Question
Download Solution PDFA rectangular channel section will be most economical when the depth of flow and bottom width are in the ratio of
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Most economical section is the one whose wetted perimeter is minimum for the given value of discharge.
For minimum wetted perimeter,
d = b/2
∴ d/b = 1 : 2
Additional Information
|
For most economical Channel |
||
|
S.No. |
Shape |
Hydraulic Radius |
|
1 |
Rectangular Channel |
\({y_m} = \frac{y_0}{2}\) |
|
2 |
Trapezoidal channel |
\({y_m} = \frac{y_0}{2}\) |
|
3 |
Triangular Channel |
\({y_m} = \frac{y_0}{{2\sqrt 2 }}\) |
|
4 |
Circular channel |
\({y_m} = 0.29d\) |
Last updated on Jun 14, 2025
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