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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 30.9 1917 0 m 3.29 6.58 2.00 0.60
November 41.3 1958 0 m 3.82 8.15 2.13 0.69
December 4.47 1958 0 m 0.94 1.26 1.34 0.17
January 3.80 1917 0 m 0.39 0.83 2.14 0.07
February 11.0 1958 0 m 0.63 1.87 2.94 0.12
March 435 1946 0.039 1934 76.6 110 1.43 13.9
April 1,770 1952 1.33 1931 237 369 1.56 43.0
May 571 1942 0.129 1934 74.6 124 1.67 13.5
June 524 1942 0.090 1934 74.7 127 1.69 13.6
July 821 1916 0 m 63.3 153 2.42 11.5
August 108 1916 0 m 10.1 22.2 2.19 1.84
September 44.1 1916 0 m 5.83 11.2 1.92 1.06
Annual 176 1952 0.192 1934 45.9 46.9 1.02 100
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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 1.80 0.58 0.10 0 0 0 0 0 0 0
90 0 0 0 3.70 1.00 0.32 0 0 0 0 0 0 0
85 0 0 0 5.14 2.50 1.00 0.10 0 0 0 0 0 0
80 0 0 0 7.76 3.41 1.40 0.32 0 0 0 0 0 0
75 0 0 0 12.2 4.30 2.40 1.00 0.09 0 0 0 0 0
70 0 0 0 18.2 6.69 3.53 1.90 0.16 0 0 0 0 0
65 0 0 0.08 24.3 8.80 4.42 2.50 0.30 0.04 0 0 0 0.17
60 0 0 0.78 32.3 11.2 5.93 3.77 0.55 0.19 0 0.09 0 0.38
55 0 0 1.10 41.8 14.0 7.35 4.36 1.00 0.26 0.08 0.26 0 0.84
50 0 0 3.17 48.9 17.9 9.10 5.40 1.90 0.47 0.10 0.59 0.10 1.30
45 0 0 5.01 57.4 21.6 12.8 8.19 1.90 1.10 0.47 1.10 0.18 1.90
40 0 0 10.5 73.5 25.3 21.3 13.4 2.60 1.50 1.00 1.70 0.49 3.28
35 0 0.03 16.9 98.6 33.1 31.5 18.9 4.08 2.10 1.50 1.70 0.68 4.88
30 0.10 0.09 20.8 141 50.6 48.1 27.4 5.23 2.80 1.80 2.50 0.95 7.52
25 0.36 0.36 34.1 215 71.9 68.8 38.4 6.96 3.87 2.70 3.10 1.30 12.5
20 0.68 0.45 48.6 314 94.0 92.8 52.6 9.78 5.29 3.30 3.90 1.80 22.0
15 0.88 0.87 93.3 446 119 133 72.1 15.1 9.19 5.23 5.62 2.10 41.1
10 1.30 0.87 171 593 186 198 106 23.8 18.1 10.5 8.01 2.50 78.7
5 2.20 1.70 380 1,130 332 328 247 50.3 36.5 20.0 24.2 3.50 206
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Probability of annual high discharges
[ng, statistic not given]
__________________________________________________________________________________________________
Maximum average discharge
(ft3/s)1
___________________________________________________________
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 7.17 4.43 2.62 1.70
0.95 1.05 81.0 35.8 23.6 14.5 9.19
0.90 1.11 144 76.2 52.0 32.4 20.4
0.80 1.25 281 174 123 78.2 49.1
0.50 2 913 649 493 320 202
0.20 5 2,620 1,760 1,420 935 606
0.10 10 4,340 2,640 2,200 1,450 957
0.04 25 7,170 3,780 3,230 2,140 1,440
0.02 50 9,730 4,570 3,980 2,640 1,800
0.01 100 12,700 5,310 4,690 3,100 2,140
0.005 200 16,000 5,970 5,340 3,530 2,470
0.002 500 20,800 ng ng ng ng
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1 Statistics computed using period of daily value
record 1916-58.
