Maintainer: Webmaster
Last update: Tuesday, 24-Aug-2004 12:38:25 EDT
Privacy || Disclaimer|| Accessibility || FOIA
URL: http://nd.water.usgs.gov/pubs/ofr/ofr00344/htdocs/ff.05058700.html
----------------------------------------------------------------------------------------------------------
Statistics of monthly and annual mean discharges
__________________________________________________________________________________________________________
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 716 1995 7.66 1957 66.5 112 1.69 2.79
November 454 1995 12.2 1991 77.6 78.1 1.01 3.26
December 290 1995 8.69 1991 74.2 62.4 0.84 3.12
January 204 1995 8.15 1991 68.8 50.0 0.73 2.89
February 413 1996 10.7 1991 86.2 77.2 0.90 3.62
March 1,520 1995 19.8 1964 334 373 1.12 14.0
April 4,180 1997 20.3 1991 795 912 1.15 33.4
May 2,390 1997 17.5 1959 357 518 1.45 15.0
June 555 1974 14.8 1961 174 147 0.85 7.31
July 1,420 1993 6.07 1973 170 265 1.56 7.14
August 1,940 1993 6.54 1961 109 304 2.78 4.59
September 561 1994 5.25 1959 68.5 111 1.62 2.87
Annual 719 1997 25.9 1991 198 171 0.86 100
-----------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------
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 14.2 14.8 20.0 21.4 17.5 15.0 6.01 5.46 7.01 7.73 14.8 12.7 10.5
90 16.0 16.8 27.4 30.0 22.0 21.0 10.5 7.91 10.1 11.3 18.5 16.6 15.4
85 20.4 19.2 43.4 39.3 25.6 26.9 15.1 10.3 12.3 14.4 21.3 21.6 18.5
80 24.4 24.5 51.6 54.0 32.5 34.4 18.2 12.5 14.1 16.3 24.1 27.6 22.2
75 29.0 33.3 64.8 69.9 41.4 41.0 21.1 14.7 16.4 18.3 27.2 34.2 26.4
70 34.4 39.9 75.9 93.7 51.9 48.9 24.2 16.6 18.5 20.4 30.7 37.8 30.8
65 39.0 43.1 86.0 122 62.9 57.3 27.6 18.6 20.6 22.6 34.7 41.4 37.1
60 44.1 48.3 99.0 167 85.7 66.5 33.4 20.7 22.7 24.8 38.9 44.9 43.4
55 48.2 54.6 118 261 121 76.5 41.5 22.8 24.9 27.0 43.8 48.4 51.2
50 51.8 61.4 138 360 148 87.7 50.6 25.6 27.5 30.4 49.4 52.4 59.4
45 58.2 67.7 162 445 177 104 59.8 29.3 30.8 33.9 54.6 56.4 67.7
40 65.7 73.8 201 540 214 127 77.1 34.7 34.7 37.3 60.7 61.8 83.9
35 72.7 87.0 241 687 258 158 97.8 44.8 39.9 46.7 68.2 68.1 100
30 83.9 96.1 282 860 312 186 138 57.3 47.0 58.3 81.1 81.2 125
25 100 110 334 1,070 406 222 169 74.1 56.3 71.9 99.1 100 150
20 116 130 411 1,300 497 268 217 102 68.9 88.2 112 117 203
15 128 155 536 1,680 630 335 282 146 88.8 107 139 135 283
10 143 191 963 2,230 831 436 398 223 156 142 158 159 430
5 186 248 1,500 3,580 1,190 574 598 342 298 198 240 219 845
----------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------
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 1.01 130 85.9 49.2 30.4 22.8
0.95 1.05 281 201 134 90.7 67.5
0.90 1.11 415 310 222 156 116
0.80 1.25 652 511 394 291 217
0.50 2 1,460 1,250 1,080 860 653
0.20 5 3,040 2,810 2,600 2,220 1,740
0.10 10 4,340 4,150 3,940 3,460 2,770
0.04 25 6,200 16,100 5,940 5,340 4,400
0.02 50 7,710 17,670 7,600 6,940 5,830
0.01 100 9,320 19,240 19,200 8,660 7,410
0.005 200 11,000 110,900 110,800 10,500 9,150
0.002 500 13,400 ng ng ng ng
------------------------------------------------------------------------------------------------------------
1Statistical adjustment based on correlation between 3-, 7-, 15-,
and 30-consecutive-day periods.
