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Last update: Wednesday, 23-Feb-2005 09:46:08 EST
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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 57.7 1942 0 m 3.46 12.2 3.51 3.52
November 8.60 1945 0 m 0.900 2.11 2.36 0.91
December 0.397 1945 0 m 0.060 0.12 1.93 0.07
January 0.213 1948 0 m 0.010 0.05 3.93 0.01
February 0.048 1948 0 m 0 0.01 4.80 0
March 38.6 1942 0 m 3.48 9.81 2.82 3.54
April 108 1942 0.100 1953 26.7 33.2 1.24 27.2
May 635 1950 0.006 1934 38.8 126 3.24 39.5
June 235 1950 0 m 16.4 47.0 2.86 16.7
July 86.6 1950 0 m 5.24 17.5 3.34 5.33
August 5.76 1950 0 m 0.630 1.48 2.37 0.64
September 47.1 1941 0 m 2.57 9.39 3.65 2.61
Annual 88.7 1950 0.096 1934 8.52 18.4 2.16 100
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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 0 0 0 0 0 0 0 0 0 0
90 0 0 0 0 0.10 0 0 0 0 0 0 0 0
85 0 0 0 0.10 0.10 0 0 0 0 0 0 0 0
80 0 0 0 0.26 0.17 0 0 0 0 0 0 0 0
75 0 0 0 0.43 0.30 0 0 0 0 0 0 0 0
70 0 0 0 0.69 0.40 0.10 0 0 0 0 0 0 0
65 0 0 0 1.10 0.52 0.10 0 0 0 0 0 0 0
60 0 0 0 1.80 0.69 0.16 0 0 0 0 0 0 0
55 0 0 0 2.90 0.90 0.27 0 0 0 0 0 0 0
50 0 0 0 5.18 1.20 0.57 0 0 0 0 0 0 0
45 0 0 0 7.76 2.10 0.94 0 0 0 0 0 0 0
40 0 0 0 11.5 4.44 2.00 0.10 0 0 0 0 0 0
35 0 0 0 15.9 6.65 2.50 0.20 0 0 0 0 0 0.10
30 0 0 0 23.4 12.0 4.88 0.40 0 0 0.10 0 0 0.17
25 0 0 0 32.4 19.1 8.17 0.64 0.10 0.20 0.19 0.10 0 0.52
20 0 0 0 42.3 30.5 14.4 1.30 0.18 0.40 0.37 0.27 0 1.20
15 0 0 0 52.9 46.1 19.1 3.20 0.49 1.00 2.10 1.40 0.10 4.23
10 0 0 0.25 82.7 63.3 29.9 7.09 1.40 2.00 6.03 3.30 0.19 11.5
5 0.10 0 15.0 128 130 87.0 27.6 5.00 5.35 15.3 4.60 0.40 38.2
______________________________________________________________________________________________________________________
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Probability of occurrence of annual high discharges
[ng, statistic not given]
__________________________________________________________________________________________________
Maximum mean 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 1.80 1.22 0.916 0.598 0.328
0.95 1.05 6.30 4.38 3.20 2.07 1.17
0.90 1.11 11.7 8.30 6.03 3.91 2.27
0.80 1.25 23.9 17.3 12.6 8.25 4.94
0.50 2 83.4 62.9 46.8 32.2 20.7
0.20 5 252 197 155 115 80.5
0.10 10 426 338 276 216 159
0.04 25 716 576 496 411 322
0.02 50 980 796 711 616 501
0.01 100 1,280 1,050 970 878 742
0.005 200 1,620 1,340 1,280 1,200 1,050
0.002 500 2,120 ng ng ng ng
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Probability of occurrence of annual low discharges
[ng, statistic not given]
____________________________________________________________________________________
Minimum mean 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 ng 0 0
0.10 10 ng ng ng ng ng ng ng 0 0
0.20 5 ng ng ng ng ng ng ng 0 0
0.50 2 ng ng ng ng ng ng ng 0 0
____________________________________________________________________________________
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Probability of occurrence of seasonal low discharges
[ng, statistic not given]
________________________________________________________________________________________
Minimum mean 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 ng ng 0
0.10 10 ng ng ng ng ng ng ng 0
0.20 5 ng ng ng ng ng ng ng 0
0.50 2 ng ng ng ng ng ng ng 0
