The counter berm for a canal is provided so as to contain the saturation gradient line _____________ the bank?
Correct answer: A. Within
- A. Within
- B. Out of
- C. Above
- D. Below
Explanation
A counter berm increases the effective width and stability of the canal bank, helping keep the saturation or seepage gradient line within the embankment. If the line moves outside the bank, seepage and piping risks increase.
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