Distinguish between inundation canal and perennial canal
Inundation Canals
1. They are taken out of the rivers without building dams, barrages, embankments
2. They are full of water only in the wet season or when the river is overflowing
3. During the dry months, these canals are not useful
4. Water supply is uncertain
5. Irrigates only low-lying areas of land
Perennial Canal
1. Perennial canals are removed from the rivers or reservoirs by constructing dams or barrages
2. They have water throughout the year since the water is stored behind the dam
3. These canals are useful all over the year
4. Water supply is certain
5. Irrigates all types of areas of land