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Last update: Wednesday, 23-Feb-2005 09:46:09 EST
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Statistics of monthly and annual mean discharges
[m, more than 1 year of occurrence; ng, statistic not given]
__________________________________________________________________________________________________________
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 43.5 1951 0 m 3.70 9.74 2.63 1.74
November 7.88 1945 0 m 1.37 2.57 1.88 0.64
December 0.945 1948 0 m 0.070 0.21 2.87 0.04
January 0.084 1948 0 m 0 0.02 4.69 0
February 0 m 0 m 0 0 ng 0
March 55.2 1945 0 m 5.35 14.0 2.62 2.52
April 245 1942 0.267 1953 62.2 64.2 1.03 29.3
May 714 1950 0.081 1934 78.2 151 1.94 36.8
June 297 1950 0.107 1952 39.6 65.0 1.64 18.6
July 175 1950 0 m 14.3 36.6 2.56 6.71
August 34.0 1950 0 m 3.60 7.89 2.19 1.70
September 39.8 1942 0 m 4.24 9.84 2.32 2.00
Annual 111 1950 0.276 1934 17.1 24.4 1.43 100
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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 0.05 0 0.10 0 0 0 0 0 0 0 0
90 0 0 0.11 0 0.18 0 0 0 0 0 0 0 0
85 0 0 0.16 0.10 0.56 0.10 0 0 0 0 0 0 0
80 0 0 0.22 0.69 0.99 0.16 0 0 0 0 0 0 0
75 0 0 0.27 1.40 1.30 0.27 0 0 0 0 0 0 0
70 0 0 0.33 3.00 1.80 0.44 0.10 0 0 0 0 0 0
65 0 0 0.38 6.23 2.30 0.72 0.16 0 0 0 0 0 0
60 0 0 0.44 11.1 4.74 1.90 0.16 0 0 0 0 0 0
55 0 0 0.49 17.6 8.70 2.50 0.33 0 0 0 0 0 0
50 0 0 0.55 24.7 14.2 4.62 0.68 0 0 0 0 0 0
45 0 0 0.60 32.0 23.9 6.96 0.87 0 0 0 0 0 0
40 0 0 0.66 49.3 33.4 11.6 0.87 0.10 0 0.18 0 0 0.18
35 0 0 0.71 65.2 42.9 23.0 1.80 0.39 0.10 0.49 0.10 0 0.56
30 0 0 0.77 81.6 64.5 36.6 3.70 0.86 0.76 0.74 0.40 0 1.30
25 0 0 0.82 102 90.4 52.7 5.96 1.90 1.70 0.90 0.67 0 3.26
20 0 0 0.88 126 137 75.3 10.9 4.10 2.60 2.00 1.30 0 7.68
15 0 0 0.93 155 169 95.6 22.5 6.13 7.68 5.81 2.20 0 17.2
10 0 0 0.99 196 205 120 39.9 11.7 12.5 11.7 4.50 0.10 42.8
5 0 0 26.4 246 280 200 75.5 21.7 30.8 23.9 9.07 0.56 108
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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 ng 7.38 6.67 4.34 2.24
0.95 1.05 33.5 18.3 15.9 11.4 6.86
0.90 1.11 45.2 28.8 24.7 18.5 11.9
0.80 1.25 65.2 48.4 41.3 32.4 22.4
0.50 2 132 120 104 87.0 67.0
0.20 5 272 266 241 210 173
0.10 10 399 387 364 319 269
0.04 25 602 560 552 485 415
0.02 50 786 700 713 626 536
0.01 100 1,000 846 892 778 667
0.005 200 1,250 998 1,090 943 806
0.002 500 1,640 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 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0
0.50 2 0 0 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
1929 April 8 3.28 102 1944 June 6 4.48 190
1930 May 19 4.23 160 1945 May 3 4.50 180
1931 April 9 3.12 99.0 1946 March 22 4.00 113
1932 April 18 4.90 202 1947 June 13 4.74 218
