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Last update: Tuesday, 24-Aug-2004 12:38:26 EDT
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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 59.2 1996 0.023 1977 15.0 14.9 0.99 2.15
November 76.7 1972 2.05 1977 14.9 13.3 0.89 2.13
December 23.5 1978 0.006 1961 5.03 4.83 0.96 0.72
January 13.1 1978 0 m 1.72 2.56 1.49 0.25
February 14.0 1987 0 m 1.65 2.58 1.57 0.24
March 581 1966 0 m 105 138 1.32 15.0
April 1,680 1997 27.9 1973 281 302 1.07 40.2
May 580 1962 8.28 1980 82.4 103 1.25 11.8
June 1,070 1962 1.30 1976 90.4 179 1.98 12.9
July 1,110 1975 0 1988 76.6 177 2.31 11.0
August 152 1993 0 1976 11.8 24.6 2.08 1.69
September 174 1986 0 1976 13.6 28.5 2.10 1.94
Annual 198 1962 12.2 1977 58.7 44.5 0.76 100
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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 23.4 6.31 1.40 0.14 0 0 0.57 2.10 0 0
90 0 0 0 30.6 12.2 2.85 1.50 0 0.17 1.30 3.10 0 0
85 0 0 0 36.9 16.1 4.25 2.34 0.37 0.58 2.40 3.80 0.45 0.41
80 0 0 0 43.8 19.3 6.17 2.86 0.71 0.78 2.40 5.13 0.69 0.93
75 0 0 0.18 51.5 22.6 7.84 3.43 0.98 1.40 3.73 5.99 1.10 1.40
70 0 0 0.52 59.5 26.0 9.15 4.07 1.40 2.00 4.52 6.99 1.40 2.56
65 0.10 0 1.10 68.0 29.8 11.6 5.65 1.90 2.00 5.15 7.46 2.10 3.33
60 0.22 0 2.49 76.9 34.2 13.8 6.72 2.67 2.70 6.06 8.45 2.10 3.92
55 0.38 0.08 3.52 88.4 38.7 16.3 8.34 3.19 2.70 6.53 9.00 2.60 5.47
50 0.55 0.17 4.99 99.9 43.0 19.1 11.3 3.69 4.01 8.21 10.7 3.30 6.60
45 0.80 0.55 7.56 117 47.2 23.2 14.4 4.12 4.54 9.14 12.1 3.30 8.77
40 1.10 0.88 15.5 135 51.5 27.9 18.5 4.55 5.39 11.0 13.2 4.52 12.0
35 1.40 1.10 29.8 164 58.7 34.4 23.9 6.03 6.78 12.9 14.4 5.20 15.9
30 1.70 1.80 47.8 201 66.3 42.4 31.4 7.22 8.00 16.5 16.2 5.73 21.7
25 2.00 2.30 73.6 254 76.9 53.8 42.9 8.55 10.0 20.2 18.7 6.59 30.2
20 2.90 2.90 104 349 92.8 73.6 60.8 11.9 12.9 24.2 21.6 7.27 42.5
15 4.20 4.10 159 496 116 103 87.6 16.9 17.8 30.3 27.3 8.58 62.1
10 5.17 5.04 259 690 151 169 134 24.0 26.3 38.1 32.6 12.2 102
5 5.96 6.20 504 1,100 236 377 310 44.4 58.0 54.3 44.3 17.1 226
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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 85.2 66.7 56.0 39.3 31.1
0.95 1.05 192 150 122 85.2 63.8
0.90 1.11 292 229 183 127 92.5
0.80 1.25 477 377 296 203 143
0.50 2 1,170 944 715 480 318
0.20 5 2,700 2,270 1,650 1,080 675
0.10 10 4,080 3,520 2,510 1,610 983
0.04 25 6,240 5,560 3,890 2,450 1,450
0.02 50 8,150 7,420 5,120 3,180 1,840
0.01 100 10,300 9,570 6,520 4,000 2,280
0.005 200 12,700 12,000 8,110 4,920 2,760
0.002 500 16,200 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
1945 March 18 14.69 1,480 1972 March 17 14.39 2,140
1946 March 18 14.34 955 1973 March 16 7.33 132
1947 April 12 13.82 1,230 1974 April 13 12.76 1,330
1948 April 4 -- 730 1975 July 2 19.90 8,500
1949 April 5 9.08 324 1976 March 26 11.10 369
1950 April 1 -- 1,460 1977 June 3 9.05 234
1951 April 6 13.39 1,640 1978 March 31 15.70 3,440
1952 April 8 15.37 3,400 1979 April 14 15.33 2,800
1953 May 31 15.38 3,410 1980 April 2 12.99 1,260
