10 The annual rainfall at a place for a period of 30 years is given below. Draw the rainfall frequency curve and determine (a) rainfalls of 5-yr, 10-yr and 20-yr recurrence interval (b) the rainfall of probability 0.75 (c) the probability of occurence of rainfall 2 35 cm Year 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 Rainfall (cm) 31.6 30.1 29.8 39.9 37.8 31.3 30.7 38.0 35.7 32.9 30.3 41.0 33.5 34.0 33.3 Year 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 Rainfall (cm) 36.2 33.6 30.2 35.5 36.3 36.4 30.7 33.4 40.4 35.4 33.7 30.1 31.7 33.4 30.2

10 The annual rainfall at a place for a period of 30 years is given below. Draw the rainfall frequency curve and determine (a) rainfalls of 5-yr, 10-yr and 20-yr recurrence interval (b) the rainfall of probability 0.75 (c) the probability of occurence of rainfall 2 35 cm Year 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 Rainfall (cm) 31.6 30.1 29.8 39.9 37.8 31.3 30.7 38.0 35.7 32.9 30.3 41.0 33.5 34.0 33.3 Year 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 Rainfall (cm) 36.2 33.6 30.2 35.5 36.3 36.4 30.7 33.4 40.4 35.4 33.7 30.1 31.7 33.4 30.2

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Probability, risk and uncertainty analysis for hydrological design

It gives a framework that is financially critical for finding the exceptional designs of hydrological systems with a reduced cost in total inclusive of the project cost and the disaster mitigation cost. But there would be hardly any assessment of a decent quality damage function. Hence, errors in demonstrating the hydrologic events, incorrect model parameters, and so on may occur. Here, we will discuss a specific hydrological design that of a detention basin for studying and understanding the risk-based procedure, uncertainties, and probability analysis by following a systematic framework.

Question

(Civil engineering hydrology)

10 The annual rainfall at a place for a period of 30 years is given below. Draw the rainfall frequency
curve and determine
(a) rainfalls of 5-yr, 10-yr and 20-yr recurrence interval
(b) the rainfall of probability 0.75
(c) the probability of occurence of rainfall 235 cm
Year
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
Rainfall
(cm)
31.6
30.1
29.8
39.9
37.8
31.3
30.7
38.0
35.7
32.9
30.3
41.0
33.5
34.0
33.3
Year
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
Rainfall
(cm)
36.2
33.6
30.2
35.5
36.3
36.4
30.7
33.4
40.4
35.4
33.7
30.1
31.7
33.4
30.2
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Step 1: To Draw the rainfall frequency curve

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Step 2: To calculate return period

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Step 3: Graph plotted between the annual rainfall on an arithmetic scale and the return period on a logar

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Step 4: Find out return period

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Step 5: To calculate rainfall of probability

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Step 6: To find out the probability of occurrence of rainfall ≥ 37 cm

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