Q. A canal aligned at right angles to the contour of a country, is known as
Solution:
- A side slope canal is that which is aligned at right angles to the contours; i.e. along the side slopes.
- It is a canal which is aligned roughly at right angle to contours of the country but not on watershed or valley.
Main Canal: It takes off directly from river or upstream side of head works.
It acts as carrier canal and feeds water to branch canal and major distributaries. - Watershed canal : The canal which is aligned along any natural watershed (ridge line) is called a watershed canal, or. a ridge canal.
- Aligning a canal (main canal or branch canal or distributary) on the ridge ensures gravity irrigation on both sides of the canal.
- A contour canal is an artificially-dug navigable canal which closely follows the contour line of the land it traverses in order to avoid costly engineering works
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