1954 March 24 10.90 390 1981 May 23 11.33 500
1955 April 2 12.28 862 1982 April 1 13.12 1,350
1956 April 5 15.18 2,410 1983 July 5 14.03 1,500
1957 April 21 12.53 982 1984 March 26 13.94 2,090
1958 July 7 14.60 1,520 1985 June 2 13.69 1,660
1959 June 20 11.18 572 1986 March 25 14.86 2,550
1960 April 27 12.34 1,020 1987 March 26 11.34 689
1961 May 18 9.09 248 1988 March 9 10.64 175
1962 June 9 17.04 6,340 1989 April 4 16.30 3,800
1963 June 4 13.20 1,420 1990 April 1 9.22 178
1964 April 17 11.72 796 1991 May 4 10.30 285
1965 April 11 15.96 4,130 1992 June 20 10.94 414
1966 March 15 16.78 3,310 1993 March 30 14.57 1,910
1967 March 27 12.95 1,240 1994 March 24 12.79 730
1968 April 10 8.25 230 1995 March 15 14.41 1,770
1969 April 10 18.12 6,410 1996 May 20 14.46 2,000
1970 April 9 10.70 432 1997 April 5 18.92 5,850
1971 September 6 9.32 326
Annual peak discharge, from highest to lowest, and corresponding gage height
1975 July 2 19.90 8,500 1993 March 30 14.57 1,910
1969 April 10 18.12 6,410 1995 March 15 14.41 1,770
1962 June 9 17.04 6,340 1985 June 2 13.69 1,660
1997 April 5 18.92 5,850 1951 April 6 13.39 1,640
1965 April 11 15.96 4,130 1958 July 7 14.60 1,520
1989 April 4 16.30 3,800 1983 July 5 14.03 1,500
1978 March 31 15.70 3,440 1945 March 18 14.69 1,480
1953 May 31 15.38 3,410 1950 April 1 -- 1,460
1952 April 8 15.37 3,400 1963 June 4 13.20 1,420
1966 March 15 16.78 3,310 1982 April 1 13.12 1,350
1979 April 14 15.33 2,800 1974 April 13 12.76 1,330
1986 March 25 14.86 2,550 1980 April 2 12.99 1,260
1956 April 5 15.18 2,410 1967 March 27 12.95 1,240
1972 March 17 14.39 2,140 1947 April 12 13.82 1,230
1984 March 26 13.94 2,090 1960 April 27 12.34 1,020
1996 May 20 14.46 2,000 1957 April 21 12.53 982
1946 March 18 14.34 955 1976 March 26 11.10 369
1955 April 2 12.28 862 1971 September 6 9.32 326
1964 April 17 11.72 796 1949 April 5 9.08 324
1948 April 4 -- 730 1991 May 4 10.30 285
1994 March 24 12.79 730 1961 May 18 9.09 248
1987 March 26 11.34 689 1977 June 3 9.05 234
1959 June 20 11.18 572 1968 April 10 8.25 230
1981 May 23 11.33 500 1990 April 1 9.22 178
1970 April 9 10.70 432 1988 March 9 10.64 175
1992 June 20 10.94 414 1973 March 16 7.33 132
1954 March 24 10.90 390
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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
__________________________________________________________________________________________________________________________________
1945 -- -- -- -- -- -- 190.2 50.1 41.0 3.77 3.08 4.92 --
1946 7.84 5.29 0.265 0 0 201.9 51.1 18.9 15.8 37.6 3.88 2.72 29.1
1947 8.91 9.87 2.62 0.729 2.39 105.1 393.4 50.8 63.6 8.29 0.529 2.19 53.8
1948 6.13 2.93 0.016 0 0 56.6 263.8 22.2 8.89 4.38 1.88 0.490 30.4
1949 0.923 5.31 1.59 0 0 0.271 90.2 23.0 5.64 15.9 8.57 0.223 12.6
1950 3.32 4.53 1.99 0 0 188.4 618.5 286.2 17.5 4.81 1.71 0.927 94.0
1951 3.84 2.89 0.613 0 0 9 383.1 32.3 60.2 15.7 3.61 8.31 42.1
1952 20.5 10.9 6.66 1.79 1.00 1.51 595.3 14.3 3.38 179.8 11.1 8.15 70.7
1953 3.97 7.82 2.02 0.558 0 86.9 90.6 241.1 544.2 21.4 17.6 4.16 84.9
