Q1) In a catchment area, six rainfall stations are situated as shown in the figure below. Rainfall depths (cm) in year 2016 were as follows: A-22, B-35, C-30, D-29, and E-26, F= 21. Determine the average annual precipitation using the Thiessen-polygons method. 50 km 25 km 20 kra 20 km 50 kra * 26 km >

Q1) In a catchment area, six rainfall stations are situated as shown in the figure below. Rainfall depths (cm) in year 2016 were as follows: A-22, B-35, C-30, D-29, and E-26, F= 21. Determine the average annual precipitation using the Thiessen-polygons method. 50 km 25 km 20 kra 20 km 50 kra * 26 km >

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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Tutorial 4 Question 1 Based on the given annual rainfall data and the Weibull distribution, 1. develop and plot the relationship between annual rainfall and the frequency, 2. calculate the rainfall intensity with a 10-years return period, 3. calculate the exceedance probability of an event of 125 mm and 4. estimate the design rainfall for a 100-years return period. Year 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 P (mm) 70 121 92 66 74 95 06 91 90 90 | 82 96 Year 1992 1993 1994 1995 1996 997 1998 1999 2000 2001 2002 2003 2004 P (mm) 110 115 100 88 80 87 80 72 103 99 97 98
Q 1: Analyzes of the maximum depth of rain in an area showed that the depth is 300 mm and within 24 hours it has a return period of 60 years. Calculate the probability of rain equal to or more than 300 mm occurring three times in 50 consecutive years
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Q3: In a catchment area, approximated by a rectangular of coordinates (50, 0), (100, 50), (50, 100), and (0, 50) km, four rainfall stations are situated inside the catchment. The coordinates of the stations and the annual precipitation recorded by the four stations in 2020 are given in Table below. Determine the average annual precipitation on the catchment using Thiessen-polygon method. Station Coordinate Precipitation (cm) 1 (50, 75) 85 2 (75, 50) 135 3 (50, 25) 95 4 (25, 50) 140
After arranging rainfall data in descending order, the order (m) of 8 cm annual rainfall is 5. The data is 24-hour rainfall of 15 years. Using Hazen formula, the return period (in years) for 8cm rainfall will be:
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Recorded annual maximum 24-hour rainfall magnitudes at stations KTX are as under : YEAR RAINFALL (cm) 1960 12.0 1961 6.0 1962 4.8 1963 7.9 1964 12.0 1965 14.2 1966 13.6 1967 6.0 1968 3.7 1969 2.9 What is the return period, in years, for a 6.0 cm annual rainfall according to (i) Hazen formula; and (ii) Weibull formula respectively?
14.