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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 30.9 1917 0 m 3.29 6.58 2.00 0.60
November 41.3 1958 0 m 3.82 8.15 2.13 0.69
December 4.47 1958 0 m 0.94 1.26 1.34 0.17
January 3.80 1917 0 m 0.39 0.83 2.14 0.07
February 11.0 1958 0 m 0.63 1.87 2.94 0.12
March 435 1946 0.039 1934 76.6 110 1.43 13.9
April 1,770 1952 1.33 1931 237 369 1.56 43.0
May 571 1942 0.129 1934 74.6 124 1.67 13.5
June 524 1942 0.090 1934 74.7 127 1.69 13.6
July 821 1916 0 m 63.3 153 2.42 11.5
August 108 1916 0 m 10.1 22.2 2.19 1.84
September 44.1 1916 0 m 5.83 11.2 1.92 1.06
Annual 176 1952 0.192 1934 45.9 46.9 1.02 100
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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 1.80 0.58 0.10 0 0 0 0 0 0 0
90 0 0 0 3.70 1.00 0.32 0 0 0 0 0 0 0
85 0 0 0 5.14 2.50 1.00 0.10 0 0 0 0 0 0
80 0 0 0 7.76 3.41 1.40 0.32 0 0 0 0 0 0
75 0 0 0 12.2 4.30 2.40 1.00 0.09 0 0 0 0 0
70 0 0 0 18.2 6.69 3.53 1.90 0.16 0 0 0 0 0
65 0 0 0.08 24.3 8.80 4.42 2.50 0.30 0.04 0 0 0 0.17
60 0 0 0.78 32.3 11.2 5.93 3.77 0.55 0.19 0 0.09 0 0.38
55 0 0 1.10 41.8 14.0 7.35 4.36 1.00 0.26 0.08 0.26 0 0.84
50 0 0 3.17 48.9 17.9 9.10 5.40 1.90 0.47 0.10 0.59 0.10 1.30
45 0 0 5.01 57.4 21.6 12.8 8.19 1.90 1.10 0.47 1.10 0.18 1.90
40 0 0 10.5 73.5 25.3 21.3 13.4 2.60 1.50 1.00 1.70 0.49 3.28
35 0 0.03 16.9 98.6 33.1 31.5 18.9 4.08 2.10 1.50 1.70 0.68 4.88
30 0.10 0.09 20.8 141 50.6 48.1 27.4 5.23 2.80 1.80 2.50 0.95 7.52
25 0.36 0.36 34.1 215 71.9 68.8 38.4 6.96 3.87 2.70 3.10 1.30 12.5
20 0.68 0.45 48.6 314 94.0 92.8 52.6 9.78 5.29 3.30 3.90 1.80 22.0
15 0.88 0.87 93.3 446 119 133 72.1 15.1 9.19 5.23 5.62 2.10 41.1
10 1.30 0.87 171 593 186 198 106 23.8 18.1 10.5 8.01 2.50 78.7
5 2.20 1.70 380 1,130 332 328 247 50.3 36.5 20.0 24.2 3.50 206
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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 ng 7.17 4.43 2.62 1.70
0.95 1.05 77.4 35.8 23.6 14.5 9.19
0.90 1.11 136 76.2 52.0 32.4 20.4
0.80 1.25 260 174 123 78.2 49.1
0.50 2 817 649 493 320 202
0.20 5 2,270 1,760 1,420 935 606
0.10 10 3,700 2,640 2,200 1,450 957
0.04 25 6,010 3,780 3,230 2,140 1,440
0.02 50 8,080 4,570 3,980 2,640 1,800
0.01 100 10,400 5,310 4,690 3,100 2,140
0.005 200 13,000 5,970 5,340 3,530 2,470
0.002 500 16,800 ng ng ng ng
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Probability of annual low discharges
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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 0 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0 0
0.50 2 0 0 0 0 0 0 0 0.196 0.361
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Probability of seasonal low discharges
