Answer:
Modem
methods of rooftop rainwater harvesting:
(i) Rooftop rainwater is
collected using a PVC pipe.
(ii) The water is filtered
using sand and bricks.
(iii) An underground tank is
build to fill this water at the time of rains.
(iv) Underground pipe takes
water to sump for immediate usage.
(v) Excess water from the sump
is taken to the well.
(vi) Water from the well
recharges the underground water.
(vii)Later, water can be
withdrawn either from the well or from a hand pump device.
For example, rooftop rainwater
harvesting is the most common practice in Shillong, Meghalaya. Though this
region receives the highest rainfall in the world, yet the state capital,
Shillong faces acute shortage of water. Nearly every household in the city has
a rooftop rainwater harvesting structure.
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