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Last update: Tuesday, 31-Aug-2004 10:28:40 EDT
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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 6.00 1942 0 m 0.730 1.60 2.21 0.15
November 10.1 1945 0 m 1.60 2.75 1.72 0.33
December 5.24 1945 0 m 0.860 1.43 1.65 0.18
January 1.34 1951 0 m 0.210 0.37 1.76 0.04
February 217 1930 0 m 14.9 54.1 3.64 3.09
March 256 1946 0 1940 81.0 100 1.24 16.8
April 1,280 1950 8.09 1944 281 393 1.39 58.5
May 609 1950 2.19 1931 64.3 144 2.23 13.4
June 60.9 1950 0.350 1931 17.6 19.6 1.11 3.65
July 73.4 1946 0 1940 10.7 17.7 1.66 2.22
August 24.1 1942 0 m 3.52 6.28 1.78 0.73
September 40.1 1944 0 m 4.44 10.8 2.43 0.92
Annual 164 1950 2.63 1931 41.7 42.1 1.01 100
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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 3.80 1.70 0 0 0 0 0 0 0 0
90 0 0 0 8.06 2.80 0.19 0 0 0 0 0 0 0
85 0 0 0 12.8 4.16 0.45 0.17 0 0 0 0 0 0
80 0 0 0 17.0 5.38 0.69 0.17 0 0 0 0 0 0
75 0 0 0 23.0 6.75 1.60 0.17 0 0 0 0 0 0
70 0 0 0.10 28.8 8.57 2.50 0.36 0 0 0 0 0 0
65 0 0 0.10 34.9 10.2 3.10 0.76 0 0 0 0 0.10 0.08
60 0 0 0.18 41.2 12.9 5.13 1.30 0 0 0 0 0.20 0.16
55 0 0 0.95 50.0 15.0 6.02 1.60 0.10 0 0 0 0.20 0.32
50 0 0 0.95 59.5 17.1 7.86 2.70 0.10 0 0 0.10 0.20 0.64
45 0 0 1.30 71.2 20.2 9.82 4.49 0.29 0.04 0 0.27 0.39 0.90
40 0.10 0 4.76 86.4 24.0 13.1 6.36 0.86 0.04 0 0.44 0.44 1.80
35 0.10 0.10 10.7 113 27.9 16.2 8.66 0.86 0.49 0 0.99 0.44 3.67
30 0.10 0.10 31.3 148 32.6 21.1 10.4 1.30 0.49 0.10 1.60 0.66 6.08
25 0.20 0.17 50.1 196 41.6 27.3 12.5 2.00 0.65 0.27 1.90 0.99 10.9
20 0.30 0.40 89.7 281 54.9 30.9 15.1 2.50 1.10 0.64 1.90 0.99 17.0
15 0.49 0.40 137 486 68.5 37.2 19.0 3.90 3.58 1.20 3.10 1.70 27.2
10 0.89 1.20 292 958 118 47.2 23.8 9.80 9.40 3.20 5.00 2.50 49.1
5 1.20 9.79 495 1,640 298 69.2 30.8 16.8 21.6 0 6.55 3.80 141
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Probability of annual high discharges
[ng, statistic not given]
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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 24.9 10.7 10.6 9.74 7.90
0.95 1.05 83.8 48.7 43.6 34.2 24.9
0.90 1.11 151 99.2 85.5 63.0 43.8
0.80 1.25 292 216 180 125 83.2
0.50 2 888 749 600 400 250
0.20 5 2,230 1,930 1,540 1,050 640
0.10 10 3,350 2,850 2,300 1,630 986
0.04 25 4,930 4,010 3,290 2,450 1,500
0.02 50 6,160 4,820 4,020 3,120 1,910
0.01 100 7,410 5,570 4,710 3,800 2,360
0.005 200 8,650 6,240 5,360 4,490 2,810
0.002 500 10,300 ng ng ng ng
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Probability of annual low discharges
[ng, statistic not given]
____________________________________________________________________________________
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 ng ng ng 0 0 0 0 0 0
0.10 10 ng ng ng 0 0 0 0 0 0
0.20 5 ng ng ng 0 0 0 0 0 0
0.50 2 ng ng ng 0 0 0 0.017 0.140 0.241
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Probability of seasonal low discharges
[ng, statistic not given]
___________________________________________________________________________________________
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 ng 0 0 0 0 0 0 0
