
----------------------------------------------------------------------------------------------------------
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 10.2 1965 0 m 1.15 2.59 2.25 0.33
November 6.92 1972 0 m 0.830 1.61 1.95 0.23
December 2.96 1970 0 m 0.380 0.78 2.04 0.11
January 1.77 1970 0 m 0.190 0.41 2.22 0.05
February 3.75 1954 0 m 0.230 0.67 2.93 0.06
March 408 1966 0 m 47.2 79.64 1.69 13.3
April 1,080 1950 0 1981 204 254 1.25 57.5
May 1,390 1950 0 1981 64.0 215 3.36 18.1
June 103 1964 0 m 22.4 26.0 1.16 6.32
July 52.5 1952 0 m 8.98 12.6 1.40 2.54
August 45.5 1966 0 m 3.07 9.10 2.97 0.87
September 29.9 1957 0 m 2.09 5.77 2.75 0.59
Annual 214 1950 0 1981 29.5 38.8 1.31 100
___________________________________________________________________________________________________________

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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 0.06 0.10 0 0 0 0 0 0 0 0
90 0 0 0 0.99 0.27 0 0 0 0 0 0 0 0
85 0 0 0 2.00 0.52 0 0 0 0 0 0 0 0
80 0 0 0 4.73 1.00 0.13 0 0 0 0 0 0 0
75 0 0 0 7.56 1.40 0.49 0.02 0 0 0 0 0 0
70 0 0 0 12.1 1.90 1.30 0.09 0 0 0 0 0 0
65 0 0 0 15.6 3.28 2.50 0.23 0 0 0 0 0 0
60 0 0 0 21.2 4.05 3.52 0.59 0 0 0 0 0 0
55 0 0 0 29.7 5.22 5.07 1.10 0 0 0 0 0 0
50 0 0 0.02 41.1 7.28 7.13 1.50 0 0 0 0 0 0.08
45 0 0 0.17 55.1 10.1 9.93 2.10 0.08 0 0 0 0 0.26
40 0 0 0.48 73.6 15.4 13.0 4.06 0.08 0 0 0.10 0.03 0.59
35 0 0 0.98 98.8 21.2 15.8 5.60 0.35 0 0 0.22 0.09 0.88
30 0.03 0 3.20 127 28.3 19.6 7.44 0.48 0.07 0.09 0.33 0.20 2.21
25 0.10 0 13.1 162 36.3 24.0 8.82 1.20 0.22 0.19 0.50 0.35 3.75
20 0.22 0.08 27.3 216 50.5 29.8 12.1 2.10 0.68 0.52 0.93 0.50 7.54
15 0.49 0.34 57.4 308 67.1 40.3 16.2 3.67 1.20 1.40 1.70 0.73 15.5
10 0.57 0.44 114 522 110 59.7 23.9 5.16 2.80 4.13 3.20 1.10 32.6
5 1.10 0.70 284 1,020 195 99.1 39.3 14.0 9.72 7.13 5.14 2.20 98.5
_____________________________________________________________________________________________________________________
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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 0 0 0 0
0.95 1.05 86.1 26.4 19.2 13.9 9.94
0.90 1.11 139 62.5 45.9 32.2 21.3
0.80 1.25 242 142 105 71.2 44.8
0.50 2 667 512 383 246 149
0.20 5 1,710 1,500 1,120 689 424
0.10 10 2,720 2,460 1,840 1,110 705
0.04 25 4,360 4,010 2,990 1,770 1,170
0.02 50 5,860 5,390 4,000 2,340 1,610
0.01 100 7,580 6,940 5,140 2,970 2,130
0.005 200 9,530 8,630 6,380 3,660 2,710
0.002 500 12,500 ng ng ng ng
__________________________________________________________________________________________________
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Probability of occurrence of annual low discharges
____________________________________________________________________________________
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 0 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0 0
0.50 2 0 0 0 0 0 0 0 0 0.032
