In towns and cities, generally, bore wells have to be dug very deep to get water as compared to bore wells dug in villages. Give suitable reasons.

Soln:

In towns and cities, generally, bore wells have to be dug very deep to get water as compared to bore wells dug in villages. It is so because of the following reasons :

(i) Excessive use of water in towns and cities depletes the groundwater.

(ii) Towns and cities have asphalted roads, and vast areas of soil are concreted. As a result, rainwater cannot percolate to recharge groundwater, and the groundwater level further decreases. Villages have larger areas of open soil surface and fewer asphalted roads and concrete surfaces. Thus, larger soil surface area is available for rainwater to percolate into the soil easily and recharge the groundwater. As a result, even shallow bore wells yield water in the village.