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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 51.1 1996 0 1953 6.34 12.5 1.98 0.67
November 19.4 1958 1.75 1953 7.44 5.71 0.77 0.78
December 7.33 1958 0.632 1956 3.57 2.53 0.71 0.38
January 3.21 1996 0.016 1956 1.18 1.09 0.92 0.12
February 3.57 1954 0 m 0.56 0.93 1.67 0.06
March 952 1995 0 1956 116 246 2.12 12.2
April 2,960 1997 21.0 1953 522 738 1.41 54.9
May 620 1950 6.30 1955 128 201 1.57 13.5
June 716 1953 6.52 1954 91.4 178 1.94 9.63
July 280 1997 2.90 1956 50.5 77.4 1.53 5.32
August 51.1 1953 0.042 1946 11.8 15.6 1.32 1.24
September 51.6 1995 0 1949 10.8 16.3 1.50 1.14
Annual 340 1997 11.1 1954 74.9 91.6 1.22 100
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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 16.8 5.84 3.70 1.20 0 0 0 0.10 0.10 0
90 0 0 0 20.1 7.12 5.16 2.10 0.10 0 0 1.40 0.38 0
85 0 0 0 24.3 9.38 6.17 4.22 0.27 0 0 2.00 0.74 0.10
80 0.10 0 0 29.8 12.2 6.80 5.29 0.45 0.10 0.10 2.40 1.00 0.27
75 0.10 0 0 36.0 14.4 7.87 6.60 0.74 0.19 0.18 2.90 1.00 0.53
70 0.10 0 0.10 43.8 16.4 9.75 8.38 1.20 0.19 0.27 3.40 1.20 1.00
65 0.30 0 0.10 54.2 18.3 11.6 9.47 2.00 0.37 0.50 4.10 1.50 2.00
60 0.48 0.10 0.18 66.1 20.5 13.6 11.3 2.60 0.70 0.61 4.10 1.70 2.84
55 0.79 0.20 0.46 82.0 22.7 15.5 13.2 3.91 1.10 1.10 4.90 2.40 3.93
50 1.00 0.20 0.84 109 26.7 17.6 14.7 4.61 2.10 2.00 5.90 2.80 4.58
45 1.00 0.20 3.56 137 31.2 20.0 16.4 5.06 3.20 3.00 6.21 2.80 6.12
40 1.10 0.20 4.63 178 36.6 23.8 18.7 5.81 4.00 3.70 6.51 3.40 7.86
35 1.50 0.37 11.7 240 45.9 29.3 21.2 6.49 4.99 4.51 6.92 4.00 10.5
30 1.80 0.47 20.3 353 60.8 36.7 27.5 9.78 6.75 5.29 7.51 4.00 14.6
25 1.80 0.47 28.6 529 96.4 47.5 35.6 12.4 13.8 6.00 8.70 4.70 19.5
20 1.80 0.59 41.4 690 165 66.7 60.3 15.5 19.5 7.11 11.9 5.63 26.6
15 2.30 1.20 90.9 1,040 221 86.0 89.0 21.5 24.3 9.17 14.4 6.74 41.5
10 3.00 1.20 240 1,640 388 130 148 28.0 33.9 13.6 17.8 8.06 82.7
5 3.40 2.50 866 2,730 677 262 240 40.1 54.0 35.4 23.0 9.27 260
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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 56.4 152.0 45.4 28.3 22.6
0.95 1.05 138 1129 100 63.1 45.0
0.90 1.11 219 1210 154 97.7 66.3
0.80 1.25 380 356 262 167 108
0.50 2 1,060 934 732 483 292
0.20 5 2,810 2,520 2,100 1,450 857
0.10 10 4,600 4,270 3,690 2,610 1,550
0.04 25 7,690 7,570 6,770 4,950 3,010
0.02 50 10,600 110,400 19,700 7,540 4,670
0.01 100 14,200 114,000 113,500 11,100 7,010
0.005 200 18,400 118,100 117,700 15,700 10,200
0.002 500 25,100 ng ng ng ng
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1Statistical adjustment based on correlation between 3-, 7-, 15-,
and 30-consecutive-day periods.
