An engineer wanted to determine Q20 when he designed a bridge for a highway. He collected and recorded the measured discharge from a station of the river as shown in the following table. He assumed the flood frequency follows the LP3 distribution. Determine Q20. Values of z used for flood frequency analysis as given as follows ARI 100 2.326 50 2.054 20 1.645 10 1.282 5 0.842 Q (m³/s) Run 1 130 430 130 4 180 80 380 7 280 8 180 230 10 330 2. 3.

An engineer wanted to determine Q20 when he designed a bridge for a highway. He collected and recorded the measured discharge from a station of the river as shown in the following table. He assumed the flood frequency follows the LP3 distribution. Determine Q20. Values of z used for flood frequency analysis as given as follows ARI 100 2.326 50 2.054 20 1.645 10 1.282 5 0.842 Q (m³/s) Run 1 130 430 130 4 180 80 380 7 280 8 180 230 10 330 2. 3.

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

Concepts of Flood Control

Flooding is a temporary overflow of water that submerges or covers the the usually dry land. It can also be defined as the overflow of the excess amount of water that covers a huge area of land which is normally dry.

Question

An engineer wanted to determine Q20 when he designed a bridge for a highway. He collected and recorded the measured discharge from a
station of the river as shown in the following table. He assumed the flood frequency follows the LP3 distribution. Determine Q20.
Values of z used for flood frequency analysis as given as follows
ARI
z
100
2.326
50
2.054
20
1.645
10
1.282
0.842
Run
Q (m³/s)
1
130
430
3
130
4
180
80
380
280
8.
180
9
230
10
330
2.

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