Question

discuss in brief how rainwater harvesting can be done

Answer 1

Rooftops: If buildings with impervious roofs are already in place, the catchment area is effectively available free of charge and they provide a supply at the point of consumption.
Paved and unpaved areas i.e., landscapes, open fields, parks, stormwater drains, roads and pavements and other open areas can be effectively used to harvest the runoff. The main advantage in using ground as collecting surface is that water can be collected from a larger area. This is particularly advantageous in areas of low rainfall.


Waterbodies: The potential of lakes, tanks and ponds to store rainwater is immense. The harvested rainwater can not only be used to meet water requirements of the city, it also recharges groundwater aquifers.
Stormwater drains: Most of the residential colonies have proper network of stormwater drains. If maintained neatly, these offer a simple and cost effective means for harvesting rainwater.

Answer 2

Answer:

hope this helps you :)

Explanation:

How to Harvest the Rainwater?

Rainwater harvesting systems consists of the following components:

->Catchment- Used to collect and store the captured Rainwater.

->Conveyance system – It is used to transport the harvested water from the catchment to the recharge zone.

->Flush- It is used to flush out the first spell of rain.

->Filter – Used for filtering the collected Rainwater and remove pollutants.

->Tanks and the recharge structures: Used to store the filtered water which is ready to use.

The process of rainwater harvesting involves the collection and the storage of rainwater with the help of artificially designed systems that run off naturally or man-made catchment areas like- the rooftop, compounds, rock surface, hill slopes, artificially repaired impervious or semi-pervious land surface.

Several factors play a vital role in the amount of water harvested. Some of these factors are:

->The quantum of runoff

->Features of the catchments

->Impact on the environment

->Availability of the technology

->The capacity of the storage tanks

->Types of the roof, its slope and its materials

->The frequency,  quantity  and the quality of the rainfall

->The speed and ease with which the Rainwater penetrates through the subsoil to recharge the groundwater.