Question
Download Solution PDFWhich of the following statements is correct as per Lacey's method for design of alluvial channels?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Lacey gave three independent equation after intensive research in alluvium and gave the idea of regime.
The equations given by Lacey are:
As per lacey, the wetted perimeter P is given as
P = 4.75 √Q
Hence the wetted perimeter of the alluvial channel increases with an increase in design discharge.
Important Point:
Difference between Lacey and Kennedy theory are:-
|
Lacey Theory |
Kennedy’s Theory |
|
Lacey considered a semi-elliptical section |
Kennedy considered a trapezoidal section |
|
Lacey considered boundary material and defined the silt factor |
Kennedy did not give any importance to boundary material. |
|
Lacey gave the equation for the bed slope |
Kennedy didn’t give any such equation |
|
This theory applies to both the alluvial canal and river |
This theory applies to alluvial canal only |
Last updated on Jun 13, 2025
-> BPSC AE 2025 exam date has been revised. The exam will be conducted on July 17, 18 & 19 now.
-> Candidates who were facing technical issues while filling form can now fill the BPSC AE application form 2025 without any issue.
->BPSC AE age limit 2025 has been revised.
->BPSC AE application form 2025 was released on April 30. The last date to fill BPSC AE form 2025 was May 28.
->BPSC AE interview call letters released for Advt. 32/2024.
->BPSC AE notification 2025 has been released.
->A total of 1024 vacancies are announced through BPSC AE recruitment 2025
->The BPSC Exam Calendar 2025 has been released for the Assistant Engineer Recruitment.
-> The selection will be based on a written exam and evaluation of work experience.
-> Candidates with a graduation in the concerned engineering stream are eligible for this post.
-> To prepare for the exam solve BPSC AE Previous Year Papers. Also, attempt the BPSC AE Civil Mock Tests.