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Last update: Tuesday, 31-Aug-2004 10:28:19 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 7.77 1952 0.068 1953 2.55 2.66 1.04 1.21
November 5.48 1947 0.440 1953 2.23 1.79 0.80 1.06
December 2.24 1952 0.032 1951 0.580 0.73 1.26 0.28
January 0.813 1952 0 m 0.130 0.25 2.01 0.06
February 0.304 1953 0 m 0.050 0.10 2.03 0.02
March 78.0 1946 0 m 18.7 26.1 1.40 8.88
April 311 1952 12.6 1949 86.6 93.2 1.08 41.2
May 153 1950 1.64 1949 39.2 42.8 1.09 18.7
June 89.2 1944 3.19 1946 29.1 27.9 0.96 13.9
July 111 1949 2.47 1948 24.4 29.6 1.21 11.6
August 25.4 1943 0.342 1945 4.60 6.75 1.47 2.19
September 8.63 1943 0 1953 2.00 2.40 1.20 0.95
Annual 36.2 1952 5.40 1955 16.8 10.3 0.62 100
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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 3.40 1.20 0.79 0.74 0 0 0 0 0 0
90 0 0 0 6.20 2.50 1.60 1.60 0.10 0 0 0.18 0 0
85 0 0 0 7.79 3.10 2.50 2.60 0.20 0 0.10 0.28 0 0
80 0 0 0 10.3 4.69 3.90 3.44 0.49 0 0.19 0.49 0 0
75 0 0 0 12.4 5.71 5.51 4.03 0.70 0.10 0.26 0.49 0 0
70 0 0 0 14.7 7.16 6.66 4.52 0.99 0.19 0.59 0.66 0 0.17
65 0 0 0 18.6 9.52 8.00 4.92 1.20 0.30 0.70 1.00 0 0.39
60 0 0 0 27.4 12.5 8.73 5.54 1.40 0.47 0.97 1.20 0 0.67
55 0 0 0 34.4 16.4 12.7 6.24 1.70 0.65 1.30 1.20 0 1.20
50 0 0 0 40.7 23.1 15.2 8.09 2.00 0.88 1.60 1.40 0.10 1.50
45 0 0 0 47.3 28.2 17.5 10.2 2.40 1.00 1.80 1.80 0.19 2.00
40 0 0 0.26 56.0 34.0 20.4 12.5 2.40 1.20 1.80 1.80 0.38 2.60
35 0 0 1.80 69.2 40.4 24.9 14.5 2.90 1.60 2.20 2.10 0.38 4.16
30 0 0 2.90 100 47.4 30.0 20.5 3.40 2.20 2.60 2.40 0.64 5.32
25 0 0 7.00 116 55.0 41.2 30.8 4.10 2.20 2.60 2.80 0.79 8.38
20 0.19 0 15.3 137 64.3 52.5 38.1 4.90 2.60 3.50 3.20 1.20 13.0
15 0.29 0 37.2 164 79.7 63.0 46.8 7.32 3.60 4.90 3.80 2.00 24.0
10 0.40 0 73.2 216 102 79.4 59.7 12.7 4.90 7.28 5.00 2.00 46.0
5 0.56 0.10 126 324 130 107 82.9 23.5 9.22 9.36 5.80 2.40 93.1
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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 45.2 38.6 30.9 21.4 16.1
0.95 1.05 78.5 66.2 52.2 37.0 27.8
0.90 1.11 105 87.9 68.9 49.4 37.0
0.80 1.25 149 124 96.4 69.8 52.1
0.50 2 290 235 183 133 98.6
0.20 5 559 440 346 250 183
0.10 10 784 607 481 345 251
0.04 25 1,120 854 685 485 350
0.02 50 1,420 1,060 859 602 432
0.01 100 1,740 1,290 1,050 730 522
0.005 200 2,100 1,540 1,270 869 619
0.002 500 2,640 ng ng ng ng
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Probability of annual low discharges
[ng, statistics 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 0.163
0.10 10 ng ng ng ng ng ng 0 0.030 0.224
0.20 5 ng ng ng ng ng ng 0 0.093 0.330
0.50 2 ng ng ng ng ng ng 0 0.268 0.705
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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
0.20 5 ng ng ng ng ng 0 0 0
0.50 2 ng ng ng ng ng 0 0 3.84
June-July-August September-October-November
__________________________ _________________________
0.05 20 0 0 0.015 0.370 0 0 0 0
0.10 10 0 0 0.040 0.522 0 0 0 0
0.20 5 0 0.086 0.123 0.809 0 0 0 0.040
0.50 2 0.392 0.644 0.820 1.99 0 0.089 0.245 0.759
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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
1944 June 5 9.50 186 1950 May 9 -- 440
1945 March 16 8.32 186 1951 April 7 -- 534
1946 March 20 -- 310 1952 April 9 14.19 1,550
1947 April 11 12.35 431 1953 June 27 -- 77.0
1948 April 3 -- 132 1954 June 8 8.84 280
1949 July 10 10.75 422 1955 July 13 2.17 162
Annual peak discharge, from highest to lowest, and corresponding gage height
1952 April 9 14.19 1,550 1954 June 8 8.84 280
1951 April 7 -- 534 1944 June 5 9.50 186
1950 May 9 -- 440 1945 March 16 8.32 186
1947 April 11 12.35 431 1955 July 13 2.17 162
1949 July 10 10.75 422 1948 April 3 -- 132
1946 March 20 -- 310 1953 June 27 -- 77.0
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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
__________________________________________________________________________________________________________________________________
1943 -- -- -- -- -- -- -- 42.4 78.2 52.0 25.4 8.63 --
1944 3.48 1.70 0.048 0 0 3.49 17.7 53.3 89.2 32.4 4.64 3.38 17.4
1945 2.08 5.26 0.145 0 0 64.3 52.5 13.5 10.6 3.29 0.342 1.30 12.8
1946 0.897 0.503 0.290 0 0 78.0 62.2 6.99 3.19 15.1 1.14 2.30 14.3
1947 7.68 5.48 1.77 0.361 0.089 12.7 196.0 74.9 41.4 7.70 1.63 0.300 29.1
1948 0.668 0.807 0.039 0 0 0.645 58.0 12.7 4.15 2.47 1.09 0.147 6.66
1949 0.413 0.573 0.097 0 0 22.4 12.6 1.64 4.25 111.0 10.1 1.25 13.9
1950 2.63 3.18 0.629 0 0 22.3 121.1 152.9 26.0 21.0 2.56 0.423 29.5
1951 2.78 1.41 0.032 0 0.214 0 156.3 52.6 29.5 15.0 3.60 1.93 21.8
1952 7.77 3.52 2.24 0.813 0 0 311.0 69.4 16.3 22.5 3.36 1.53 36.2
1953 0.068 0.440 0.900 0.316 0.304 15.9 21.8 13.6 15.7 2.74 0.442 0 6.02
1954 0.135 1.35 0.097 0 0 2.93 14.8 13.4 47.0 7.45 3.58 4.46 7.90
1955 1.96 2.49 0.684 0.016 0 1.29 15.5 2.74 13.1 24.6 1.93 .290 5.40
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