_____________________________________________________________________________________
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 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0.120
0.20 5 0 0 0 0 0 0 0 0.762
0.50 2 0 0 0 0 0 0 0.355 7.43
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 0.139 0 0 0 0
0.50 2 0.314 0.422 0.468 1.43 0 0 0 0.062
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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)
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Annual peak discharge, by year, and corresponding gage height
1916 -- 17.40 2,980 1946 March 21 14.56 2,460
1917 April 1 14.73 2,250 1947 April 13 14.68 2,710
1918 -- -- -- 1948 April 1 -- 2,080
1919 June 5 7.37 559 1949 July 12 12.98 1,770
1920 May 11 9.50 970 1950 May 11 -- 1,690
1921 April 2 5.50 287 1951 April 8 -- 3,180
1922 March 22 13.08 1,330 1952 April 10 16.56 7,320
1923 April 15 -- 746 1953 March 26 -- 572
1924 April 5 2.65 45.0 1954 June 9 6.61 393
1931 June 10 1.80 41.0 1955 July 13 5.58 484
1932 April 8 4.50 300 1956 May 29 -- 655
1933 March 2 4.84 78.0 1957 April 21 10.68 1,610
1934 April 10 1.36 9.10 1958 April 8 6.84 690
1935 March 17 -- 120 1985 May 31 9.37 1,190
1936 March 23 10.51 354 1986 March 29 18.91 5,500
1937 May 1 -- 400 1987 June 1 4.78 275
1938 July 4 6.42 267 1988 May1 -- 250
1939 March 25 13.62 1,420 1989 March 29 20.01 5,400
1940 April 2 8.08 349 1990 April 4 3.83 130
1941 June 23 -- 240 1991 July 2 11.22 1,420
1942 May 17 14.08 1,480 1992 March 7 5.45 220
1943 April 4 -- 1,940 1993 March 30 18.07 4,400
1944 June 6 13.29 1,520 1994 March 25 16.95 4,310
1945 March 16 -- 892
Annual peak discharge, from highest to lowest, and corresponding gage height
1952 April 10 16.56 7,320 1922 March 22 13.08 1,330
1986 March 29 18.91 5,500 1985 May 31 9.37 1,190
1989 March 29 20.01 5,400 1920 May 11 9.50 970
1993 March 30 18.07 4,400 1945 March 16 -- 892
1994 March 25 16.95 4,310 1923 April 15 -- 746
1951 April 8 -- 3,180 1958 April 8 6.84 690
1916 -- 17.40 2,980 1956 May 29 -- 655
1947 April 13 14.68 2,710 1953 March 26 -- 572
1946 March 21 14.56 2,460 1919 June 5 7.37 559
1917 April 1 14.73 2,250 1955 July 13 5.58 484
1948 April 1 -- 2,080 1937 May 1 -- 400
1943 April 4 -- 1,940 1954 June 9 6.61 393
1949 July 12 12.98 1,770 1936 March 23 10.51 354
1950 May 11 -- 1,690 1940 April 2 8.08 349
1957 April 21 10.68 1,610 1932 April 8 4.50 300
1944 June 6 13.29 1,520 1921 April 2 5.50 287
1942 May 17 14.08 1,480 1987 June 1 4.78 275
1939 March 25 13.62 1,420 1938 July 4 6.42 267
1991 July 2 11.22 1,420 1988 May1 -- 250
1941 June 23 -- 240 1933 March 2 4.84 78.0
1992 March 7 5.45 220 1924 April 5 2.65 45.0
1990 April 4 3.83 130 1931 June 10 1.80 41.0
1935 March 17 -- 120 1934 April 10 1.36 9.10
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1Day of month unknown.