-------------------------------------------------------------------------------------
Annual peak discharge and corresponding gage height, period of record
[--, 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
1957 September 7 5.20 612 1978 March 23 11.73 1,410
1958 April 7 -- 490 1979 May 2 17.58 4,880
1959 June 29 4.28 451 1980 March 23 7.01 760
1960 April 11 9.81 1,980 1981 April 5 4.30 460
1961 March 6 4.61 482 1982 April 13 11.44 2,600
1962 July 7 10.55 2,210 1983 March 17 13.75 2,370
1963 June 8 3.02 207 1984 April 6 9.79 2,000
1964 June 30 4.96 634 1985 May 19 5.13 642
1965 April 14 16.02 3,630 1986 April 21 10.75 2,110
1966 March 30 16.23 4,260 1987 March 23 14.07 3,000
1967 April 15 8.52 1,580 1988 March 26 3.63 284
1968 June 16 7.63 1,300 1989 April 4 8.36 1,000
1969 April 24 16.54 4,380 1990 June 4 3.74 311
1970 May 29 8.70 1,500 1991 July 2 3.49 261
1971 April 28 9.67 1,850 1992 March 11 9.18 1,500
1972 March 16 10.33 1,450 1993 August 2 16.34 3,790
1973 March 17 5.29 677 1994 April 5 10.70 1,980
1974 April 25 10.25 2,020 1995 April 6 15.46 4,090
1975 July 1 19.04 5,270 1996 April 26 -- 5,060
1976 April 13 6.29 984 1997 April 23 -- 5,670
1977 May 5 7.35 1,230
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 23 -- 5,670 1992 March 11 9.18 1,500
1975 July 1 19.04 5,270 1972 March 16 10.33 1,450
1996 April 26 -- 5,060 1978 March 23 11.73 1,410
1979 May 2 17.58 4,880 1968 June 16 7.63 1,300
1969 April 24 16.54 4,380 1977 May 5 7.35 1,230
1966 March 30 16.23 4,260 1989 April 4 8.36 1,000
1995 April 6 15.46 4,090 1976 April 13 6.29 984
1993 August 2 16.34 3,790 1980 March 23 7.01 760
1965 April 14 16.02 3,630 1973 March 17 5.29 677
1987 March 23 14.07 3,000 1985 May 19 5.13 642
1982 April 13 11.44 2,600 1964 June 30 4.96 634
1983 March 17 13.75 2,370 1957 September 7 5.20 612
1962 July 7 10.55 2,210 1958 April 7 -- 490
1986 April 21 10.75 2,110 1961 March 6 4.61 482
1974 April 25 10.25 2,020 1981 April 5 4.30 460
1984 April 6 9.79 2,000 1959 June 29 4.28 451
1960 April 11 9.81 1,980 1990 June 4 3.74 311
1994 April 5 10.70 1,980 1988 March 26 3.63 284
1971 April 28 9.67 1,850 1991 July 2 3.49 261
1967 April 15 8.52 1,580 1963 June 8 3.02 207
1970 May 29 8.70 1,500
---------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------
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
__________________________________________________________________________________________________________________________________
1957 7.66 34.5 49.1 50.6 49.8 68.2 43.1 39.9 65.2 51.5 49.3 323.1 69.0
1958 109.4 133.9 80.9 70.7 95.6 116.0 98.8 38.4 27.6 72.3 17.2 12.9 72.7
1959 21.1 31.5 36.5 36.0 33.5 48.4 33.2 17.5 40.1 27.7 10.7 5.25 28.4
1960 16.0 12.7 26.0 19.5 21.9 175.3 838.4 100.0 171.8 35.7 21.0 13.9 120.1
1961 15.3 26.1 46.1 43.0 39.4 108.3 29.0 22.1 14.8 8.60 6.54 18.7 31.5
1962 21.1 18.5 13.0 13.2 14.8 246.6 469.4 210.6 277.4 657.0 91.6 39.9 173.8