____________________________________________________________________________________
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Probability of occurrence of seasonal low discharges
_____________________________________________________________________________________
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 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0.025
0.50 2 0 0 0 0 0 0 0 1.48
June-July-August September-October-November
___________________________ ___________________________
0.05 20 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0
0.50 2 0 0 0 0.090 0 0 0 0
_____________________________________________________________________________________
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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
1940 April 16 7.88 487 1963 April 8 5.83 150
1941 April 9 12.59 1,130 1964 June 22 7.96 381
1942 April 5 11.51 850 1965 April 13 18.22 3,740
1943 March 26 14.90 1,200 1966 March 21 14.19 1,190
1944 April 10 5.10 169 1967 April 23 16.05 2,080
1945 March 15 6.70 340 1968 June 10 8.22 448
1946 March 20 9.14 530 1969 April 13 18.17 3,660
1947 March 28 6.95 260 1970 April 27 14.62 1,670
1948 April 21 21.30 4,700 1971 April 9 12.63 1,150
1949 April 7 13.60 1,200 1972 April 17 15.27 1,720
1950 May 9 20.12 8,530 1973 March 17 7.71 247
1951 March 30 12.50 650 1974 April 14 16.40 2,200
1952 April 3 11.45 600 1975 April 19 14.92 1,340
1953 July 4 7.77 367 1976 April 1 10.15 680
1954 June 15 4.28 58 1981 -- -- 0
1955 March 31 10.80 600 1982 April 1 12.32 810
1956 April 16 11.07 550 1983 March 16 9.97 450
1957 September 5 5.95 134 1984 March 27 13.09 1,170
1958 July 27 5.47 95.0 1985 March 17 7.95 270
1959 April 3 4.94 72.0 1986 March 25 10.71 818
1960 April 8 11.45 924 1987 April 8 17.58 2,500
1961 March 10 4.13 71.0 1988 March 29 11.20 500
1962 April 8 15.39 1,610
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 May 9 20.12 8,530 1982 April 1 12.32 810
1948 April 21 21.30 4,700 1976 April 1 10.15 680
1965 April 13 18.22 3,740 1951 March 30 12.50 650
1969 April 13 18.17 3,660 1952 April 3 11.45 600
1987 April 8 17.58 2,500 1955 March 31 10.80 600
1974 April 14 16.40 2,200 1956 April 16 11.07 550
1967 April 23 16.05 2,080 1946 March 20 9.14 530
1972 April 17 15.27 1,720 1988 March 29 11.20 500
1970 April 27 14.62 1,670 1940 April 16 7.88 487
1962 April 8 15.93 1,610 1983 March 16 9.97 450
1975 April 19 14.92 1,340 1968 June 10 8.22 448
1943 March 26 14.90 1,200 1964 June 22 7.96 381
1949 April 7 13.60 1,200 1953 July 4 7.77 367
1966 March 21 14.19 1,190 1945 March 15 6.70 340
1984 March 27 13.09 1,170 1985 March 17 7.95 270
1971 April 9 12.63 1,150 1947 March 28 6.95 260
1941 April 9 12.59 1,130 1973 March 17 7.71 247
1960 April 8 11.45 924 1944 April 10 5.10 169
1942 April 5 11.51 850 1963 April 8 5.83 150
1986 March 25 10.71 818 1957 September 5 5.95 134
1958 July 27 5.47 95.0 1954 June 15 4.28 58
1959 April 3 4.94 72.0 1981 -- -- 0
1961 March 10 4.13 71.0