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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
1916 -- 17.40 2,980 1947 April 13 14.68 2,710
1917 April 1 14.73 2,250 1948 April 1 -- 2,080
1918 -- -- -- 1949 July 12 12.98 1,770
1919 June 5 7.37 559 1950 May 11 -- 1,690
1920 May 11 9.50 970 1951 April 8 -- 3,180
1921 April 2 5.50 287 1952 April 10 16.56 7,320
1922 March 22 13.08 1,330 1953 March 26 -- 572
1923 April 15 -- 746 1954 June 9 6.61 393
1924 April 5 2.65 45.0 1955 July 13 5.58 484
1931 June 10 1.80 41.0 1956 May 29 -- 655
1932 April 8 4.50 300 1957 April 21 10.68 1,610
1933 March 2 4.84 78.0 1958 April 8 6.84 690
1934 April 10 1.36 9.10 1985 May 31 9.37 1,190
1935 March 17 -- 120 1986 March 29 18.91 5,500
1936 March 23 10.51 354 1987 June 1 4.78 275
1937 May 1 -- 400 1988 May(a) -- 250
1938 July 4 6.42 267 1989 March 29 20.01 5,400
1939 March 25 13.62 1,420 1990 April 4 3.83 130
1940 April 2 8.08 349 1991 July 2 11.22 1,420
1941 June 23 -- 240 1992 March 7 5.45 220
1942 May 17 14.08 1,480 1993 March 30 18.07 4,400
1943 April 4 -- 1,940 1994 March 25 16.95 4,310
1944 June 6 13.29 1,520 1995 March 14 19.30 5,100
1945 March 16 -- 892 1996 April 9 15.19 2,000
1946 March 21 14.56 2,460 1997 April 7 23.63 8,800
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 7 23.63 8,800 1944 June 6 13.29 1,520
1952 April 10 16.56 7,320 1942 May 17 14.08 1,480
1986 March 29 18.91 5,500 1939 March 25 13.62 1,420
1989 March 29 20.01 5,400 1991 July 2 11.22 1,420
1995 March 14 19.30 5,100 1922 March 22 13.08 1,330
1993 March 30 18.07 4,400 1985 May 31 9.37 1,190
1994 March 25 16.95 4,310 1920 May 11 9.50 970
1951 April 8 -- 3,180 1945 March 16 -- 892
1916 -- 17.40 2,980 1923 April 15 -- 746
1947 April 13 14.68 2,710 1958 April 8 6.84 690
1946 March 21 14.56 2,460 1956 May 29 -- 655
1917 April 1 14.73 2,250 1953 March 26 -- 572
1948 April 1 -- 2,080 1919 June 5 7.37 559
1996 April 9 15.19 2,000 1955 July 13 5.58 484
1943 April 4 -- 1,940 1937 May 1 -- 400
1949 July 12 12.98 1,770 1954 June 9 6.61 393
1950 May 11 -- 1,690 1936 March 23 10.51 354
1957 April 21 10.68 1,610 1940 April 2 8.08 349
1932 April 8 4.50 300 1990 April 4 3.83 130
1921 April 2 5.50 287 1935 March 17 -- 120
1987 June 1 4.78 275 1933 March 2 4.84 78.0
1938 July 4 6.42 267 1924 April 5 2.65 45.0
1988 May1 -- 250 1931 June 10 1.80 41.0
1941 June 23 -- 240 1934 April 10 1.36 9.10
1992 March 7 5.45 220
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(a)Day of month unknown.
