Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 24 (Q.No. 47)
47.
The total number, of independent equations that form the Lacey's regime theory is
Discussion:
2 comments Page 1 of 1.
ANKIT KUMAR SHARMA said:
5 years ago
3 independent equations which are basically the formula given by Lacey is;
1. VELOCITY.
2. SILT FACTOR.
3. HYDRAULIC MEAN DEPTH.
1. VELOCITY.
2. SILT FACTOR.
3. HYDRAULIC MEAN DEPTH.
(1)
Sadashiva said:
7 years ago
Option (b) is correct.
A rigid bed canal has one degree of freedom i.e. for a given channel a change in discharge would cause a change in the depth only. A man "made alluvial channel has three degrees of freedom i.e.for a given channel, change in discharge can cause changes in width, depth and bed slope. Thus three equations independent of each other are needed, as given by Lacey, to represent three degrees of freedom viz. Depth, width and gradient.
A rigid bed canal has one degree of freedom i.e. for a given channel a change in discharge would cause a change in the depth only. A man "made alluvial channel has three degrees of freedom i.e.for a given channel, change in discharge can cause changes in width, depth and bed slope. Thus three equations independent of each other are needed, as given by Lacey, to represent three degrees of freedom viz. Depth, width and gradient.
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