Maintainer: Webmaster
Last update: Wednesday, 23-Feb-2005 09:46:05 EST
Privacy || Disclaimer|| Accessibility || FOIA
URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05092000.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 4,460 1972 13.8 1937 1,700 1,270 0.75 3.89
November 5,650 1972 277 1977 1,460 1,010 0.69 3.36
December 3,070 1972 149 1977 1,180 713 0.61 2.69
January 2,060 1966 174 1990 1,040 584 0.56 2.37
February 1,880 1952 201 1977 1,010 534 0.53 2.32
March 9,330 1983 280 1962 2,620 2,380 0.91 6.01
April 38,400 1966 1,280 1981 13,200 9,460 0.72 30.2
May 58,900 1950 938 1977 7,900 9,630 1.22 18.1
June 23,400 1962 399 1936 5,010 4,170 0.83 11.5
July 28,200 1975 118 1936 4,410 4,650 1.05 10.1
August 21,600 1993 50.1 1936 2,350 3,210 1.37 5.39
September 7,910 1993 27.4 1936 1,790 1,480 0.82 4.11
Annual 10,500 1950 536 1977 3,740 2,190 0.59 100
__________________________________________________________________________________________________________
----------------------------------------------------------------------------------------------------------------------
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
_____________________________________________________________________________________________________________________________________
95 195 222 354 1,110 1,120 747 420 239 264 304 343 224 330
90 267 316 466 1,560 1,470 1,100 666 397 462 379 428 298 455
85 346 379 563 2,040 1,700 1,430 1,080 548 542 461 498 375 578
80 421 446 650 2,430 2,070 1,730 1,420 752 650 544 588 472 726
75 496 522 790 2,890 2,400 1,960 1,720 909 774 688 667 550 871
70 583 573 948 3,540 2,700 2,200 1,980 1,000 892 789 743 662 1,030
65 709 671 1,110 4,360 3,020 2,470 2,260 1,100 993 881 813 757 1,200
60 771 761 1,260 5,280 3,330 2,800 2,530 1,230 1,100 966 894 821 1,360
55 840 861 1,390 6,350 3,620 3,200 2,780 1,370 1,210 1,090 1,030 912 1,510
50 1,030 1,040 1,500 7,820 4,030 3,550 3,040 1,520 1,320 1,270 1,230 1,080 1,670
45 1,190 1,140 1,610 9,980 4,530 3,930 3,350 1,680 1,490 1,440 1,400 1,210 1,870
40 1,320 1,260 1,750 12,300 5,090 4,360 3,680 1,910 1,680 1,620 1,570 1,360 2,080
35 1,380 1,400 1,890 14,900 6,200 4,830 4,060 2,140 1,930 1,810 1,740 1,510 2,340
30 1,440 1,440 2,030 17,700 7,460 5,410 4,470 2,380 2,110 2,020 1,900 1,630 2,740
25 1,540 1,480 2,190 20,500 8,890 6,220 4,990 2,640 2,280 2,300 2,050 1,730 3,280
20 1,610 1,550 2,480 23,000 10,900 7,200 5,690 2,910 2,500 2,720 2,190 1,850 4,090
15 1,680 1,620 3,370 25,900 13,900 8,680 6,700 3,380 2,810 3,250 2,390 1,990 5,390
10 1,810 1,720 6,420 29,900 18,000 10,800 8,780 4,170 3,430 3,800 2,690 2,170 8,280
5 1,990 1,830 11,600 40,400 26,400 14,500 13,700 6,630 5,030 4,500 3,300 2,440 16,000
_____________________________________________________________________________________________________________________________________
--------------------------------------------------------------------------------------------------
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 2,830 2,450 2,230 1,790 1,360
0.95 1.05 5,580 5,050 4,640 3,770 2,850
0.90 1.11 7,810 7,220 6,680 5,460 4,130
0.80 1.25 11,500 10,900 10,100 8,370 6,340