0.10 10 ng 0 0 0 0 0 0 0.118
0.20 5 ng 0 0 0 0 0 0 0.709
0.50 2 ng 0 0 0 0.109 0.176 0.521 5.49
June-July-August September-October-November
__________________________ _____________________________
0.05 20 ng 0 0 0 ng ng 0 0
0.10 10 ng 0 0 0 ng ng 0 0
0.20 5 ng 0 0 0.014 ng ng 0 0
0.50 2 ng 0 0.076 0.560 ng ng 0 0
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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
1930 February 24 8.79 990 1944 September 1 4.94 537
1931 April 9 2.81 58.0 1945 March 14 5.70 932
1932 -- -- -- 1946 March 21 5.88 1,120
1933 March 2 6.08 296 1947 March 25 6.22 750
1940 April 16 3.92 63.0 1948 April 18 8.51 3,840
1941 April 3 5.76 847 1949 April 9 7.15 2,080
1942 April 5 6.38 1,140 1950 April 18 8.31 3,940
1943 March 27 7.22 1,150 1951 April 9 6.25 1,420
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 April 18 8.31 3,940 1945 March 14 5.70 932
1948 April 18 8.51 3,840 1941 April 3 5.76 847
1949 April 9 7.15 2,080 1947 March 25 6.22 750
1951 April 9 6.25 1,420 1944 September 1 4.94 537
1943 March 27 7.22 1,150 1933 March 2 6.08 296
1942 April 5 6.38 1,140 1940 April 16 3.92 63.0
1946 March 21 5.88 1,120 1931 April 9 2.81 58.0
1930 February 24 8.79 990
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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]
__________________________________________________________________________________________________________________________________
Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
__________________________________________________________________________________________________________________________________
1929 -- -- -- -- -- -- -- 11.0 10.1 0.258 0.052 0 --
1930 0.113 3.29 0.500 0 217.4 246.9 47.7 25.5 1.60 0.200 0.048 0 44.2
1931 0 0.500 0.200 0 0 1.55 26.7 2.19 0.350 0.339 0 0 2.63
1932 0 0 0 0 10.0 29.2 31.3 9.81 8.77 1.64 1.00 0.500 7.64
1933 0 0 0 0 8.76 111.5 84.4 7.57 0.353 -- -- -- --
1940 0 0 0 0 0 0 19.3 18.5 2.12 0 0 0 3.32
1941 0 0 0 0 0 49.6 262.5 12.6 4.09 6.35 0.935 20.8 29.5
1942 6.00 5.67 3.25 0.677 0.500 12.0 213.9 42.0 25.1 9.27 24.1 4.00 28.7
1943 3.05 1.64 0.545 0.194 0.093 227.0 177.1 35.0 48.2 8.61 0.181 0 42.0
1944 0 0 0 0 0 0.290 8.09 58.5 30.7 8.71 11.1 40.1 13.1
1945 0.310 10.1 5.24 0.403 0.200 213.4 35.3 10.6 7.37 0.926 3.80 0.040 24.3
1946 0.119 0.017 0.777 0.471 0 256.2 51.9 6.03 2.81 73.4 5.80 1.37 33.7
1947 1.13 2.01 0.910 0.032 0 125.2 97.8 14.9 9.24 19.9 5.27 0.150 23.2
1948 0.294 0.417 0.200 0.119 0.100 0.213 1,068 122.9 13.7 8.93 0.655 0 100.0
1949 0 0.157 0.181 0.048 0 0.839 677.8 36.7 20.1 8.08 0 0 61.3
1950 0.206 0.247 0.635 0.035 0 11.3 1,275 609.2 60.9 16.1 2.58 0.600 164.2
1951 0.381 1.62 1.39 1.34 0.714 10.4 426.5 70.6 53.0 7.87 0.871 3.56 47.8
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U.S. Geological Survey Maintainer: Webmaster Last update: Tuesday, 31-Aug-2004 10:28:40 EDT Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr97416/htdocs/f.05055500.html |
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