Geography
Give a geographical reason for each of the following:
(i) Loss of water due to evaporation is highest in tanks.
(ii) Many cities have banned construction of tubewells.
(iii) Rabi crops are grown in areas with irrigation facilities.
Answer
(i) Loss of water due to evaporation is highest in tanks due to large area coverage and its shallow depth.
(ii) Many cities in India have banned the construction of tubewells because excessive extraction of groundwater lowers the water table, leading to water scarcity. It can also cause the ground to sink which can damage buildings and infrastructure.
(iii) Rabi crops are grown in areas with irrigation facilities because they are sown in winter when rainfall is low. These crops, like wheat and barley, need a regular water supply, which is provided through irrigation.
Related Questions
Picture 7(a) shows drip irrigation in a field. List its advantages.
Picture 7(b) is Agrasen ki Baoli (New Delhi) — a step-well whose current form is believed to be constructed in the 14th century. The water level varies seasonally. It is designed to ensure water availability throughout the year with all fluctuations. Write a short note on any traditional irrigation method.
Given a choice which modern method of irrigation would you use to irrigate your farm? Give reasons to support your answer.
Nature has endowed India with plentiful water resources. Despite this, acute shortage of water is noticed in some states. What could be the reasons for this shortage?