0.50 2 22,400 22,000 20,700 17,600 13,600
0.20 5 40,100 40,500 38,700 34,000 26,900
0.10 10 52,600 53,800 51,700 46,400 37,300
0.04 25 68,700 71,000 68,700 63,000 51,700
0.02 50 80,600 83,800 81,400 75,800 63,200
0.01 100 92,300 96,400 93,900 88,700 75,000
0.005 200 104,000 109,000 106,000 102,000 87,200
0.002 500 119,000 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 20 136 138 147 155 178 212 235 260 312
0.10 10 194 198 209 222 252 294 322 354 419
0.20 5 290 296 314 333 372 425 461 501 589
0.50 2 577 593 626 666 724 800 855 913 1,070
____________________________________________________________________________________
-------------------------------------------------------------------------------------
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 20 169 174 180 196 268 281 305 436
0.10 10 248 257 265 285 363 383 417 576
0.20 5 379 394 408 431 512 541 594 807
0.50 2 759 793 820 849 916 971 1,080 1,530
June-July-August September-October-November
_____________________________ _______________________________
0.05 20 161 183 200 233 183 211 230 308
0.10 10 274 303 328 390 252 288 314 401
0.20 5 482 522 561 676 363 412 449 548
0.50 2 1,140 1,200 1,300 1,590 685 767 851 978
_____________________________________________________________________________________________
-------------------------------------------------------------------------------------
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
1897 April 41.00 -- 1967 April 8 36.70 32,200
1936 April 19 -- 16,600 1968 July 23 20.41 12,500
1937 May 5 -- 4,530 1969 April 19 41.08 59,000
1941 April 15 32.00 22,800 1970 April 29 38.20 31,700
1942 April 7 -- 21,900 1971 April 11 29.50 23,400
1943 April 17 33.66 28,700 1972 April 20 34.75 31,100
1944 April 18 21.05 12,300 1973 March 25 24.49 13,400
1945 April 2 31.70 24,600 1974 April 25 -- 43,900
1946 March 30 -- 23,000 1975 May 4 39.80 44,000
1947 April 28 33.12 29,300 1976 April 7 35.00 27,600
1948 April 21 39.81 57,000 1977 April 9 12.12 3,400
1949 April 12 -- 27,900 1978 April 16 41.19 56,200
1950 May 12 41.58 86,500 1979 April 28 43.66 92,900
1951 April 15 30.10 24,600 1980 April 10 29.00 22,400
1952 April 25 -- 23,900 1981 July 3 13.96 7,520
1953 June 26 20.00 14,700 1982 April 17 36.78 35,500
1954 April 15 16.38 11,100 1983 April 9 30.88 21,300
1955 April 11 27.28 18,000 1984 April 6 -- 32,400
1956 April 27 35.16 28,000 1985 May 21 28.12 17,700
1957 July 4 22.33 14,100 1986 April 7 36.59 29,700
1958 July 12 14.53 7,850 1987 April 7 36.61 27,600
1959 April 8 23.78 11,200 1988 April 7 22.12 13,900
1960 April 14 33.71 24,700 1989 April 19 39.35 41,800
1961 March 31 12.98 3,600 1990 April 7 15.54 5,080
1962 April 24 36.26 32,300 1991 July 11 13.26 4,940
1963 April 12 20.42 12,900 1992 March 16 23.28 8,800
1964 April 20 23.60 15,600 1993 August 14 36.48 27,600
1965 April 22 40.43 47,200 1994 April 6 33.57 27,900
1966 April 8 42.15 67,500
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 28 43.66 92,900 1970 April 29 38.20 31,700
1950 May 12 41.58 86,500 1972 April 20 34.75 31,100
1966 April 8 42.15 67,500 1986 April 7 36.59 29,700
1969 April 19 41.08 59,000 1947 April 28 33.12 29,300