1963 31.3 54.6 58.2 49.5 52.0 68.1 63.8 34.9 41.5 17.4 13.1 12.2 41.3
1964 11.7 25.9 36.6 25.8 26.2 19.8 78.9 30.4 159.2 203.4 22.9 33.7 56.2
1965 26.5 53.9 50.8 46.9 42.1 125.9 1,634 306.9 163.2 210.6 185.0 66.8 241.8
1966 120.5 97.9 105.8 103.7 76.8 1,304 991.4 358.9 217.9 149.0 219.6 71.9 319.8
1967 35.7 44.5 73.5 67.6 129.6 345.1 958.9 634.2 103.5 33.5 17.7 16.1 204.8
1968 18.3 29.1 42.6 37.4 41.3 128.1 168.3 163.5 329.2 47.7 17.5 21.8 86.8
1969 22.4 53.9 50.1 41.7 202.3 220.2 2,548 442.9 140.4 213.3 21.5 25.9 329.0
1970 22.1 47.5 58.5 65.5 100.9 231.1 523.1 401.7 446.5 68.2 17.7 17.2 166.2
1971 16.5 29.7 42.2 39.6 79.1 356.5 732.5 222.4 244.3 228.8 30.4 22.4 170.2
1972 56.6 106.6 158.6 138.2 78.6 363.5 927.8 289.4 235.5 39.8 24.9 19.2 202.6
1973 23.9 42.3 48.5 53.5 70.4 165.0 62.2 27.2 21.7 6.07 11.6 25.0 46.3
1974 22.4 32.8 34.7 63.7 177.9 283.8 1,006 685.7 555.4 20.1 16.6 10.1 241.2
1975 14.5 38.7 53.2 54.8 56.2 81.6 736.6 970.5 512.9 700.2 95.3 27.1 279.7
1976 38.1 62.7 92.7 93.7 107.0 169.3 601.5 172.3 51.6 21.3 10.7 29.9 120.3
1977 43.6 30.5 19.8 19.7 17.0 51.9 36.9 67.7 19.7 18.5 7.44 24.6 29.9
1978 23.9 40.6 48.3 55.3 98.8 426.8 806.5 180.5 79.2 42.2 22.2 61.5 156.7
1979 57.7 54.6 24.5 31.1 56.5 225.0 1,788 1,989 207.4 151.7 74.3 37.9 392.8
1980 73.7 180.4 22.7 15.9 15.9 209.4 246.9 18.9 34.8 28.4 15.8 158.9 84.7
1981 126.2 113.9 39.3 15.8 29.1 83.6 152.7 65.2 113.1 127.4 29.1 26.4 76.9
1982 140.6 167.6 18.2 14.0 15.6 189.9 1,244 297.5 171.3 184.6 72.7 13.7 210.4
1983 134.9 195.1 122.5 126.9 76.4 1,214 788.5 208.7 267.9 218.4 20.9 88.6 289.8
1984 106.9 137.3 136.3 109.4 76.0 415.7 1,092 382.0 109.8 35.0 16.4 32.5 220.2
1985 95.5 56.5 53.2 40.7 29.0 158.0 171.6 141.7 81.4 22.2 40.2 25.1 76.6
1986 36.2 100.2 143.0 139.9 193.7 354.3 509.8 490.0 81.8 72.4 90.2 34.0 187.1
1987 35.3 98.8 190.2 132.1 74.4 1,328 1,624 200.8 148.8 127.9 262.9 61.8 358.1
1988 89.8 102.4 112.7 118.3 139.4 145.6 38.0 54.1 34.6 6.52 18.2 13.5 72.7
1989 14.9 28.2 34.0 36.3 46.3 207.5 380.5 31.8 46.1 19.3 27.1 27.1 74.7
1990 32.5 27.4 17.5 21.5 16.8 30.9 28.7 18.6 60.3 20.8 23.9 55.8 29.5
1991 16.8 12.2 8.69 8.15 10.7 34.3 20.3 51.2 39.2 56.9 27.5 23.1 25.9
1992 15.9 24.2 60.6 70.1 63.6 585.1 134.4 70.6 56.1 97.1 46.1 52.2 107.0
1993 25.4 23.1 31.0 80.0 102.5 325.1 444.2 158.3 249.4 1424 1945 377.9 436.6
1994 150.3 147.3 190.7 125.7 202.1 565.5 988.3 304.4 354.8 624.4 276.0 560.8 374.1
1995 715.9 453.9 289.8 203.9 166.8 1,525 2,540 907.6 326.6 273.8 275.6 205.1 658.6
1996 92.8 70.6 108.9 151.5 412.8 729.2 2,848 1,439 393.8 232.9 156.8 33.8 553.6
1997 45.8 140.4 211.8 190.3 195.7 250.6 4,181 2,394 439.1 378.2 129.1 79.4 718.6
---------------------------------------------------------------------------------------------------------------------------
|
U.S. Department of the Interior ||
U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 24-Aug-2004 12:38:25 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr00344/htdocs/ff.05058700.html |
|