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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
Annual peak discharge, by year, and corresponding gage height
1944 April 8 8.16 177 1953 June 17 18.62 4,840
1945 April 12 8.59 373 1954 March 21 8.62 200
1946 March 21 13.15 550 1955 April 2 12.40 500
1947 April 14 18.04 3,880 1956 April 14 11.51 630
1948 April 7 17.28 1,500 1957 June 23 8.52 430
1949 April 3 14.75 850 1958 April 10 7.57 195
1950 April 2 17.73 1,980 1995 March 30 20.33 2,360
1951 April 7 12.50 750 1996 April 16 21.68 3,460
1952 April 6 18.90 3,850 1997 April 16 23.76 7,150
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 16 23.76 7,150 1951 April 7 12.50 750
1953 June 17 18.62 4,840 1956 April 14 11.51 630
1947 April 14 18.04 3,880 1946 March 21 13.15 551
1952 April 6 18.90 3,850 1955 April 2 12.40 500
1996 April 16 21.68 3,460 1957 June 23 8.52 430
1995 March 30 20.33 2,360 1945 April 12 8.59 373
1950 April 2 17.73 1,980 1954 March 21 8.62 200
1948 April 7 17.28 1,500 1958 April 10 7.57 195
1949 April 3 14.75 850 1944 April 8 8.16 177
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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
__________________________________________________________________________________________________________________________________
1944 -- -- -- -- -- -- 59.1 56.3 23.2 12.9 12.9 9.95 --
1945 5.06 14.5 4.84 0.329 0 93.2 86.4 25.2 16.5 3.60 3.37 0.467 21.2
1946 1.32 2.35 0.794 0.100 0.032 115.8 69.8 8.82 9.37 4.41 0.042 0.127 17.9
1947 5.96 5.48 1.28 0.129 0 100.7 945.6 59.3 353.2 17.9 1.02 4.04 123.4
1948 2.38 6.48 5.61 2.58 0.324 6.33 517.5 51.3 19.5 13.8 9.14 1.55 52.4
1949 0.694 6.20 1.75 0.042 0 8.96 209.1 15.4 8.07 7.26 0.229 0 21.3
1950 0.474 2.73 1.00 0.042 0 86.1 926.7 619.6 76.7 65.2 6.46 2.46 149.0
1951 4.29 3.55 1.36 0.710 0.200 7.37 234.1 16.1 11.6 11.4 6.02 10.8 25.4
1952 4.61 6.10 6.32 1.45 0.355 0.242 905.9 25.7 6.67 48.7 0.552 0.007 82.7
1953 0 1.75 1.99 1.42 1.47 25.0 21.0 88.5 716.5 63.4 51.1 1.78 80.7
1954 0.797 5.90 5.17 2.48 3.57 38.4 37.1 14.1 6.52 12.9 2.56 3.15 11.1
1955 0.787 3.37 3.05 1.48 0.250 0.184 117.9 6.30 13.4 63.2 9.47 0.280 18.3
1956 0.619 1.99 0.632 0.016 0 0 114.1 27.3 13.6 2.90 0.487 0.243 13.4
1957 0.019 7.42 1.89 0.497 0.150 7.10 27.1 13.5 54.3 13.8 15.2 25.5 13.8
1958 10.3 19.4 7.33 2.35 0.586 31.8 74.8 16.9 15.7 42.4 3.09 5.11 19.2
1995 -- -- -- -- -- 951.5 692.9 300.5 46.2 226.1 47.7 51.6 --
1996 51.1 15.1 6.97 3.21 1.37 501.8 1,398 362.5 88.9 18.7 13.2 39.0 207.5
1997 13.1 16.7 7.11 2.09 0.579 3.07 2,956 597.6 166.2 280.2 29.7 38.6 340.4
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