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Last update: Wednesday, 23-Feb-2005 09:45:45 EST
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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 5.32 1947 0.071 1957 2.09 1.67 0.80 3.52
November 5.43 1950 0.500 1956 1.88 1.26 0.67 3.17
December 1.43 1945 0 m 0.650 0.47 0.73 1.09
January 0.877 1947 0 m 0.310 0.34 1.12 0.52
February 0.804 1947 0 m 0.220 0.31 1.44 0.36
March 12.9 1945 0 m 2.05 3.64 1.78 3.45
April 43.1 1947 0.103 1958 19.5 12.9 0.66 32.8
May 84.2 1950 0.113 1958 15.0 20.1 1.34 25.3
June 30.4 1947 0.820 1952 9.29 7.66 0.82 15.6
July 22.7 1949 0.229 1957 4.98 5.63 1.13 8.38
August 7.96 1944 0 m 2.27 2.00 0.88 3.82
September 3.38 1945 0 m 1.20 0.98 0.81 2.03
Annual 13.4 1950 0.368 1958 5.04 3.41 0.68 100
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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 0 0.10 0.10 0 0 0 0 0.19 0 0
90 0 0 0 0.30 0.38 0.38 0.18 0 0 0.20 0.45 0 0
85 0 0 0 0.67 1.50 1.10 0.37 0 0 0.30 0.45 0 0
80 0 0 0 1.50 2.30 1.80 0.45 0 0.18 0.40 0.65 0 0
75 0 0 0 3.30 2.90 2.20 0.79 0.20 0.18 0.46 0.84 0.20 0.20
70 0 0 0 5.79 3.60 2.20 1.20 0.39 0.29 0.80 0.84 0.20 0.38
65 0 0 0 7.90 5.64 2.80 1.40 0.46 0.40 0.80 0.95 0.30 0.48
60 0 0 0 9.44 6.21 3.50 1.70 0.55 0.47 0.92 1.20 0.38 0.60
55 0.10 0 0 11.5 7.15 3.50 2.00 0.78 0.54 1.10 1.20 0.49 0.75
50 0.10 0 0.17 13.9 7.60 4.73 2.50 0.92 0.63 1.40 1.20 0.69 0.94
45 0.20 0 0.36 15.8 8.92 5.19 2.50 1.30 0.74 1.80 1.60 0.69 1.20
40 0.40 0 0.43 18.4 10.0 5.84 3.60 1.50 1.00 2.10 2.00 0.89 1.50
35 0.57 0.19 0.61 21.5 11.5 6.72 3.60 1.80 1.20 2.40 2.00 1.00 1.80
30 0.57 0.40 0.61 24.3 13.3 7.20 4.30 2.20 1.40 2.80 2.30 1.10 2.30
25 0.57 0.49 0.74 28.2 15.3 7.68 4.30 3.00 1.40 2.80 2.60 1.10 3.60
20 0.66 0.60 1.30 32.5 17.5 10.4 6.33 3.00 1.40 3.20 2.60 1.20 5.18
15 0.66 0.60 1.80 36.7 20.9 15.0 7.13 3.60 1.90 4.20 2.90 1.20 7.44
10 0.76 0.69 5.53 44.0 28.2 22.2 9.87 4.30 2.50 4.20 3.30 1.20 12.6
5 0.87 0.79 14.1 62.4 72.9 33.6 18.9 8.55 4.00 5.60 4.80 1.50 24.5
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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 13.9 7.29 4.26 2.17 1.08
0.95 1.05 22.4 13.6 9.10 5.56 3.26
0.90 1.11 28.9 18.7 13.2 8.71 5.48
0.80 1.25 39.4 27.1 20.3 14.3 9.66
0.50 2 71.1 52.9 42.1 31.8 23.8
0.20 5 129 97.6 79.1 59.5 47.1
0.10 10 176 132 106 77.6 62.2
0.04 25 245 179 140 98.6 79.3
0.02 50 304 216 165 112 90.3
0.01 100 369 254 190 125 99.8
0.005 200 441 294 215 136 108
0.002 500 548 ng ng ng ng
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Probability of occurrence of annual low discharges
[ng, statistic not given]
____________________________________________________________________________________
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)
____________________________________________________________________________________
0.01 100 ng ng 0 0 0 0 0 0.003 0.057
0.02 50 ng ng 0 0 0 0 0 0.006 0.082
0.05 20 ng ng 0 0 0 0 0 0.014 0.138
