Maintainer: Webmaster
Last update: Wednesday, 23-Feb-2005 09:46:00 EST
Privacy || Disclaimer|| Accessibility || FOIA
URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05085000.html
----------------------------------------------------------------------------------------------------------
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 59.1 1983 0 1991 9.20 9.20 1.00 1.64
November 23.6 1983 0.971 1991 8.85 5.16 0.58 1.58
December 13.4 1983 0.291 1990 4.81 3.40 0.71 0.86
January 9.66 1983 0 m 2.41 2.49 1.03 0.43
February 17.3 1981 0 m 2.01 3.23 1.61 0.36
March 438 1966 0 1962 59.4 88.0 1.48 10.6
April 1,570 1950 21.9 1953 285 335 1.17 50.9
May 1,520 1950 10.6 1946 92.3 222 2.40 16.5
June 267 1964 4.21 1991 45.6 59.0 1.29 8.13
July 236 1982 1.87 1980 27.3 39.6 1.45 4.87
August 328 1993 0 1946 15.2 46.7 3.08 2.70
September 69.0 1993 0 m 8.65 12.2 1.41 1.54
Annual 268 1950 4.36 1990 47.2 45.4 0.96 100
__________________________________________________________________________________________________________
----------------------------------------------------------------------------------------------------------------------
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 3.54 11.2 5.61 1.40 0 0 0 1.80 0.34 0
90 0.13 0 0 14.7 13.6 7.45 2.90 0.51 0.09 0.78 2.50 0.54 0.29
85 0.25 0 0.08 21.7 15.6 9.67 4.29 0.99 0.39 1.70 3.00 0.86 0.68
80 0.39 0.08 0.24 25.5 17.4 11.9 5.08 1.90 0.54 2.70 3.50 1.10 1.00
75 0.48 0.11 0.34 29.9 18.8 13.6 5.94 1.90 1.30 3.86 4.10 1.70 1.60
70 0.59 0.24 0.48 35.5 20.1 15.0 6.55 2.93 1.80 4.69 4.80 1.70 2.92
65 0.59 0.31 0.68 41.5 21.3 16.4 7.82 3.52 2.50 5.14 5.70 2.20 3.88
60 0.73 0.41 0.96 49.5 22.6 17.8 9.55 4.08 3.76 5.86 5.70 2.80 4.40
55 0.91 0.41 0.96 58.4 24.7 19.3 10.8 4.62 4.71 6.19 6.77 3.50 5.99
50 1.10 0.70 1.90 72.2 27.2 21.4 14.0 5.87 5.17 6.51 7.37 3.50 6.90
45 1.40 0.91 1.90 89.3 31.7 24.0 14.4 6.77 6.24 7.61 8.19 4.49 8.93
40 1.70 0.91 3.87 111 37.8 27.3 16.2 7.57 6.95 8.52 8.80 4.96 10.8
35 2.10 1.20 4.71 145 44.6 30.8 18.1 8.31 7.67 9.44 9.58 5.62 13.2
30 2.70 1.50 8.93 188 52.2 35.0 20.7 9.05 8.65 10.7 10.1 6.13 16.4
25 3.30 2.00 17.2 240 62.4 40.3 23.7 11.3 9.67 12.4 12.0 7.14 19.7
20 4.44 2.60 35.6 310 80.5 47.3 29.5 12.9 11.8 13.8 13.0 7.64 26.6
15 5.44 3.40 84.9 435 101 59.1 37.4 15.3 14.4 15.3 14.9 9.13 39.1
10 6.37 4.70 164 671 143 77.8 51.8 19.2 18.1 17.8 16.5 10.7 66.5
5 7.84 6.27 359 1,230 282 151 84.3 29.2 26.6 23.5 19.6 12.8 166
______________________________________________________________________________________________________________________
--------------------------------------------------------------------------------------------------
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 39.5 26.9 23.5 17.7 14.2
0.95 1.05 104 71.6 58.9 44.1 32.6
0.90 1.11 172 119 94.9 70.5 50.3
0.80 1.25 313 217 167 123 84.3
0.50 2 939 657 479 337 222
0.20 5 2,680 1,880 1,310 870 564
0.10 10 4,530 3,200 2,190 1,390 909
