when ever a sloping face of river bank is protected by stone pitching against scour, the pitching is extended beyond the toe to the river side that is called__________________?
Correct answer: C. Launching apron
- A. Toe wall
- B. Protective wall
- C. Launching apron
- D. Guide bank
Explanation
A launching apron is a layer of stone placed beyond the bank toe so that, if scour removes supporting bed material, the stones settle and continue protecting the slope. A toe wall is a fixed structural support at the toe rather than a flexible scour-protection extension.
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