rainwater harvesting | Centre for Science and Environment

rainwater harvesting


Lakes in Courts: Cases on Protection of Lakes

Every Indian city, worth its salt, was known by its water body. In fact, localities were named after this wealth. It made the city, because, people understood the connection between these structures built to harvest rain and their drinking water.

lakes1.jpg

Training Programme on Urban Rainwater Harvesting, Colombo, Sri Lanka

Centre for Science and Environment (CSE) in collaboration with the Ministry of Water Supply and Drainage (MWS&D), Sri Lanka and Colombo based NGO, Lanka Rainwater Harvesting Forum (LRWHF) organised a three day training programme in Colombo on ‘Urban Rainwater Harvesting’ for Srilankan government officials between 27th and 29th April, 2011.

training_programme.jpg

Doing Rainwater Harvesting: FAQs

1. What is RWH and why should I do it? 
It simply means catching and holding rain where it falls and using it. You can store it in tanks or you can use it to recharge groundwater. Doing RWH has the following benefits:

  • Meet household water needs especially during periods of scarcity. Rainwater is the purest form of water that doesn’t contain impurities like fluoride, arsenic, etc.

Who can do it for you?

Aizwal

Mr. Dunglena
Verdant Ridge,
Laiputliang, 
Aizwal-796012, MIZORAM

Ahmedabad

PRAVAH
200 Azad Society, Polytechnic Road, Ambawadi, 
Ahmedabad-380015, 
GUJARAT

Centre for Integrated Development
2nd floor, 96, Azad Society
Nehru Nagar, Ahmedabad, 
GUJARAT 
Email: cfidahmedabad@yahoo.com

Maintenance & Monitoring

Maintenance- the following steps should be adopted to ensure quality of harvested rain water:

Best Practices

Laipuitlang, Aizwal
Laipuitlang is located amidst hilly terrain of Aizwal. The area receives very high rainfall both from the southwest and northeast rainfall. The average annual rainfall of the area is 2049.7 mm and the number of rainy days is 110. The area falls in the high rainfall region of the country. Considering the greater number of rainy days, storage is the best option. Overall there is scarcity of water supply in the region.

Step by Step Process

1. Information collection

A. Types, area and location of catchments

B. Rainfall

C. Geological and Hydrogeological data

D. Water demand

E. Legislation and incentives

Catching water where it falls

water pic

Background

The total area of the Centre for Science and Environment (CSE) building is 1,000 sq. m. The office gets most of its water supply from groundwater through its borewell. The rainwaterwater harvesting system was installed in the building in June 1999.


Rainwater available for harvesting

Average annual rainfall in Delhi - 611 mm (24 inches).

LEGISLATION ON RAINWATER HARVESTING

Implementation of the Bye-Laws in different States & Cities

KERALA
Reform

• The Kerala Municipality Building Rules, 1999 were amended by a notification dated  January 12, 2004 (Local Self Government Department Notification) issued by the

Government of Kerala to include rainwater harvesting structures in new constructions.  Exemption from this can be granted for cases where water logging is common or in areas with impermeable subsoil conditions to considerable depths.

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