A stable channel is to be designed for a discharge of 40m³/s and the silt factor of unity. Calculate the dimensions of the channel using Lacey's regime equations. What would be the bed-width of this channel if it were to be designed by Kennedy's method with the ratio of b/d similar to that obtained from Lacey's method.

A stable channel is to be designed for a discharge of 40m³/s and the silt factor of unity. Calculate the dimensions of the channel using Lacey's regime equations. What would be the bed-width of this channel if it were to be designed by Kennedy's method with the ratio of b/d similar to that obtained from Lacey's method.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter8: Seepage

Section: Chapter Questions

Problem 8.11P

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Concept explainers

Length and Length related Variables

Length can de defined as the measurement or extent of physical quantities or objects from one terminal to another terminal. Stone age humans used finger length, step length, and so on to measure the size or displacement of an object. Nowadays, depending on how precise the measurement requires to be and the object’s size is measured, we use measuring devices for measurements like rulers and steel tape. Most people have used a ruler or tape measure to measure a particular distance or the size of an object. For more precise measurements of tiny objects, the development of measurement tools such as the Vernier caliper, which permits us to measure dimensions within 1/1000 of an inch. In the last few decades, electronic distance measuring instruments (EDMI) have been implemented that permit us to measure distances from a few feet to many miles with reasonable accuracy.

Question

A stable channel is to be designed for a discharge of 40m³/s and the silt factor
of unity. Calculate
the dimensions of the channel using Lacey's regime equations. What would be the
bed-width of this channel if it were to be designed by Kennedy's method with the
ratio of b/d similar to that obtained from Lacey's method.

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Step 1: Given:

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Step 2: Solution:

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Step 3: Channel:

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Step 4: Kenndy's method:

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Step 5: Lacey's method:

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Step 6: Kenndy method:

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