1. The following is a rainfall record of each 5-minute interval measured during a storm: time (min) 5 10 15 20 25 30 35 40 rainfall (mm) 0.7 2.0 2.5 2.2 2.1 1.6 1.2 0.3 (1) plot the Rainfall hyetograph (2) plot the Cumulative rainfall hyetograph (3) determine the 10-minute maximum rainfall intensity? (4) determine the 20-minute maximum rainfall intensity? (5) determine the 30-minute maximum rainfall intensity?

1. The following is a rainfall record of each 5-minute interval measured during a storm: time (min) 5 10 15 20 25 30 35 40 rainfall (mm) 0.7 2.0 2.5 2.2 2.1 1.6 1.2 0.3 (1) plot the Rainfall hyetograph (2) plot the Cumulative rainfall hyetograph (3) determine the 10-minute maximum rainfall intensity? (4) determine the 20-minute maximum rainfall intensity? (5) determine the 30-minute maximum rainfall intensity?

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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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

1. The following is a rainfall record of each 5-minute interval measured during a storm:
time (min)
5
10
15
20
25
30
35
40
rainfall (mm)
0.7
2.0
2.5
2.2
2.1
1.6
1.2
0.3
(1) plot the Rainfall hyetograph
(2) plot the Cumulative rainfall hyetograph
(3) determine the 10-minute maximum rainfall intensity?
(4) determine the 20-minute maximum rainfall intensity?
(5) determine the 30-minute maximum rainfall intensity?

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A rainfall hyetograph shows a) the total volume of rainfall for a storm event; b) the cumulative volume of rainfall with time over the duration of a storm event; c) the variation of rainfall event over a watershed; d) the intensity of volume of rainfall as a function of time; e) none of the above
Hope your help hydraulic CEE 340
Q2 (b) A 240-minute storm is recorded with the mass curve in Table Q2-2. (i) Calculate the incremental depth of rainfall in the interval and intensity. (ii) Draw the hyetograph of the storm at 30-minute interval with graph paper in Appendix 1. (iii) Calculate the maximum intensity-duration.
For a 14 hours storm, accumulated rainfall is given below. Time (hours) 02 4 6 8 10 12 14 Accumulated rainfall (cm)| 0 | 0.8 3.0 5.8 6.9 8.1 9.6 10.8 If $index for the catchment is 0.4 cm/h, then the intensity of effective rainfall at 8th hour will be cm/h.
The following rainfall data in 5-minute intervals were recorded for a storm: Time (min): Depth (in) 5 :0.07 10 :0.20 15: 0.25 20: 0.22 25 :0.21 30: 0.16 35 :0.12 40 :0.03 a) plot the rainfall hyetograph as intensity (in/hr) versus time (min) b) calculate the maximum depth (in.) and intensity (in/hr) recorded in 5, 10, 20 and 30 minutes