June-July-August September-October-November
_________________________ ___________________________
0.05 20 ng ng 0 0 0 0 0 0
0.10 10 ng ng 0 0 0 0 0 0
0.20 5 ng ng 0 0 0 0 0 0
0.50 2 ng ng 0 0 0 0 0 0
________________________________________________________________________________________
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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
1930 May 12 3.10 226 1944 June 6 3.52 203
1931 April 8 1.90 38.0 1945 March 27 2.88 124
1932 April 15 1.90 59.0 1946 March 20 2.38 56.0
1933 May 26 2.68 126 1947 June 11 3.40 217
1934 April 9 1.06 15.0 1948 April 18 3.68 281
1935 April 15 -- 12.0 1949 April 13 -- 50.0
1936 April 14 1.20 8.00 1950 May 20 6.25 912
1937 April 30 3.80 277 1951 April 30 2.91 173
1938 June 2 1.20 8.00 1952 April 8 1.22 21.0
1941 September 25 4.06 290 1953 June 29 0.75 4.00
1942 April 4 -- 253 1954 June 15 1.97 50.0
1943 April 5 3.50 175 1955 April 22 2.92 151
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 May 20 6.25 912 1945 March 27 2.88 124
1941 September 25 4.06 290 1932 April 15 1.90 59.0
1948 April 18 3.68 281 1946 March 20 2.38 56.0
1937 April 30 3.80 277 1949 April 13 -- 50.0
1942 April 4 -- 253 1954 June 15 1.97 50.0
1930 May 12 3.10 226 1931 April 8 1.90 38.0
1947 June 11 3.40 217 1952 April 8 1.22 21.0
1944 June 6 3.52 203 1934 April 9 1.06 15.0
1943 April 5 3.50 175 1935 April 15 -- 12.0
1951 April 30 2.91 173 1936 April 14 1.20 8.00
1955 April 22 2.92 151 1938 June 2 1.20 8.00
1933 May 26 2.68 126 1953 June 29 0.75 4.00
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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
__________________________________________________________________________________________________________________________________
1929 -- -- -- -- -- -- 2.39 0.452 0.123 0 0 0 --
1930 0 0 0 0 0 0 6.97 38.0 0.300 0.081 0 0 3.84
1931 0 0 0 0 0 0.129 4.97 0.500 0.060 0.019 0 0 0.468
1932 0 0 0 0 0 0 22.1 4.18 0.013 0 0 0 2.16
1933 0 0 0 0 0 0.613 15.9 14.2 4.33 0 0 0 2.92
1934 0 0 0 0 0 0 1.16 0.006 0 0 0 0 0.096
1935 0 0 0 0 0 0 2.15 0.732 0.193 0.719 0 0 0.316
1936 0 0 0 0 0 0 1.18 0.268 0 0 0 0 0.119
1937 0 0 0 0 0 0 19.7 24.2 1.19 1.35 0.845 0 3.96
1938 0 0 0 0 0 0.577 0.687 3.14 3.15 0 0 0 0.632
1941 -- -- -- -- -- -- 21.5 10.2 17.3 0.265 0 47.1 --
1942 57.7 4.73 0.329 0 0 38.6 107.9 42.9 4.40 0 0 3.25 21.7
1943 0 0 0 0 0 0 54.7 19.3 23.5 5.91 0.603 0 8.62
1944 0 0 0 0 0 0 8.14 0.410 37.9 1.85 0.200 4.85 4.38
1945 0.706 8.60 0.397 0.052 0 27.3 34.5 32.0 2.25 0.497 0 2.57 9.11
1946 0.532 0 0 0 0 12.7 6.58 0.261 0 0 0 0 1.68
1947 0 0 0 0 0 0 6.03 1.81 40.8 2.25 3.07 1.58 4.59
1948 3.47 1.12 0.200 0.213 0.048 0 88.9 53.9 10.5 19.5 4.33 0.033 15.2
1949 0 0 0 0 0 0 21.7 4.26 0.890 0.803 0.294 0 2.32
1950 3.95 3.78 0.248 0 0 0 80.8 634.9 235.0 86.6 5.76 4.21 88.7
1951 12.8 2.21 0.248 0 0 0 90.8 70.3 3.60 0.026 0.206 0.257 15.1
1952 0.258 0.090 0.035 0 0 0 4.96 0.106 0.070 0 0 0 0.453
1953 0 0 0 0 0 0.032 0.100 0.135 1.07 0.335 0.039 0 0.142
1954 0 0 0 0 0 0 5.41 6.34 11.4 0.429 0.068 0.080 1.97
1955 0.110 0.100 0.016 0 0 0 59.2 7.34 12.5 10.3 0.268 0.320 7.46
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U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:46:08 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05096000.html |
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