2.61 34.6 33.9 4.52 1.39 0.013 0 0 6.91
1985 0 0 0 0 0.714 34.1 3.55 4.46 1.47 0.064 0.329 2.07 3.94
1986 1.26 0.614 0.149 0.011 0 47.4 25.8 16.3 0.285 8.95 0.320 1.88 8.67
1987 0.297 1.79 0.151 0 0 36.2 137.1 15.8 19.8 54.3 18.2 2.74 23.9
1988 0.321 0.264 0.017 0 0.083 32.0 19.9 0.371 0.001 5.78 0.458 0 4.95
1989 0 0 0 0 0 1.27 65.8 3.92 0.466 0 0 0 5.89
1990 0 0 0 0 0 0.247 0.863 0.137 1.65 0.402 0 0 0.273
1991 0 0 0 0 0 0.039 0.521 1.88 0.368 1.97 0.155 0 0.417
1992 0 0.060 0 0 1.24 29.3 1.52 1.92 2.06 2.65 0.066 0.190 3.29
1993 0 0.024 0 0 0 24.0 4.12 0.874 2.43 103.6 27.7 21.2 15.6
1994 5.09 5.04 2.52 0.796 0.723 47.6 22.1 13.5 29.4 41.0 43.4 20.1 19.4
1995 30.3 25.4 4.33 1.06 0.510 151.1 79.4 81.2 14.8 31.9 7.06 3.00 36.2
1996 1.05 0.807 0.743 0.219 0.352 0.375 251.6 47.8 14.7 3.63 0.841 0.323 26.6
1997 0.336 0.314 0.169 0.073 0.044 26.1 200.7 56.8 8.52 20.3 6.30 0.478 26.6
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