Q1 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 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 1978 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