0.04 25 7,830 5,550 3,730 2,270 1,500
0.02 50 11,000 7,840 5,220 3,070 2,060
0.01 100 15,000 10,700 7,030 4,010 2,730
0.005 200 19,700 14,000 9,210 5,090 3,520
0.002 500 27,300 ng ng ng ng
__________________________________________________________________________________________________
------------------------------------------------------------------------------------
Probability of occurrence of annual low discharges
__________________________________________________________________________________________
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 0 0 0 0 0 0 0.058 0.314 0.823
0.10 10 0 0 0 0 0 0.039 0.179 0.521 1.23
0.20 5 0 0 0 0 0 0.157 0.389 0.915 1.94
0.50 2 0.242 0.264 0.286 0.337 0.465 0.728 1.27 2.32 4.14
__________________________________________________________________________________________
-------------------------------------------------------------------------------------
Probability of occurrence of seasonal low discharges
___________________________________________________________________________________________
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 0 0 0 0 0 0 0 0.080
0.10 10 0 0 0 0 0 0 0 0.434
0.20 5 0 0 0 0.116 0 0.059 0.153 1.37
0.50 2 0.451 0.471 0.546 0.709 0.470 0.597 1.05 7.64
June-July-August September-October-November
_____________________________ _____________________________
0.05 20 0 0 0 0.140 0 0 0 0
0.10 10 0.026 0.097 0.315 0.529 0 0 0 0.234
0.20 5 0.544 0.940 1.12 1.68 0 0 0.237 0.886
0.50 2 2.44 3.18 3.97 6.59 1.81 2.98 13.50 4.03
___________________________________________________________________________________________
1Graphical interpretation.
-------------------------------------------------------------------------------------
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
11882 April -- 2,200 1968 March 27 2.31 315
11897 April -- 1,850 1969 April 12 7.67 3,960
11907 April -- 1,750 1970 April 9 7.04 2,220
11916 April -- 1,600 1971 April 10 5.84 2,460
1944 April 10 5.00 650 1972 March 17 5.96 2,120
1945 March 27 2.11 250 1973 June 19 1.93 208
1946 March 22 -- 1,000 1974 April 16 7.79 4,580
1947 March 25 4.12 1,100 1975 April 15 6.73 1,600
1948 April 19 11.80 11,500 1976 March 31 7.03 1,500
1949 April 7 8.19 2,020 1977 April 10 1.58 77.0
1950 April 18 11.80 16,600 1978 March 31 6.52 1,600
1951 April 5 3.60 900 1979 April 20 8.93 6,730
1952 April 2 2.78 370 1980 April 1 2.01 167
1953 June 4 3.53 910 1981 June 28 2.04 176
1954 June 16 2.61 391 1982 July 26 4.07 1,140
1955 April 2 8.56 4,200 1983 March 15 3.52 820
1956 April 21 6.63 2,930 1984 March 26 2.77 394
1957 March 23 2.72 461 1985 March 14 3.39 640
1958 June 10 2.72 463 1986 March 19 3.40 690
1959 April 2 2.45 338 1987 April 4 6.91 2,360
1960 April 6 5.60 2,050 1988 May 29 3.71 945
1961 March 22 1.90 147 1989 April 18 2.49 371
1962 April 19 6.68 2,400 1990 April 15 1.56 58.0
1963 March 24 2.54 250 1991 April 4 1.54 60.0
1964 June 21 4.31 1,460 1992 March 8 3.34 640
