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La captación del agua de lluvia es una técnica de recolección y almacenamiento de agua de lluvia en tanques o embalses naturales, o de infiltración de aguas superficiales en yacimientos acuíferos (antes de que se pierdan en escorrentía superficial). Un método de captación de agua de lluvia es la captación en techos. En la captación en techos, puede utilizarse la mayoría de la superficie, como tejas, láminas de metal y plástico, pero no la paja u hojas de palma, para interceptar el flujo del agua de lluvia y abastecer a la vivienda de agua potable de alta calidad y almacenamiento durante todo el año. Otros usos incluyen agua para huertos, ganado, irrigación, etc.

Las razones para usar sistemas de captación de agua de lluvia responden tres preguntas:

¿Qué?: La captación de agua de lluvia mejorará el suministro de agua, la producción de alimentos y en última instancia, la seguridad alimentaria.

¿Quién?: Las viviendas o individuos que no tienen suministro seguro de agua en zonas rurales serán los más beneficiados con los sistemas de captación de agua de lluvia.

¿Cómo?: La captación de agua de lluvia provee un suministro de agua quefacilita la seguridad alimentaria y contribuirá significativamente a la generación de ingresos.

3R (Recharge, Retention & Reuse)	Business Development - Micro-financing	Multiple Use Services (MUS)	SamSam RWH Tool
Rain is Gain Tool	Rainwater Harvesting GIS Map	WASH Environmental Sustainability Assessment

Rooftop	In situ	Surface water	Groundwater recharge	Fog and dew

Salyan and Dailekh, Nepal	Salyan District, Nepal	Kajiado, Kenya - 3R and MUS	Rwambu, Uganda - Clearwater Revival	Rwambu Uganda Hills

Example rainwater harvesting in India

A temple pond at Mylapore, Chennai, India

Tamil Nadu is the first Indian state to make rainwater harvesting mandatory. On 30 May 2014, the state government announced that it will set up 50,000 rainwater harvesting structures at various parts of the capital city of Chennai. [1]

Around 4,000 temples in Tamilnadu state traditionally had water tanks that were used for various rituals. The tanks also served as natural aquifers and helped recharge groundwater. Over the years, however, many of these tanks have gone out of use. Overflowing mounds of silt and garbage have replaced the water in them.

Now, following sustained campaigns by voluntary organisations and departments in charge of water distribution and use, authorities in Chennai have decided to restore around 40 major temple tanks in the city. The aim is to convert the tanks into catchments for rainwater harvesting. [2]

Rainwater harvesting links

Regional experiences

• Traditional rainwater harvesting systems to the rescue! Rainwater harvesting systems are a success in India.
• Chennai - A Success Story: Rainwater Harvesting
• Pluvia: ENERGY # “PLUVIA” :: RAIN USED TO ILLUMINATE LOW INCOME HOMES (MEXICO, 2014)

Technologies & methods

• COMPONENTS OF A RAINWATER HARVESTING SYSTEM
• Smart 3R Solutions
• Tree-based sustainable farming in rainfed areas - webinar
• Rain Water Harvesting Innovation for Making Potable Water Available in Saline Groundwater Areas

Products

• Water Towers: Check Out These Amazing Towers In Ethiopia That Harvest Clean Water From Thin Air
• Groasis waterboxx: Using 1 liter of water instead of 10!
• bob® bag: bob® gives customers access to clean water.
• Rainwater pillow: The Original Rainwater Pillow is an innovative rainwater & storm water harvesting system designed to be stored in horizontal wasted space.
• Rainsoucer: Made in the U.S.A., the patent pending RainSaucer™ is a rain barrel accessory that allows you to harvest rainwater

Organizations & groups

• Rainwater harvesting sources. A list of 45 NGOs, government organizations, and some private companies that focus on rainwater harvesting programs, policies, and supplies.
• Rainwater for Food Security: We set an enabling environment for rainwater harvesting (RWH), in order to significantly increase food security. With help of our community on Rainwater Harvesting, we support the development of a more unified global network of national and regional organisations, networks and professionals, working in or interested in rainwater harvesting. By bringing together these key-actors and sharing knowledge in multiple ways, the Rainwater for Food Security programme aims to achieve sustainable change in rainwater harvesting programmes.
• Rainwater Harvesting Community on Dgroups.

Community Exchange - Rainwater Harvesting

The image below is the entry to conversations about rainwater harvesting (RWH) including best practices, troubleshooting, and advice about tanks and systems. We sourced these from the Rainwater Harvesting Community - a sub community within the Rural Water Supply Network community on Dgroups - which is a free member-only forum, where people can ask a pool of over 700 members from 86 countries about rainwater harvesting. You can become a member on their site for greater involvement, if you have questions you need to know for your RWH project. Click on the image to get started! Or click here.

Field experiences

These projects are utilizing rainwater harvesting techniques and are part of the project listing in Really Simple Reporting (RSR) on Akvo.org. Click the image to get started!

RSR Project 790 WASH program in Rural Bangladesh	RSR Project 427 Scale up of Sustainable Water Access	RSR Project 446 Etude technique d’avant-projet	RSR Project 158 Rainwater harvesting for Nicolas School	RSR Project 128 Safe water supply for Fayaco, Senegal

RSR Project 398 Rainwater Harvesting Capacity Center	RSR Project 533 Support on WASH - in Miyo woreda	RSR Project 459 Upscaling CLTS for Healthy Communities	RSR Project 456 Partnership in WASH services delivery	RSR Project 462 Northern Region WASH Programme

RSR Project 440 Raising awareness on rainwater harvesting	RSR Project 439 Wetland Management & Water Harvesting	RSR Project 545 Rain Water Harvesting in Nepal	RSR Project 403 Rainwater Harvesting in Kenya	RSR Project 840 Rainwater harvesting in Guinee Bissau 2

Acknowledgements

Many of the tools, technologies, and projects on this page are courtesy of the Rainwater Harvesting Implementation Network.

RAIN is an international network with the aim to increase access to water for vulnerable sections of society in developing countries - women and children in particular - by collecting and storing rainwater.

Started in December 2003, RAIN focuses on field implementation of small-scale rainwater harvesting projects, capacity building of local organisations and knowledge exchange on rainwater harvesting on a global scale.

• This rainwater harvesting page can also also be found on the Rainwater harvesting page in Wikiversity.