Answer: A. Ridge line
Irrigation Canals are generally aligned along the ridge line.
Solution
There are three types of canal alignment
- Watershed/Ridge canals
- Contour canals
- Side-Slope Canals
The main purpose of aligning a canal is to make sure that the water reaches the field by gravity.
Irrigation Canals are generally aligned along the ridge line as it ensures gravity irrigation on both sides of the ridge.
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