Question
Download Solution PDFThe flow in a rectangular channel is subcritical. If the width of the channel is reduced at a certain section, the water surface under no-choke condition will
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
When the width of the channel is reduced the term q (Discharge per unit width) increases. The no choke condition means critical depth of flow is not reached.
Case 1: Width of channel is B
The specific energy curve is drawn for the channel
Case 2: Width of channel is B1 (B1 ≤ B)
The specific energy curve corresponding to the width B1 is drawn.
When we consider the subcritical portion the graph,
We find that for the same specific energy the depth decreases when there is reduction in width of the channel. Hence there is a drop at a downstream section.Last updated on Jan 8, 2025
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