Give geographical reasons —

1. River Damodar is called "river of sorrow".
2. Irrigation by canals is more suitable in northern India as compared to the south.
3. Tank irrigation is used in peninsular India.

1. River Damodar was earlier called "river of sorrow" because of its ravaging floods in the plains of West Bengal which caused heavy losses and destruction. With the construction of several dams the floods of Damodar river have been greatly reduced but even now the floods sometimes affect the lower Damodar Valley.
2. Canal irrigation is more suitable in northern India as compared to the south because the northern rivers are perennial and can supply water to canals throughout the year but the rivers of south India are seasonal and therefore, canals are of no use in dry season.
3. The peninsular India has natural depressions which act as natural tanks and the rocky surface does not allow percolation of water. Therefore, tank irrigation is used in peninsular India.