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(a) Locate and name the water reservoirs in Figures 16.1 (a) and (b).

(b) Which has an advantage over the other and why?

Answers (1)



(a) The water reservoir is a pond in fig. (a) and 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 benefits of the local population
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