_____________________________________________________________________________________
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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
__________________________________________________________________________________________________________________________________
1940 0 0 0 0 0 0 49.3 0.635 0.007 0 0 0 4.10
1941 0 0 0 0 0 0.355 254.8 4.41 13.4 1.57 0 0 22.6
1942 0 0.277 0 0 0 3.51 150.2 28.0 4.78 0.268 0.013 0 15.5
1943 0 0 0 0 0 152.3 57.2 9.98 30.7 2.58 0.023 0 21.2
1944 0 0 0 0 0 0 38.0 1.55 3.17 0.919 3.75 1.30 4.01
1945 0.226 1.58 0.429 0 0 62.2 11.9 5.90 5.80 0.142 0.023 0 7.44
1946 0 0 0 0 0 113.2 18.2 2.80 0.877 0.681 0 0 11.5
1947 0 0 0 0 0 52.2 65.0 3.00 14.7 0.681 0.019 0 11.3
1948 0 0 0 0 0 0 819.5 66.2 7.27 6.23 3.03 0 74.2
1949 0 0.100 0.129 0.100 0 0.165 257.0 11.0 57.7 4.85 0.874 0 27.3
1950 0.061 0.133 0.119 0 0 12.2 1,081 1,390 58.0 17.8 1.32 0.543 214.4
1951 0.139 0.613 0.781 0.571 0.400 54.4 94.0 6.09 1.90 0.135 0 0 13.2
1952 0 0 0 0 0 2.45 121.8 1.03 0 52.5 0.516 0 14.8
1953 0 0 0 0 0 10.1 2.58 4.86 55.8 43.1 0.081 0.947 9.81
1954 0 0 0 0 3.75 12.0 14.8 4.55 4.63 0.239 0 0 3.31
1955 0 0 0 0 0 3.29 92.4 1.38 30.7 0.855 0.019 0 10.6
1956 0 0 0 0 0 0 116.9 26.7 22.2 1.18 0 0 13.8
1957 0 0 0 0 0 6.71 2.72 0.148 2.21 3.74 0.006 29.9 3.76
1958 6.06 4.86 1.32 0 0 0.052 3.30 0.190 0.227 5.07 0.342 0 1.80
1959 0 0 0 0 0 9.20 12.4 0.758 1.72 0 0 0 2.01
1960 0 0 0 0 0 35.2 170.5 3.87 0.963 0.019 0 0 17.4
1961 0 0 0 0 0 12.9 3.37 0.703 0 0 0 0 1.43
1962 0 0 0 0 0 0 280.3 41.4 72.8 9.03 2.08 1.03 33.6
1963 0.142 0.510 0.252 0.013 0 12.6 35.1 2.47 0.527 0.703 0.016 0 4.34
1964 0 0 0 0 0 0 46.6 5.18 103.2 11.1 0.197 9.97 14.5
1965 10.2 1.31 0.335 0.148 0.068 0.097 635.0 43.1 21.0 13.0 5.45 6.96 60.7
1966 8.50 4.11 2.54 1.49 0.754 407.7 198.9 67.9 31.0 43.8 45.5 5.16 68.8
1967 0.984 1.22 0.530 0.844 0.705 68.3 449.9 183.3 24.7 9.25 0.659 0.009 61.6
1968 0.052 0.368 0.026 0.021 0 53.5 19.8 7.35 55.0 15.3 4.05 2.70 13.2
1969 0.169 0.789 0.574 0.319 0.550 0.903 710.7 36.0 20.3 15.5 3.69 20.2 66.7
1970 7.42 4.29 2.96 1.77 1.57 2.32 539.2 108.9 73.5 10.6 2.77 4.40 62.8
1971 0.727 2.25 0.839 0.457 0.355 23.1 258.7 24.0 17.8 18.0 2.49 0.612 28.9
1972 2.34 6.92 2.88 0.779 0.448 175.5 379.2 52.9 20.6 1.55 1.06 0.137 53.5
1973 0.006 0.029 0.075 0.018 0 64.3 9.28 2.51 7.96 0.885 0 0 7.17
1974 3.71 0.298 0.180 0.051 0.011 0.014 600.4 177.2 63.6 15.3 6.71 1.22 72.0
1975 2.98 1.75 0.526 0.457 0.024 2.74 360.4 152.0 58.3 15.6 0.190 0.015 49.4
1981 0 0 0 0 0 0 0 0 0 0 0 0 0
1982 0 0 0 0 0 33.3 177.7 19.7 5.27 1.89 0.106 0 19.7
1983 -- -- -- -- -- 147.2 113.0 34.5 21.4 20.6 39.4 -- --
1984 -- -- -- -- -- 186.7 149.2 35.9 17.6 7.96 0.749 0 --
1985 -- -- -- -- -- 78.9 19.2 1.99 0.022 0 0 0 --
1986 -- -- -- -- -- 180.6 130.3 115.7 8.41 24.5 3.71 0.717 --
__________________________________________________________________________________________________________________________________
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