1948 April 21 39.81 57,000 1943 April 17 33.66 28,700
1978 April 16 41.19 56,200 1956 April 27 35.16 28,000
1965 April 22 40.43 47,200 1949 April 12 -- 27,900
1975 May 4 39.80 44,000 1994 April 6 33.57 27,900
1974 April 25 -- 43,900 1976 April 7 35.00 27,600
1989 April 19 39.35 41,800 1987 April 7 36.61 27,600
1982 April 17 36.78 35,500 1993 August 14 36.48 27,600
1984 April 6 -- 32,400 1960 April 14 33.71 24,700
1962 April 24 36.26 32,300 1945 April 2 31.70 24,600
1967 April 8 36.70 32,200 1951 April 15 30.10 24,600
1952 April 25 -- 23,900 1963 April 12 20.42 12,900
1971 April 11 29.50 23,400 1968 July 23 20.41 12,500
1946 March 30 -- 23,000 1944 April 18 21.05 12,300
1941 April 15 32.00 22,800 1959 April 8 23.78 11,200
1980 April 10 29.00 22,400 1954 April 15 16.38 11,100
1942 April 7 -- 21,900 1992 March 16 23.28 8,800
1983 April 9 30.88 21,300 1958 July 12 14.53 7,850
1955 April 11 27.28 18,000 1981 July 3 13.96 7,520
1985 May 21 28.12 17,700 1990 April 7 15.54 5,080
1936 April 19 -- 16,600 1991 July 11 13.26 4,940
1964 April 20 23.60 15,600 1937 May 5 -- 4,530
1953 June 26 20.00 14,700 1961 March 31 12.98 3,600
1957 July 4 22.33 14,100 1977 April 9 12.12 3,400
1988 April 7 22.12 13,900 1897 April 41.00 --
1973 March 25 24.49 13,400
_____________________________________________________________________________________
---------------------------------------------------------------------------------------------------------------------------------
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
__________________________________________________________________________________________________________________________________
1936 -- -- -- -- -- -- 5,768 1,826 398.9 117.8 50.1 27.4 --
1937 13.8 -- -- -- -- -- 1,729 1,952 968.4 -- -- -- --
1941 -- -- -- -- -- -- -- -- -- -- -- -- --
1942 -- -- -- -- -- -- 11,400 -- -- -- -- -- --
1943 -- -- -- -- -- -- -- -- -- -- -- -- --
1944 -- -- -- -- -- -- -- -- -- -- -- -- --
1945 -- -- -- -- -- -- 15,870 6,780 3,504 -- -- -- --
1946 -- -- -- -- -- -- 12,430 3,687 2,132 -- -- -- --
1947 -- -- -- -- -- -- -- 10,360 11,140 5,267 1,762 -- --
1948 -- -- -- -- -- -- -- 12,700 3,096 2,067 -- -- --
1949 -- -- -- -- -- -- 11,440 2,977 5,460 3,425 3,265 1,737 --
1950 1,125 1,283 1,069 798.1 729.6 978.7 31,120 58,890 15,360 8,463 3,325 2,300 10,510
1951 2,954 1,987 2,013 1,974 1,830 2,281 17,170 9,022 4,466 2,441 1,245 1,711 4,085
1952 1,360 1,285 1,742 1,639 1,876 1,989 16,590 6,534 3,559 5,676 2,121 1,322 3,797
1953 906.5 812.3 695.5 599.7 619.3 1,669 3,643 3,068 8,839 5,236 2,229 1,320 2,472
1954 864.0 928.2 894.2 809.7 845.4 1,597 5,472 3,862 3,693 2,237 981.3 691.5 1,906
1955 658.3 730.7 683.2 722.6 652.5 661.0 7,273 2,084 3,016 2,271 1,684 862.7 1,771
1956 849.2 607.2 431.0 423.5 451.0 523.9 10,930 8,233 3,963 2,503 908.0 1,616 2,613
1957 599.2 1,080 562.9 441.0 426.8 1,320 4,856 3,728 3,833 6,863 2,614 5,392 2,649
1958 3,625 3,324 1,632 1,356 1,286 1,894 2,986 1,527 1,476 3,990 976.9 479.9 2,052
1959 416.1 498.1 362.3 368.4 382.9 775.8 5,005 1,769 2,587 2,132 776.5 547.8 1,300
1960 547.5 550.2 465.2 572.9 563.4 544.8 13,490 3,778 2,807 2,151 563.7 684.0 2,212
