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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 12.8 1947 0.200 1954 3.60 3.69 1.02 0.57
November 9.00 1947 0.487 1946 2.91 2.56 0.88 0.46
December 3.71 1952 0.035 1951 0.92 1.12 1.22 0.15
January 1.52 1947 0 m 0.29 0.53 1.84 0.05
February 0.821 1953 0 m 0.13 0.31 2.34 0.02
March 284 1946 0 1952 80.0 89.5 1.12 12.7
April 1,580 1952 27.8 1949 307 447 1.46 48.9
May 320 1950 1.99 1949 86.0 91.9 1.07 13.7
June 277 1944 0 1955 77.5 83.3 1.07 12.3
July 272 1949 5.46 1955 59.2 74.2 1.25 9.42
August 39.2 1943 0 1955 7.87 10.6 1.35 1.25
September 16.1 1943 0 m 3.05 4.40 1.44 0.49
Annual 160 1952 4.39 1955 50.8 41.7 0.82 100
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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 5.87 0.90 0.05 0.05 0 0 0 0.18 0 0
90 0 0 0 10.4 2.70 1.70 2.20 0 0 0.10 0.40 0 0
85 0 0 0 15.7 6.16 3.10 2.90 0.18 0 0.20 0.54 0 0
80 0 0 0 22.7 10.1 5.13 4.91 0.45 0 0.35 0.74 0 0
75 0 0 0 29.0 13.3 7.89 6.31 0.79 0 0.60 0.86 0 0
70 0 0 0 35.4 17.0 11.7 8.74 1.40 0 1.00 1.00 0 0.28
65 0 0 0 44.1 22.3 15.1 11.2 1.70 0.27 1.40 1.20 0.10 0.55
60 0 0 0 55.3 28.9 18.9 13.8 2.50 0.38 1.70 1.60 0.20 1.10
55 0 0 0 67.0 40.7 24.8 16.4 3.00 0.76 1.70 1.90 0.28 1.50
50 0 0 0.74 88.5 56.2 34.1 20.3 3.60 1.20 2.10 1.90 0.40 2.20
45 0 0 2.30 111 65.7 41.6 25.8 4.30 1.50 2.10 2.20 0.50 3.39
40 0 0 5.03 150 75.6 49.7 32.3 4.30 2.10 2.50 2.20 0.56 4.59
35 0 0 9.86 190 86.1 60.9 41.0 5.66 2.50 2.50 2.90 0.80 6.62
30 0.10 0 17.5 231 97.1 73.9 49.1 6.31 2.90 3.00 2.90 1.00 10.7
25 0.19 0 41.3 285 111 94.3 56.0 8.13 3.40 3.50 3.40 1.10 17.1
20 0.56 0 65.9 360 126 122 69.7 11.3 4.10 4.20 4.00 1.80 32.1
15 0.74 0 110 467 160 149 86.4 14.2 4.80 6.02 4.70 2.50 56.6
10 1.50 0.58 242 669 202 185 117 25.4 7.52 10.1 6.40 2.80 103
5 1.50 1.00 496 1,060 282 303 203 38.3 16.5 13.9 9.47 4.00 235
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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 1.01 104 123 68.0 35.8 19.8
0.95 1.05 213 205 136 80.4 49.5
0.90 1.11 312 276 196 121 77.8
0.80 1.25 496 403 304 195 130
0.50 2 1,210 882 695 458 312
0.20 5 2,940 2,100 1,560 998 661
0.10 10 4,680 3,420 2,370 1,460 933
0.04 25 7,690 5,920 3,690 2,130 1,300
0.02 50 10,600 8,550 4,880 2,700 1,590
0.01 100 14,200 12,000 6,280 3,320 1,870
0.005 200 18,400 16,600 7,900 3,970 2,160
0.002 500 25,400 ng ng ng ng
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Probability of annual low discharges
[ng, statistic not given]
____________________________________________________________________________________
Minimum average 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 ng ng ng ng ng ng 0 0.043 0.204
0.10 10 ng ng ng ng ng ng 0 0.077 0.296
0.20 5 ng ng ng ng ng ng 0 0.148 0.459
0.50 2 ng ng ng ng ng ng 0.019 0.445 1.05
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Probability of seasonal low discharges
[ng, statistic not given]
_____________________________________________________________________________________
Minimum average 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 ng ng ng ng ng 0 0 0
0.10 10 ng ng ng ng ng 0 0 0.108
0.20 5 ng ng ng ng ng 0 0 1.45
0.50 2 ng ng ng ng ng 0 0 12.9
June-July-August September-October-November
_________________________ ___________________________
0.05 20 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0.422 0 0 0 0.009
0.20 5 0 0 0.165 1.08 0 0 0 0.115
0.50 2 0.947 1.31 1.74 3.56 0 0.142 0.318 0.860
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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
1944 June 4 8.92 1,030 1950 March 28 10.51 1,140
1945 March 15 -- 490 1951 April 7 -- 2,800
1946 March 20 -- 1,580 1952 April 9 13.73 13,700
1947 April 12 10.65 1,720 1953 March 23 7.10 532
1948 March 30 10.95 1,670 1954 June 8 7.91 794
1949 July 10 9.87 1,280 1955 April 1 -- 178
Annual peak discharge, from highest to lowest, and corresponding gage height
1952 April 9 13.73 13,700 1950 March 28 10.51 1,140
1951 April 7 -- 2,800 1944 June 4 8.92 1,030
1947 April 12 10.65 1,720 1954 June 8 7.91 794
1948 March 30 10.95 1,670 1953 March 23 7.10 532
1946 March 20 -- 1,580 1945 March 15 -- 490
1949 July 10 9.87 1,280 1955 April 1 -- 178
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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
__________________________________________________________________________________________________________________________________
1943 -- -- -- -- -- -- -- 81.5 213.9 91.1 39.2 16.1 --
1944 5.82 2.39 0.500 0 0 13.1 44.0 95.9 276.9 45.9 6.78 5.63 41.2
1945 2.58 6.57 0.268 0 0 121.8 63.1 19.0 42.4 7.12 0.948 0.663 22.2
1946 0.810 0.487 0.335 0 0 284.1 111.1 18.0 6.66 45.2 3.09 2.92 39.8
1947 12.8 9.00 2.56 1.52 0.746 28.2 579.6 149.5 104.9 21.0 1.42 0.453 75.5
1948 1.71 1.43 0.510 0.097 0 161.0 294.1 57.9 13.5 7.65 3.98 0.130 45.1
1949 0.397 0.760 0.113 0 0 40.9 27.8 1.99 6.62 271.6 13.8 1.51 30.9
1950 5.00 3.89 0.790 0 0 147.1 334.9 320.1 60.3 124.1 7.76 0.487 84.2
1951 3.15 1.58 0.035 0 0 0.242 522.1 113.4 78.4 39.7 4.56 2.26 63.4
1952 7.25 3.36 3.71 1.15 0 0 1,582 194.8 40.7 86.5 16.2 4.27 159.9
1953 0.361 0.860 1.13 0.655 0.821 136.8 63.6 34.3 58.7 16.3 0.552 0 26.3
1954 0.200 1.65 0.126 0 0 17.4 35.1 29.1 104.4 8.17 4.01 5.25 17.0
1955 3.15 2.92 0.906 0.029 0 8.75 28.9 2.60 0 5.46 0 0 4.39
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