Question

Describe modern methods of roof top rain water harvesting?

Answer 1

modern methods of water harvesting has changed to the economic of the earth It is a technique of increase the recharge of groundwater by capturing and storing rainwater.
this is the best idea for water conservation

Answer 2

some modern methods of roof top water harvesting methods are as follow:

1) ground water dams
2) ground water recharging
3) rain water harvesting for group houses
4) rain water harvesting for individual houses

hope it will usefull