1965 April 12 7.48 3,710 1993 July 28 3.70 705
1966 March 21 7.82 3,100 1994 March 26 -- 533
1967 March 31 7.22 3,070
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 April 18 11.80 16,600 1972 March 17 5.96 2,120
1948 April 19 11.80 11,500 1960 April 6 5.60 2,050
1979 April 20 8.93 6,730 1949 April 7 8.19 2,020
1974 April 16 7.79 4,580 11897 April -- 1,850
1955 April 2 8.56 4,200 11907 April -- 1,750
1969 April 12 7.67 3,960 11916 April -- 1,600
1965 April 12 7.48 3,710 1975 April 15 6.73 1,600
1966 March 21 7.82 3,100 1978 March 31 6.52 1,600
1967 March 31 7.22 3,070 1976 March 31 7.03 1,500
1956 April 21 6.63 2,930 1964 June 21 4.31 1,460
1971 April 10 5.84 2,460 1982 July 26 4.07 1,140
1962 April 19 6.68 2,400 1947 March 25 4.12 1,100
1987 April 4 6.91 2,360 1946 March 22 -- 1,000
1970 April 9 7.04 2,220 1988 May 29 3.71 945
11882 April -- 2,200 1953 June 4 3.53 910
1951 April 5 3.60 900 1952 April 2 2.78 370
1983 March 15 3.52 820 1959 April 2 2.45 338
1993 July 28 3.70 705 1968 March 27 2.31 315
1986 March 19 3.40 690 1945 March 27 2.11 250
1944 April 10 5.00 650 1963 March 24 2.54 250
1985 March 14 3.39 640 1973 June 19 1.93 208
1992 March 8 3.34 640 1981 June 28 2.04 176
1994 March 26 -- 533 1980 April 1 2.01 167
1958 June 10 2.72 463 1961 March 22 1.90 147
1957 March 23 2.72 461 1977 April 10 1.58 77.0
1984 March 26 2.77 394 1991 April 4 1.54 60.0
1954 June 16 2.61 391 1990 April 15 1.56 58.0
1989 April 18 2.49 371
_____________________________________________________________________________________
1Determined by U.S. Army Corps of Engineers; not used in statistics.
---------------------------------------------------------------------------------------------------------------------------------
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
__________________________________________________________________________________________________________________________________
1944 -- -- -- -- -- -- 90.0 24.1 20.8 7.42 1.76 7.22 --
1945 2.44 14.7 11.2 2.55 1.64 89.6 47.3 20.1 15.2 5.59 2.90 0.987 18.0
1946 2.12 2.76 1.05 0.500 0.196 154.9 42.2 10.6 8.90 5.36 0 2.98 19.5
1947 5.07 5.83 2.74 0.497 0.021 90.0 96.7 17.2 15.5 19.6 5.37 3.65 21.9
1948 3.91 6.10 5.23 3.45 0.755 0.177 1,189 106.3 40.5 18.7 9.51 4.74 114.2
1949 4.05 7.01 3.68 1.14 0.500 0.594 482.5 37.5 17.4 11.2 3.30 0.653 47.0
1950 5.61 6.97 5.00 0.700 0.700 0.797 1,573 1,515 54.1 28.3 8.05 8.93 267.9
1951 8.41 9.24 4.58 3.65 4.50 31.2 198.7 27.4 15.5 6.48 9.32 8.42 27.1
1952 6.38 6.71 4.10 1.10 0.686 3.57 96.0 16.4 7.57 29.1 5.35 3.01 14.9
1953 2.21 4.19 1.97 0.574 0.079 2.98 21.9 16.5 51.4 10.1 2.14 0.270 9.50
1954 1.80 4.57 2.42 0.281 0.232 24.7 39.8 18.3 43.8 10.0 11.1 6.43 13.6
1955 7.01 6.57 4.00 1.31 0.514 0.032 291.1 22.1 92.4 11.2 2.85 1.69 36.3
1956 5.16 5.31 1.96 0.526 0.476 0.584 511.3 87.9 208.8 26.7 11.0 14.0 72.0
1957 9.96 15.8 6.44 4.47 1.53 47.1 25.8 20.4 14.9 6.45 7.78 56.6 18.1