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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]
__________________________________________________________________________________________________________________________________
Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
__________________________________________________________________________________________________________________________________
1916 4.80 4.00 2.40 2.40 1.80 37.0 663.0 107.0 201.7 820.8 108.3 44.1 166.7
1917 30.9 26.1 2.90 3.80 2.50 261.0 642.6 159.2 17.7 3.13 1.84 2.00 96.1
1919 0.600 0.900 0.600 0.700 0.500 16.0 50.0 20.0 122.3 31.0 5.28 0.910 20.6
1920 1.89 1.80 0.900 1.40 1.00 118.3 33.2 83.2 110.7 92.9 6.29 2.12 38.0
1921 1.67 2.86 1.65 1.00 1.07 4.48 59.5 16.1 4.00 3.03 0.710 4.14 8.31
1922 1.87 1.40 1.00 0.700 0.500 380.6 273.5 26.3 3.85 0.639 0.065 0.097 57.9
1923 0.080 0.060 0.050 0.040 0.030 0.040 197.7 5.90 3.98 2.87 0.092 0.009 17.4
1924 0.126 0.380 0.200 0.100 0.100 1.00 12.9 2.85 1.96 1.24 0.226 1.51 1.87
1931 0 0 0 0 0 2.60 1.33 0.642 3.51 1.36 1.95 4.17 1.30
1932 0 0 0 0 0.259 4.10 25.7 2.68 0.890 .071 0 0 2.78
1933 0 0 0 0 0.675 14.3 5.54 4.28 2.30 0.032 0 0 2.28
1934 0 0 0 0 0 0.039 2.07 0.129 0.090 0 0 0 0.192
1935 0 0 0 0 0.100 42.6 5.47 10.5 13.9 16.0 0.439 0 7.50
1936 0 0 0 0 0 55.9 22.0 5.08 0.610 0 0 0 7.02
1937 0 0 0 0 0 13.0 172.4 66.3 6.48 15.5 2.46 0.100 23.0
1938 0 0 0 0 0.536 46.9 5.65 12.4 12.2 49.7 0.194 13.9 11.9
1939 0 0 0 0.029 0 213.9 28.1 3.82 4.61 3.73 0.445 0 21.5
1940 0 0 0 0 0 0.839 103.6 11.1 0.423 0 0 0 9.54
1941 0 0 0 0 0 35.6 55.7 4.65 28.0 1.94 11.8 32.2 14.1
1942 9.11 3.83 4.11 0 0 7.52 24.2 571.0 523.6 25.7 13.5 38.6 102.1
1943 14.5 13.9 1.28 0 0 43.0 742.7 81.3 266.3 88.5 44.3 12.3 108.3
1944 4.44 7.31 2.40 0 0 5.36 45.3 135.1 500.3 60.4 7.14 4.32 63.9
1945 2.85 5.84 2.08 0 0 192.8 76.8 24.0 52.6 3.98 0.632 0 30.3
1946 0.094 0.267 0 0 0 435.3 126.2 15.1 3.48 63.4 2.21 1.86 54.7
1947 10.8 7.11 1.73 0.097 0.275 107.1 977.5 185.7 106.1 17.4 0.558 0 117.1
1948 0 0.463 0.306 0 0 250.7 579.2 53.2 12.3 18.1 3.72 0.187 76.2
1949 0.110 0.370 0.045 0 0 72.7 44.3 2.85 6.82 429.7 16.0 1.50 48.6
1950 2.65 3.91 0.432 0 0 68.5 498.4 470.7 74.4 256.2 14.8 1.04 116.6
1951 2.42 1.47 0.181 0.010 0.393 0.065 673.3 117.0 82.7 43.7 5.25 1.96 76.8
1952 4.70 6.81 3.54 2.03 1.27 1.38 1,767 224.8 50.3 69.0 7.97 4.68 176.5
1953 0.261 0.433 1.09 0.739 0.821 153.8 73.1 42.1 92.8 35.7 1.34 0 33.7
1954 0.006 0.743 0.229 0 0 17.1 43.6 26.3 91.1 9.16 5.86 5.73 16.6
1955 2.84 3.54 0.806 0.039 0 16.7 61.0 3.49 18.3 68.7 3.72 0.570 15.0
1956 0.177 0.007 0 0 0 0.058 143.1 70.7 40.2 6.82 75.3 4.50 28.3
1957 0.481 2.89 1.49 0.100 0 33.7 169.0 98.8 221.4 34.5 20.4 25.0 50.5
1958 20.9 41.3 4.47 0.729 11.0 103.7 123.9 21.0 7.20 4.01 1.55 2.20 28.5
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U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 31-Aug-2004 10:28:22 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr97416/htdocs/f.05049000.html |
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