1961 345.2 489.7 356.5 337.1 336.4 1,667 2,097 2,375 1,060 472.0 260.6 368.2 849.5
1962 663.3 422.5 241.1 200.5 203.0 279.5 14,090 9,922 23,420 14,970 6,987 3,390 6,237
1963 2,379 2,114 1,602 1,343 1,120 1,743 6,430 3,511 6,511 2,850 1,172 1,197 2,662
1964 1,435 1,025 787.7 774.2 763.6 694.8 7,567 4,700 7,483 3,227 1,301 694.7 2,529
1965 1,770 1,313 843.3 884.8 872.9 987.4 25,310 13,030 9,178 5,034 2,042 1,915 5,256
1966 4,098 2,497 2,258 2,065 1,826 7,663 38,390 14,400 5,895 3,581 3,512 2,431 7,376
1967 1,847 1,729 1,576 1,710 1,550 2,213 22,710 14,520 5,993 3,278 1,315 876.2 4,939
1968 840.5 724.7 659.3 524.5 535.5 1,713 3,531 2,185 5,594 5,739 2,570 1,899 2,211
1969 1,600 1,865 1,660 1,525 1,576 2,153 27,480 18,730 5,060 3,548 1,666 1,471 5,693
1970 1,968 1,924 1,726 1,381 1,401 1,544 17,340 13,940 12,470 3,727 1,131 1,201 4,973
1971 1,105 1,357 1,096 1,065 1,131 2,640 11,130 3,480 2,429 2,471 1,135 1,413 2,532
1972 4,463 5,653 3,072 1,861 1,449 7,256 22,230 9,171 6,079 2,395 2,439 2,079 5,666
1973 1,775 1,473 1,149 1,126 1,197 6,106 2,450 1,575 1,200 578.7 801.9 3,008 1,874
1974 4,412 2,707 2,014 1,744 1,672 2,016 18,950 18,260 7,633 3,297 3,232 1,967 5,668
1975 1,951 2,079 1,284 1,329 1,435 1,686 16,280 22,890 5,971 28,240 4,003 2,479 7,527
1976 2,364 2,573 1,724 1,630 1,729 3,298 13,300 3,016 1,914 1,359 1,163 712.8 2,886
1977 375.1 276.6 149.3 197.4 201.4 428.5 1,793 938.1 676.4 638.6 243.3 521.0 536.3
1978 1,287 1,121 1,449 1,343 1,124 2,171 36,740 7,427 3,798 3,710 1,537 1,074 5,206
1979 986.1 813.6 797.1 725.2 723.2 879.7 29,260 32,090 6,653 6,268 3,341 2,097 7,076
1980 1,661 1,800 1,491 1,388 1,463 1,654 10,040 2,072 1,532 758.1 488.8 846.2 2,087
1981 556.1 650.7 411.0 304.2 339.6 1,233 1,275 1,365 1,311 2,765 1,509 1,897 1,140
1982 2,571 1,903 1,186 1,112 1,041 1,946 23,650 7,805 3,705 4,246 2,292 1,263 4,386
1983 4,272 2,457 2,114 1,607 1,471 9,329 10,940 3,388 5,122 6,550 2,886 2,941 4,437
1984 2,195 1,978 1,805 1,581 1,582 4,443 19,240 4,246 11,920 3,331 1,442 975.3 4,534
1985 2,208 2,152 1,540 1,326 1,323 6,441 5,751 9,248 8,252 6,962 7,247 4,909 4,803
1986 3,845 2,428 2,313 1,977 1,681 5,311 21,630 16,860 6,437 4,764 2,715 2,993 6,090
1987 3,496 2,037 2,339 1,845 1,673 7,776 15,170 3,427 2,984 2,865 2,502 1,096 3,938
1988 763.6 767.4 695.9 461.5 513.1 2,419 6,250 1,427 946.4 347.7 274.5 328.7 1,262
1989 350.0 332.2 271.0 269.5 356.4 424.8 23,900 4,576 2,292 1,145 451.5 1,048 2,930
1990 474.4 450.9 285.2 174.4 251.8 1,117 2,848 1,513 1,989 1,109 434.7 364.4 917.6
1991 316.6 336.5 245.3 187.0 289.6 680.2 1,894 2,746 2,056 3,179 1,104 1,405 1,208
1992 792.4 593.9 521.7 520.7 500.4 4,887 4,205 2,657 2,176 2,984 1,556 2,557 2,000
1993 1,142 729.2 821.0 813.0 998.0 1,572 15,000 3,915 4,585 10,760 21,580 7,912 5,845
1994 3,800 2,029 1,858 1,539 1,488 7,433 15,550 6,835 6,070 13,920 3,986 4,211 5,748
__________________________________________________________________________________________________________________________________
|
U.S. Department of the Interior ||
U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:46:05 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05092000.html |
|