Give a geographical reason for each of the following:

(i) Need to adopt different means of irrigation.

(ii) Need for conserving water.

(iii) Man is responsible for water crisis.

(i) There is a need to adopt different means of irrigation because of uncertainty of rainfall, uneven distribution of rainfall, crop requirements, nature of the soil, effective utilisation of river water and to maximise production.

(ii) There is a need for conserving water for the following reasons-

1. The over exploitation of ground water often results in the lowering of water table.
2. The loss of vegetation causes drought and reduction of rainfall and lowering of the water table.
3. Irrigation utilises more than 90% of the total freshwater.
4. The increase in population results in water scarcity.
5. Our water resources are polluted and their water can hardly be used without adequate treatment.

(iii) Man is responsible for water crisis in India because due to increase in population, irrigation and industrialisation, the demand for water has risen. This has led to a decline in groundwater levels in various parts of the country.