Canals are a channel for supply of water from rivers to the farm fields. The perennial canals are not only an advantage but can be disadvantageous too. The perennial canals are functional in the state of Punjab due to the favourable situations available there.

(i) What conditions favour the development of canal irrigation in the mentioned area?

(ii) State two disadvantages of it.

Briefly explain why groundwater levels are dropping rapidly in India.

Give a geographical reason for each of the following:

(i) Many farmers in India still use wells.

(ii) There is very little recharge of groundwater.

(iii) Tubewells are important in Punjab.

(i) What is watershed management?

(ii) How is it beneficial for farmers in the long run?