Question

rain water harvesting in Delhi 500 words​

Answer 1

Answer:

Harvesting rain water is a very common method that has been used since a very long time to save water.

• It means to conserve rainwater for various uses and to prevent it from running off.
• Importance of this is to prevent the water scarcity that is happening in India.
• It is also very convenient.

Also we know that the surface water is not enough to meet the    demands of the people.

Lots of people now depend on groundwater for their uses.

• The groundwater level is decreasing day by day because of desertification, increase in demand due to urbanization etc.

Thus,

Practicing rain water harvesting can maintain the level of the groundwater.

Moreover,

• It prevents waterlogging on roads.
• It also reduces the chances of soil erosion.

Few traditional methods include:

• Collecting the surface runoff water by making a path that directs to a storage space like a tank or pond.

• Next up, we have rooftop rainwater harvesting. Here, the roof of a house or building is used as a collection unit. It includes equipping the roof with pipes that direct to a pit or tank.

Coming to rainwater harvesting in Delhi

Instead of using the traditional method , they have used an innovative approach and is centred on routing the rainwater directly to a bore well. The water gets filtered within the pipe and removes any need for an additional filter system and harvesting pit.

• The Inline Rainwater Harvesting System comprises a pipe filter installed horizontally in the rainwater pipe.

• This system has a Geotextile membrane as cover, at the mouth of the rainwater pipe.
• This is followed by wire mesh at the entry point of the different media.
• This includes coarse sand, gravel/stone aggregate, gravel/stone aggregate. The total length of the filter media is around 90 cm.

Reference- The Hindustan Times

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