1933 April 18 3.52 112 1948 May 2 5.26 288
1934 April 12 1.14 11.0 1949 April 13 4.12 136
1935 Apirl 22 -- 47.0 1950 May 20 5.90 1,480
1936 April 25 -- 22.0 1951 April 30 4.90 250
1937 May 1 -- 180 1952 April 8 2.20 57.0
1938 June 3 3.42 60.0 1953 June 7 2.28 56.0
1942 April 5 -- 298 1954 June 17 3.70 124
1943 June 6 4.47 190 1955 April 24 4.76 211
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 May 20 5.90 1,480 1949 April 13 4.12 136
1942 April 5 -- 298 1954 June 17 3.70 124
1948 May 2 5.26 288 1946 March 22 4.00 113
1951 April 30 4.90 250 1933 April 18 3.52 112
1947 June 13 4.74 218 1929 April 8 3.28 102
1955 April 24 4.76 211 1931 April 9 3.12 99.0
1932 April 18 4.90 202 1938 June 3 3.42 60.0
1943 June 6 4.47 190 1952 April 8 2.20 57.0
1944 June 6 4.28 190 1953 June 7 2.28 56.0
1937 May 1 -- 180 1935 Apirl 22 -- 47.0
1945 May 3 4.50 180 1936 April 25 -- 22.0
1930 May 19 4.23 160 1934 April 12 1.14 11.0
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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
__________________________________________________________________________________________________________________________________
1929 -- -- -- -- -- -- 42.3 1.85 0.550 0.065 0 0 --
1930 0 0 0 0 0 0 30.1 71.7 4.33 2.70 0 0 9.15
1931 0 0 0 0 0 0.258 22.7 2.52 0.313 0.210 0 0 2.14
1932 0 0 0 0 0 0 89.8 27.4 0.337 0 0 0 9.71
1933 0 0 0 0 0 0 43.4 18.1 12.9 0.297 0 0 6.19
1934 0 0 0 0 0 0 2.83 0.081 0.157 0.277 0 0 0.276
1935 0 0 0 0 0 0 15.5 1.71 0.270 0.361 0 0 1.47
1936 0 0 0 0 0 0 7.57 5.65 0.193 0 0 0 1.12
1937 0 0 0 0 0 0 22.2 50.4 3.96 4.55 5.32 2.67 7.49
1938 0.935 0 0 0 0 6.19 1.81 30.4 31.4 1.00 0 0 6.00
1942 -- -- -- -- -- 28.1 245.3 180.2 42.1 0.610 3.82 39.8 --
1943 3.62 0.870 0 0 0 0 121.9 94.1 108.1 44.8 2.65 0.423 31.3
1944 0 0 0 0 0 0 21.5 1.08 82.7 24.1 8.22 5.28 11.8
1945 1.04 7.88 0.023 0 0 55.2 125.2 115.1 8.42 1.01 0.032 10.7 27.2
1946 9.71 1.90 0 0 0 33.3 65.5 8.68 0.483 0.135 0 0 9.98
1947 0.713 0.237 0 0 0 0 15.1 4.25 99.4 37.7 19.2 9.23 15.4
1948 16.4 6.13 0.945 0.084 0 0 126.8 235.6 84.0 29.3 9.72 0.793 42.6
1949 0 0.130 0 0 0 0 71.9 31.2 4.50 3.93 2.36 0 9.48
1950 4.74 5.92 0.239 0 0 0 61.7 714.5 296.9 174.9 34.0 28.8 111.2
1951 43.5 6.32 0.368 0 0 0 195.2 198.2 41.6 0.039 0.113 0.033 40.6
1952 0.168 0.007 0 0 0 0 13.8 0.223 0.107 0.013 0 0 1.17
1953 0 0 0 0 0 0 0.267 0.223 15.1 1.70 0.068 0 1.43
1954 0 0 0 0 0 0 33.2 47.2 51.3 2.32 0.561 0.993 11.3
1955 0.610 0.663 0.068 0 0 0 116.7 35.2 60.3 12.3 0.410 3.06 19.0
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U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:46:09 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05096500.html |
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