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Statistics of monthly and annual mean discharge
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Maximum Minimum Mean
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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
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October 1,040 1917 32.8 1912 414 273 0.66 6.46
November 828 1910 13.8 1912 341 222 0.65 5.32
December 700 1910 9.00 1912 283 188 0.66 4.43
January 530 1910 4.00 1912 220 148 0.67 3.43
February 530 1910 4.00 1912 225 159 0.71 3.51
March 2,200 1910 7.00 1912 507 551 1.09 7.92
April 3,580 1916 85.5 1912 1,260 969 0.77 19.6
May 3,750 1927 93.1 1912 990 935 0.94 15.5
June 2,320 1916 98.3 1912 859 571 0.66 13.4
July 1,890 1916 64.4 1911 562 467 0.83 8.78
August 1,100 1916 30.8 1911 363 304 0.84 5.67
September 1,300 1916 26.0 1911 379 336 0.89 5.92
Annual 1,330 1916 77.4 1912 516 330 0.64 100
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Monthly and annual flow duration, in cubic feet per second
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Percentage
of days
discharge Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Annual
equaled or
exceeded
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95 4.00 4.00 7.95 112 180 169 76.2 42.5 29.5 41.2 16.2 18.3 35.6
90 56.7 42.8 45.1 203 307 266 169 90.1 79.3 147 91.0 78.8 80.8
85 77.4 49.4 70.1 326 352 319 206 121 100 180 134 110 111
80 86.1 76.8 78.4 367 395 366 226 144 123 197 152 119 139
75 108 91.2 100 400 432 415 247 162 155 209 167 128 168
70 119 98.5 135 443 469 463 269 177 181 221 184 140 204
65 125 104 161 500 518 512 298 192 205 245 206 151 232
60 130 109 187 588 570 555 326 209 220 282 228 170 258
55 142 143 224 692 632 589 357 227 235 312 250 198 290
50 174 211 264 792 695 622 388 245 250 343 272 228 329
45 212 266 304 933 756 658 419 265 277 375 330 252 369
40 232 290 389 1,100 816 731 472 286 307 409 359 307 412
35 281 318 426 1,300 882 809 531 323 354 450 384 338 454
30 311 355 473 1,520 957 902 653 399 423 493 408 381 515
25 339 370 568 1,750 1,030 1,020 765 489 501 548 441 434 586
20 366 386 644 2,030 1,180 1,220 865 592 567 631 479 467 687
15 395 401 789 2,340 1,410 1,580 1,010 707 785 750 517 500 811
10 426 435 1,650 2,790 2,440 2,020 1,180 847 940 826 709 576 1,100
5 0.05 0.05 2,320 3,930 3,470 2,520 1,460 1,060 0.49 1,000 954 651 1,780
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Probability of occurrence of annual high discharges
[ng, statistic not given]
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Maximum mean discharge
(ft3/s)
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Recurrence Maximum
Exceedance interval instantaneous 3-day period 7-day period 15-day period 30-day period
probability (years) (ft3/s)
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0.99 1.01 561 331 312 248 205
0.95 1.05 998 667 573 448 360
0.90 1.11 1,330 934 777 605 482
0.80 1.25 1,840 1,360 1,100 861 679
0.50 2 3,240 2,520 2,040 1,630 1,280
0.20 5 5,280 4,150 3,520 2,930 2,330
0.10 10 6,630 5,150 4,560 3,920 3,150
0.04 25 8,280 6,280 5,890 5,270 4,300
0.02 50 9,450 7,030 6,880 6,330 5,230
0.01 100 10,600 7,700 7,850 7,430 6,220
0.005 200 11,600 8,310 8,820 8,570 7,270
0.002 500 13,000 ng ng ng ng
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Probability of occurrence of annual low discharges
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Minimum mean discharge (ft3/s)
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Number of consecutive days
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Non- Recur-
exceed- rence
ance inter- 1 3 7 14 30 60 90 120 183
prob- val
ability (years)
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0.05 20 0 3.21 7.46 10.6 12.4 14.5 17.3 20.5 34.5
0.10 10 3.93 7.52 15.1 20.0 24.6 30.5 35.6 42.3 62.6
0.20 5 10.2 18.5 31.8 39.5 50.3 64.6 73.9 87.3 115
0.50 2 39.1 70.9 98.7 114 142 178 198 225 265
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Probability of occurrence of seasonal low discharges
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Minimum mean discharge (ft3/s)
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Number of consecutive days