1954 1.24 3.90 1.75 0.568 0.889 86.6 91.1 50.7 54.5 10.0 4.42 6.01 26.0
1955 19.4 10.5 3.40 0.626 0 4.84 164.3 25.2 42.4 213.0 9.86 1.49 41.4
1956 2.67 2.64 0.135 0 0 0.177 411.5 54.3 21.1 3.12 2.84 1.56 41.2
1957 4.10 5.49 1.73 0.235 0 75.1 157.8 49.4 48.4 35.6 11.8 91.5 40.0
1958 34.1 40.1 6.93 2.21 3.65 19.6 41.7 27.4 45.6 419.4 12.0 15.4 56.3
1959 10.8 28.4 2.09 0 0 54.6 44.7 55.5 179.5 90.6 14.5 9.01 40.9
1960 13.7 7.53 4.18 3.24 2.86 27.4 386.6 68.5 38.6 39.0 7.75 8.73 50.3
1961 4.58 5.58 0.006 0 1.07 74.9 65.2 78.2 5.55 1.97 2.10 5.22 20.5
1962 8.95 6.33 2.89 0.100 0 0 353.7 580.1 1,068 256.9 78.8 19.4 197.8
1963 20.8 31.2 9.11 0.013 0 41.4 88.9 98.9 293.8 5.36 9.61 22.0 51.6
1964 6.29 7.49 2.55 0 0 3.94 347.1 79.0 30.0 5.13 5.09 7.10 40.8
1965 6.24 10.3 0.135 0 0 0.068 816.9 62.4 99.1 25.8 14.4 18.2 86.9
1966 50.9 17.3 5.04 0.729 0 581.2 163.1 100.0 31.1 33.3 71.6 8.41 89.7
1967 18.8 13.8 3.83 0.435 0.143 140.1 280.8 80.3 157.4 7.30 1.56 1.64 58.7
1968 11.7 16.0 3.81 0.132 0 25.7 66.1 47.7 29.8 12.4 4.27 11.1 19.1
1969 33.6 30.6 7.91 0.535 0 0 927.8 42.7 10.0 38.1 8.36 3.14 91.0
1970 9.16 12.9 5.34 1.83 1.86 8.76 162.7 61.6 62.3 8.23 1.23 2.12 28.0
1971 6.46 9.31 3.34 0.235 0 58.6 72.5 23.5 17.2 102.8 4.16 41.6 28.5
1972 36.3 76.7 14.4 2.99 1.19 314.1 158.5 175.5 21.4 5.13 7.43 4.31 68.5
1973 13.8 15.1 4.68 4.88 4.92 37.1 27.9 20.4 4.19 3.49 3.37 11.9 12.7
1974 26.0 13.2 9.74 0.733 0.050 5.46 255.1 84.0 22.8 4.32 6.79 1.35 35.7
1975 6.73 15.2 3.34 0.329 0.029 0.623 395.6 71.2 515.7 1,112 6.44 1.66 178.3
1976 8.82 14.8 5.35 0.835 0.372 73.1 80.3 10.2 1.30 1.22 0 0 16.4
1977 0.023 2.05 0.772 0.190 0.094 28.7 37.9 8.91 35.8 15.2 0.426 16.5 12.2
1978 51.1 32.8 23.5 13.1 5.29 450.8 679.0 29.9 8.69 7.67 1.06 2.89 108.9
1979 2.94 4.74 2.03 0.582 0.236 4.76 677.0 78.5 23.3 55.2 10.8 2.67 71.3
1980 4.10 18.2 5.04 1.64 2.11 38.9 275.5 8.28 7.73 0.217 2.17 5.60 30.4
1982 -- -- -- -- -- 211.1 248.3 45.8 6.00 7.72 2.47 -- --
1983 -- -- -- -- -- 114.4 43.7 32.0 8.03 312.4 12.3 -- --
1984 7.78 16.1 -- -- -- 441.5 156.8 27.3 129.5 5.76 0.014 0.161 --
1985 33.6 -- -- -- -- 148.3 75.1 146.2 267.4 32.8 26.7 72.8 --
1986 36.4 14.4 7.89 5.07 2.95 439.0 601.1 324.7 231.9 70.0 19.0 173.5 160.8
1987 45.1 27.8 20.8 7.84 14.0 213.4 86.3 44.3 8.11 5.45 6.92 8.62 41.0
1988 6.79 13.0 8.42 0 1.07 85.7 57.7 29.0 6.02 0 0.108 0.650 17.4
1989 3.00 7.40 3.64 2.18 2.88 10.9 694.8 25.5 9.98 1.64 0.032 12.6 63.8
1990 8.53 8.63 2.31 4.14 4.51 39.9 60.1 42.1 34.4 6.57 0.398 0.316 17.7
1991 5.71 9.50 5.03 1.38 4.00 31.2 47.4 85.1 34.7 65.7 3.59 3.78 24.9
1992 11.8 10.6 6.30 4.78 5.50 83.7 46.4 22.6 96.4 26.0 8.15 9.21 27.6
1993 2.54 20.3 8.42 3.00 2.22 155.1 215.8 50.7 81.6 425.4 152.2 11.3 94.9
1994 10.5 7.98 6.40 5.94 5.80 210.0 198.2 72.0 13.6 30.1 5.93 8.65 48.2
1995 27.1 40.9 10.6 5.00 4.69 341.2 115.7 76.6 9.19 26.3 3.46 5.42 56.1
1996 59.2 23.0 5.51 0.898 0.590 19.5 385.2 349.5 50.2 4.42 4.41 1.93 75.3
1997 9.81 14.1 2.12 1.14 0.995 1.11 1,683 100.8 75.8 158.2 12.8 17.7 171.5
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