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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]
__________________________________________________________________________________________________________________________________
Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
__________________________________________________________________________________________________________________________________
1916 4.80 4.00 2.40 2.40 1.80 37.0 663.0 107.0 201.7 820.8 108.3 44.1 166.7
1917 30.9 26.1 2.90 3.80 2.50 261.0 642.6 159.2 17.7 3.13 1.84 2.00 96.1
1919 0.600 0.900 0.600 0.700 0.500 16.0 50.0 20.0 122.3 31.0 5.28 0.910 20.6
1920 1.89 1.80 0.900 1.40 1.00 118.3 33.2 83.2 110.7 92.9 6.29 2.12 38.0
1921 1.67 2.86 1.65 1.00 1.07 4.48 59.5 16.1 4.00 3.03 0.710 4.14 8.31
1922 1.87 1.40 1.00 0.700 0.500 380.6 273.5 26.3 3.85 0.639 0.065 0.097 57.9
1923 0.080 0.060 0.050 0.040 0.030 0.040 197.7 5.90 3.98 2.87 0.092 0.009 17.4
1924 0.126 0.380 0.200 0.100 0.100 1.00 12.9 2.85 1.96 1.24 0.226 1.51 1.87
1931 0 0 0 0 0 2.60 1.33 0.642 3.51 1.36 1.95 4.17 1.30
1932 0 0 0 0 0.259 4.10 25.7 2.68 0.890 .071 0 0 2.78
1933 0 0 0 0 0.675 14.3 5.54 4.28 2.30 0.032 0 0 2.28
1934 0 0 0 0 0 0.039 2.07 0.129 0.090 0 0 0 0.192
1935 0 0 0 0 0.100 42.6 5.47 10.5 13.9 16.0 0.439 0 7.50
1936 0 0 0 0 0 55.9 22.0 5.08 0.610 0 0 0 7.02
1937 0 0 0 0 0 13.0 172.4 66.3 6.48 15.5 2.46 0.100 23.0
1938 0 0 0 0 0.536 46.9 5.65 12.4 12.2 49.7 0.194 13.9 11.9
1939 0 0 0 0.029 0 213.9 28.1 3.82 4.61 3.73 0.445 0 21.5
1940 0 0 0 0 0 0.839 103.6 11.1 0.423 0 0 0 9.54
1941 0 0 0 0 0 35.6 55.7 4.65 28.0 1.94 11.8 32.2 14.1
1942 9.11 3.83 4.11 0 0 7.52 24.2 571.0 523.6 25.7 13.5 38.6 102.1
1943 14.5 13.9 1.28 0 0 43.0 742.7 81.3 266.3 88.5 44.3 12.3 108.3
1944 4.44 7.31 2.40 0 0 5.36 45.3 135.1 500.3 60.4 7.14 4.32 63.9
1945 2.85 5.84 2.08 0 0 192.8 76.8 24.0 52.6 3.98 0.632 0 30.3
1946 0.094 0.267 0 0 0 435.3 126.2 15.1 3.48 63.4 2.21 1.86 54.7
1947 10.8 7.11 1.73 0.097 0.275 107.1 977.5 185.7 106.1 17.4 0.558 0 117.1
1948 0 0.463 0.306 0 0 250.7 579.2 53.2 12.3 18.1 3.72 0.187 76.2
1949 0.110 0.370 0.045 0 0 72.7 44.3 2.85 6.82 429.7 16.0 1.50 48.6
1950 2.65 3.91 0.432 0 0 68.5 498.4 470.7 74.4 256.2 14.8 1.04 116.6
1951 2.42 1.47 0.181 0.010 0.393 0.065 673.3 117.0 82.7 43.7 5.25 1.96 76.8
1952 4.70 6.81 3.54 2.03 1.27 1.38 1,767 224.8 50.3 69.0 7.97 4.68 176.5
1953 0.261 0.433 1.09 0.739 0.821 153.8 73.1 42.1 92.8 35.7 1.34 0 33.7
1954 0.006 0.743 0.229 0 0 17.1 43.6 26.3 91.1 9.16 5.86 5.73 16.6
1955 2.84 3.54 0.806 0.039 0 16.7 61.0 3.49 18.3 68.7 3.72 0.570 15.0
1956 0.177 0.007 0 0 0 0.058 143.1 70.7 40.2 6.82 75.3 4.50 28.3
1957 0.481 2.89 1.49 0.100 0 33.7 169.0 98.8 221.4 34.5 20.4 25.0 50.5
1958 20.9 41.3 4.47 0.729 11.0 103.7 123.9 21.0 7.20 4.01 1.55 2.20 28.5
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