1958 12.8 14.2 6.85 2.62 0.843 6.00 24.9 16.3 40.9 12.8 3.80 2.07 12.0
1959 7.73 6.53 0.710 0.268 0.100 10.8 107.2 18.4 11.0 5.71 2.15 0.440 14.2
1960 5.57 4.57 3.71 1.87 0.986 20.6 605.9 30.7 15.2 4.63 1.90 0.937 57.3
1961 1.62 4.11 0.742 0.635 0 23.4 24.4 11.6 5.18 5.64 0.513 0 6.51
1962 2.48 3.35 1.06 0.190 0 0 398.4 63.2 266.5 20.2 11.8 8.21 64.0
1963 13.2 15.8 4.87 0.945 0 42.2 34.5 18.9 22.7 26.5 3.73 0.797 15.4
1964 3.15 5.35 1.13 0.152 0.093 0.261 138.7 28.0 266.6 50.5 12.1 10.4 42.6
1965 12.6 10.1 4.99 3.79 2.77 2.84 481.4 63.0 71.9 23.4 11.5 16.0 58.2
1966 25.8 15.8 11.6 4.96 2.14 438.2 355.8 228.5 57.3 36.5 17.6 9.88 101.1
1967 10.9 10.8 8.15 3.54 2.48 123.9 358.8 210.7 39.4 17.4 8.90 5.71 66.8
1968 4.76 10.3 5.57 2.02 1.55 66.5 46.0 21.3 18.7 16.6 11.8 10.5 18.0
1969 8.91 10.9 5.61 0.822 0.407 0.456 521.5 53.3 20.2 12.3 4.70 5.14 53.2
1970 6.50 7.93 5.99 5.38 2.26 0.794 479.5 139.5 41.9 39.8 11.4 6.53 62.0
1971 9.14 10.8 4.40 0.896 0.947 7.45 512.3 59.5 30.4 67.1 21.0 11.6 60.9
1972 12.3 14.6 5.64 0.801 0.259 269.8 356.3 71.9 31.2 10.0 4.51 4.42 65.1
1973 8.08 7.82 2.04 0.400 0.526 59.5 39.9 18.9 28.4 6.15 1.47 4.46 14.9
1974 11.7 4.40 3.09 2.55 0.587 0.913 660.7 485.7 176.3 27.5 19.6 7.60 116.6
1975 13.3 14.8 8.46 5.86 3.68 5.45 285.2 162.4 28.9 108.5 9.28 6.54 54.5
1976 11.1 9.54 3.75 3.60 4.14 108.1 387.6 34.6 17.5 8.50 2.90 1.53 49.1
1977 1.40 2.19 0.489 0 0 11.0 32.9 17.7 10.9 6.79 3.14 4.16 7.57
1978 9.04 5.10 1.29 0.958 0.168 74.5 495.4 56.4 61.2 26.4 8.17 8.64 61.9
1979 5.48 3.07 2.12 2.00 1.35 1.00 1,189 363.0 63.6 63.4 12.1 17.2 142.9
1980 8.14 8.25 4.35 1.04 1.33 8.16 70.2 12.6 7.33 1.87 1.32 2.98 10.6
1981 5.34 10.4 8.19 4.10 17.3 33.3 38.8 15.2 21.5 12.3 4.83 15.3 15.5
1982 20.5 11.7 8.35 1.54 0.301 33.6 329.2 63.0 60.0 235.8 96.4 13.9 73.1
1983 59.1 23.6 13.4 9.66 12.5 236.9 197.3 52.5 32.6 18.7 7.92 17.1 57.0
1984 9.15 15.0 3.53 0.784 4.48 53.3 89.0 26.7 26.0 9.92 3.13 3.77 20.3
1985 3.94 3.60 1.56 0.121 0.001 175.4 63.7 31.2 26.5 5.25 6.08 8.53 27.4
1986 18.5 21.3 8.60 6.37 5.09 190.0 113.1 86.2 16.2 60.1 21.0 12.5 47.0
1987 20.1 10.9 8.71 9.65 7.31 122.3 848.6 81.9 28.6 27.3 15.0 7.68 98.4
1988 12.1 11.1 11.4 6.32 0.674 40.0 98.7 70.7 30.0 4.73 2.11 0.253 24.0
1989 5.20 3.20 1.10 1.14 1.10 1.00 90.6 30.9 8.74 2.32 0.150 0.011 12.1
1990 1.18 1.73 0.291 0 0 0.600 26.4 11.2 8.28 2.75 0.019 0 4.36
1991 0 0.971 0.831 0 0 2.87 23.0 14.0 4.21 14.5 6.44 12.3 6.61
1992 11.5 10.3 8.67 7.14 5.98 186.7 60.7 24.0 15.0 6.80 3.49 0.635 28.6
1993 2.71 5.38 3.61 1.58 2.74 13.1 97.6 23.7 21.8 132.6 327.6 69.0 59.0
1994 20.7 17.2 11.1 6.19 4.56 153.1 164.7 52.5 86.3 64.8 13.7 14.9 51.0
__________________________________________________________________________________________________________________________________
|
U.S. Department of the Interior ||
U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:46:00 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05085000.html |
|