1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 97 75 107 75 93 129 153 92 84 121 95 32 17 32 15 28 48 76 27 18 52 26 1) Calculate the exceedance probability, p and recurrence interval, Tp (years) of the observed data using Weibull distribution p = m/(n+1). 2) Develop a regression equation to estimate the return period for a given runoff and rainfall value. 3) Estimate the runoff and rainfall depth for 5, 10, 25, 100 and 500 return periods using the equations derived from question #2.
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 97 75 107 75 93 129 153 92 84 121 95 32 17 32 15 28 48 76 27 18 52 26 1) Calculate the exceedance probability, p and recurrence interval, Tp (years) of the observed data using Weibull distribution p = m/(n+1). 2) Develop a regression equation to estimate the return period for a given runoff and rainfall value. 3) Estimate the runoff and rainfall depth for 5, 10, 25, 100 and 500 return periods using the equations derived from question #2.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Partc
Transcribed Image Text:1984
80
11
1985
97
32
1986
75
17
1987
107
32
1988
75
15
1989
93
28
1990
129
48
1991
153
76
1992
92
27
1993
84
18
1994
121
52
1995
95
26
1) Calculate the exceedance probability, p and recurrence interval, Tp (years)
of the observed data using Weibull distribution p = m/(n+1).
%3D
2) Develop a regression equation to estimate the return period for a given
runoff and rainfall value.
3) Estimate the runoff and rainfall depth for 5, 10, 25, 100 and 500 return
periods using the equations derived from question #2.
Transcribed Image Text:Maximum rainfall and runoff depths (in cm) of a catchment spanning a period
of 21 years are given below. Analyze the data to:
Year
Rain
Runoff
cm
cm
1975
118
54
1976
98
45
1977
112
51
1978
97
41
1979
84
21
1980
91
32
1981
138
66
1982
89
25
1983
104
42
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