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Non- Recurrence
exceedance interval 1 7 14 30 1 7 14 30
probability (years)
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December-January-February March-April-May
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0.05 20 8.20 12.1 12.8 13.9 7.50 15.5 18.1 24.4
0.10 10 16.0 23.8 26.0 28.7 14.6 28.0 33.5 51.3
0.20 5 33.1 48.7 54.4 60.5 31.2 54.2 65.8 111
0.50 2 104 143 160 176 115 164 194 340
June-July-August September-October-November
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0.05 20 0 13.8 33.4 50.1 2.86 15.2 21.0 41.7
0.10 10 12.1 31.6 56.1 75.9 7.03 37.6 46.9 73.7
0.20 5 24.9 73.3 98.5 120 18.2 88.2 102 133
0.50 2 83.1 230 237 260 74.2 232 265 306
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Annual peak discharge and corresponding gage height
[--, no data]
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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
1910 March 24 8.70 3,220 1921 April 8 8.80 3,300
1911 June 9 10.00 4,550 1922 April 13 9.70 4,200
1912 September 24 6.30 1,080 1923 April 21 9.80 4,300
1913 April 7 -- 3,820 1924 April 20 5.70 895
1914 June 11 6.30 1,230 1925 June 9 9.00 3,500
1915 June 29 8.40 2,880 1926 June 22 8.10 2,640
1916 April 16 15.00 8,000 1927 April 12 11.40 6,080
1917 April 10 10.70 5,270 1928 April 6 8.10 2,640
1918 March 26 5.90 995 1929 March 18 11.80 4,200
1919 July 4 12.70 7,600 1930 May 13 7.45 2,020
1920 April 16 9.20 3,700
Annual peak discharge, from highest to lowest, and corresponding gage height
1916 April 16 15.00 8,000 1921 April 8 8.80 3,300
1919 July 4 12.70 7,600 1910 March 24 8.70 3,220
1927 April 12 11.40 6,080 1915 June 29 8.40 2,880
1917 April 10 10.70 5,270 1926 June 22 8.10 2,640
1911 June 9 10.00 4,550 1928 April 6 8.10 2,640
1923 April 21 9.80 4,300 1930 May 13 7.45 2,020
1922 April 13 9.70 4,200 1914 June 11 6.30 1,230
1929 March 18 11.80 4,200 1912 September 24 6.30 1,080
1913 April 7 9.40 3,820 1918 March 26 5.90 995
1920 April 16 9.20 3,700 1924 April 20 5.70 895
1925 June 9 9.00 3,500
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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]
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Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
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1909 -- -- -- -- -- -- -- -- -- 1,385 947.7 966.8 --
1910 926.3 827.7 700.0 530.0 530.0 2,200 2,265 1,334 785.8 405.8 250.0 220.0 916.5
1911 214.0 156.0 162.0 125.0 95.0 150.0 375.0 290.0 623.8 64.4 30.8 26.0 192.3
1912 32.8 13.8 9.00 4.00 4.00 7.00 85.5 93.1 98.3 162.0 160.4 258.6 77.4
1913 314.0 279.7 125.0 86.3 83.9 78.5 1,371 412.9 293.0 221.3 168.7 156.2 298.5
1914 209.1 207.3 110.6 124.5 102.3 214.8 457.0 467.2 573.5 328.9 225.4 296.6 276.7
1915 414.6 269.3 274.8 215.0 370.0 523.5 707.5 762.3 1,135 1,280 490.9 444.9 575.0
1916 509.5 406.5 475.2 368.0 373.0 418.0 3,580 3,280 2,322 1,886 1,105 1,300 1,334
1917 1,040 797.8 523.7 300.5 389.1 647.4 2,435 1,040 652.8 436.0 223.1 218.1 724.7
1918 215.0 240.0 120.0 80.0 40.0 362.5 355.7 473.4 482.8 238.1 193.2 103.9 243.1
1920 -- -- -- -- -- -- 2,357 1,023 1,356 761.3 531.6 498.5 --
1921 445.2 350.4 360.0 339.9 332.1 282.4 1,020 658.8 691.1 387.3 236.6 308.4 450.5
1922 329.3 199.0 343.1 208.0 285.8 300.4 1,462 1,519 703.3 306.7 216.3 244.2 510.1
1923 218.9 271.8 217.5 131.5 129.7 111.4 1,317 822.6 449.5 291.8 213.0 200.7 364.4
1924 213.9 234.8 199.9 145.6 211.3 62.5 313.4 441.9 340.6 232.5 171.3 114.3 223.3
1925 155.9 98.8 56.6 67.7 40.7 349.1 289.5 382.8 1,302 433.0 164.4 281.8 301.9
1926 515.5 371.0 395.8 355.7 281.5 771.8 777.8 493.0 896.9 492.9 236.3 257.9 487.9
1927 384.2 302.7 187.2 136.6 104.5 447.0 2,806 3,750 1,969 887.1 700.6 759.2 1,039
1928 665.2 511.9 500.0 400.0 440.0 958.2 1,159 946.1 1,451 931.3 923.6 952.7 819.8
1929 795.9 693.0 473.7 434.7 359.2 1,543 1,331 881.0 639.9 422.8 297.0 257.3 679.4
1930 258.2 238.7 150.0 120.0 101.0 207.1 688.4 728.6 416.7 245.3 136.4 90.0 282.3
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U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:45:50 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05076500.html |
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