0.10 10 ng ng 0 0 0 0 0 0.030 0.213
0.20 5 ng ng 0 0 0 0 0 0.068 0.347
0.50 2 ng ng 0 0 0 0 0.120 0.262 0.788
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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
0.10 10 0 0 0 0 0 0 0 0
0.20 5 0 0 0 0 0 0 0 0
0.50 2 0 0 0 0 0 0 0 0.346
June-July-August September-October-November
__________________________ ___________________________
0.05 20 0 0 0 0 0 0 0 0
0.10 10 0 0 0 0 0 0 0 0.046
0.20 5 0 0 0.031 0.224 0 0 0.083 0.159
0.50 2 0.152 0.185 0.480 0.987 0.213 0.274 0.453 0.644
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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
1943 April 5 -- 179 1951 April 8 4.10 71
1944 August 12 -- 30 1952 April 9 3.20 46
1945 April 12 3.88 53 1953 June 17 3.60 62
1946 March 28 -- 42 1954 June 16 -- 49
1947 June 12 5.20 167 1955 April 4 4.51 54
1948 April 13 -- 75 1956 May 13 4.62 105
1949 June 2 5.00 163 1957 June 23 -- 50
1950 April 19 5.97 291 1958 July 5 3.21 22
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 April 19 5.97 291 1955 April 4 4.51 54
1943 April 13 -- 179 1945 April 12 3.88 53
1947 June 12 5.20 167 1957 June 23 -- 50
1949 June 2 5.00 163 1954 June 16 -- 49
1956 May 13 4.62 105 1952 April 9 3.20 46
1948 April 13 -- 75 1946 March 28 -- 42
1951 April 8 4.10 71 1944 August 12 -- 30
1953 June 17 3.60 62 1958 July 5 3.21 22
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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
__________________________________________________________________________________________________________________________________
1943 -- -- -- -- -- -- 17.1 17.3 16.0 4.66 2.87 1.38 --
1944 1.27 1.71 -- -- -- 0.029 7.44 8.69 5.05 4.04 7.96 1.65 --
1945 3.77 1.98 1.43 0.600 0 12.9 21.8 9.75 6.36 1.78 2.31 3.38 5.52
1946 3.95 2.70 0.397 0 0 7.25 18.6 11.2 4.23 4.48 1.93 2.52 4.79
1947 5.32 2.47 1.19 0.877 0.804 1.99 43.1 23.8 30.4 3.86 1.83 0.800 9.67
1948 2.05 1.46 0.181 0.032 0 0.158 33.4 5.81 3.52 9.71 4.37 1.81 5.19
1949 1.77 2.29 0.597 0.029 0 0 20.6 18.8 18.1 22.7 3.22 0.383 7.41
1950 4.49 5.43 0.694 0.400 0.307 0.152 41.6 84.2 12.3 5.68 3.44 0.753 13.4
1951 3.40 2.47 1.10 0.700 0.600 0.500 32.4 11.1 4.38 0.890 1.81 2.26 5.11
1952 1.02 0.797 0.700 0.600 0.500 0.700 25.3 3.33 0.820 11.4 2.24 1.03 4.02
1953 1.61 2.85 1.06 0.158 0 4.71 13.7 7.13 11.3 3.28 2.77 0.480 4.09
1954 1.30 1.22 1.10 0.813 0.739 1.10 12.0 6.51 9.72 1.77 0.642 0.453 3.10
1955 0.655 0.933 0.432 0.081 0 0 11.7 3.70 8.93 1.72 0.216 0 2.35
1956 0.439 0.500 0.152 0 0 0.019 10.9 28.5 13.0 1.44 0.729 1.93 4.82
1957 0.071 0.660 0 0 0 0.997 1.77 0.394 3.62 0.229 0 0.440 0.677
1958 0.252 0.790 0 0 0.061 0.213 0.103 0.113 0.860 2.00 0 0 0.368
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U.S. Geological Survey Maintainer: Webmaster Last update: Wednesday, 23-Feb-2005 09:45:45 EST Privacy || Disclaimer|| Accessibility || FOIA URL: http://nd.water.usgs.gov/pubs/ofr/ofr9821/htdocs/l.05068000.html |
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