Question

mention any two water harvesting structure

Answer 1

(a) Water harvesting : It means capturing of rain water where it falls or capturing the run off in a local area and taking measures to keep the water clean by not allowing polluting activities to take place.

(b) Water harvesting structures: Khadin and Kulhs

Answer 2

Methods of Rainwater Harvesting

Broadly there are two ways of harvesting rainwater

Surface runoff harvesting

Roof 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.
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