Question

All the methods of rainwater harvesting system.

Answer 1

Broadly there are two ways of harvesting rainwater

Surface runoff harvestingRoof top rainwater harvesting

Rainwater harvesting is the collection and storage of rainwater for reuse on-site, rather than allowing it to run off. These stored waters are used for various purposes such as gardening, irrigation etc. Various methods of rainwater harvesting are described in this section.

1. Surface runoff harvesting

In urban area rainwater flows away as surface runoff. This runoff could be caught and used for recharging aquifers by adopting appropriate methods.

2. Rooftop rainwater harvesting

It is a system of catching rainwater where it falls. In rooftop harvesting, the roof becomes the catchments, and the rainwater is collected from the roof of the house/building. It can either be stored in a tank or diverted to artificial recharge system. This method is less expensive and very effective and if implemented properly helps in augmenting the groundwater level of the area.

Answer 2

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Rainwater Harvesting➫ The technique used to store rainwater by making water harvesting structure to recharge the underground water resource.

♦ It is one of the methods that can be used for water conservation.

♦ It can be a paved area like the terrace or courtyard of a building.

♦ If we are to have a sustainable future, then rainwater harvesting is going to have to become an important part of our life.

♦ The catchment of a water Harvesting system is the surface which directly receives the rainfall and provides water to the system.

➧ Types of rainwater harvesting system are:-
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❱ Direct Pumped
❱ Indirect Pumped
❱ Indirect Gravity

➧ It comprises components of various stages:-
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❱ Transporting Rainwater through pipes or drains.

❱ Filtration.

❱ storage in tanks for reuse or recharge.

➧ How is the Rainwater Harvesting Done:-
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❱ By taking rooftop rainwater directly into the ground by drain pipes, dug well or Sunk for water pump.

❱ By taking rain water directly into pond & tanks.

❱ By making percolation tanks, well, deep pits or trenches in the path of rainwater.

➧ Advantages of Rainwater Harvesting are:-
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❱ It reduces run of loss of rainwater.

❱ It maintains supply of water during dry month.

❱ It recharges underground water.

❱ It checks soil erosion.

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