(a) Locate and name the water reservoirs in Figures 16.1 (a) and (b).
(b) Which has an advantage over the other and why?
Answer:
(a) The water reservoir is a pond in fig. (a) and the underground water body in fig. (b) i.e., the underground water body has more advantage over a water reservoir.
(b) There are many advantages of water stored in the ground. Some of these are as follows:
(i) It does not evaporate.
(ii) It spreads out to recharge wells and provides moisture for crops over a wide area.
(iii) Stagnant water collected in ponds promotes the breeding of mosquitoes. Whereas water stored in the ground does not.
(iv) Water stored in the ground is free from contamination by human and animal wastes.
(v) It is utilized for the benefit of the local population.