Programme 5


Alliance of partner organisations involved in the implementation of sustainable rainwater management solutions on all continents.

Member of :
International Water Association (IWA), Friends of Ecosystem Based Adaptation (FEBA), SDG Lab, Graie pôle Eaux et Territoires, Organisation Météoroloique Mondiale, Global Water Partnership (GWP), Aguasan

IWMI conference, (Credits@IRHA - Sri Lanka, 2018)


In cooperation with :


Setting Rainwater Managers in motion

Since its creation, the IRHA has formed an Alliance of partner organisations involved in the implementation of sustainable rainwater management solutions on all continents. The Alliance is a movement open to Non Governmental Organisations, local authorities, private sector companies and individuals convinced that rainwater is a solution to the problems of the 21st century.

In 2020, the work of energising the network continued in order to truly benefit from the experiences and lessons learned in conservation, integrated water resources management, risk and disaster management, ecosystem services and adaptation to climate change (SDGs) of each country.

We have strengthened our collaboration with key stakeholders by signing strategic agreements (MoUs) with the American Rainwater Catchment System Association (ARCSA), the Mexican Association for the Promotion of Rainwater (AMSCALL) and the Canadian Association for Rainwater Management (CANARM). Since Lanka Rainwater Harvesting Forum (LRWHF), Malawi Rainwater Association (RHAM) and Rainwater Harvesting Cambodia (RWC) have joined the movement.

Synergy work needs to be extended to share lessons learned, to have a stronger voice with donors and decision makers, to explain and convince on the basis of evidence the relevance of better stormwater management. These partnerships must nurture knowledge and understanding of rainfall management and contextualised responses.
Conférence ABCMAC 2019, (Associação Brasileira de Captação e Manejo de Água de Chuva)

Insights from 9th World Water Forum /Dakar


News – Alliance

Image SARNET International Conf. Showcases Rainwater Harvesting as a Sustainable Solution for Climate Resilience
28 August 2023
by Marc Sylvestre

The 2nd SARNET International Conference on Rainwater Harvesting, a Sustainable Solution for Climate Change Resilience and Achieving SDGs, was suc...

Image Rainwater practices around the globe
12 June 2023
by Han Heijnen

An interesting blog on rainwater practice around the globe was recently written by Prof. Mooyoung Han as a contribution to the Rainwater Harvesti...

Image SARNET conference 2023
25 May 2023
by Han Heijnen

The South Asia Rainwater Network (SARNET) is hosted by Lanka Rainwater Harvesting Forum In Sri Lanka. SARNET was set up in late 2019 in order to ...

Other programmes


Programme 1

Rainwater for Water, Sanitation and Hygiene

Access to safe water and sanitation, as well as appropriate hygiene, is a human right and can prevent a significant proportion of water-related diseases.

Read More


Programme 2

Rainfed Agriculture and Food Sovereignty

Rainfed agriculture represents more than 85% of family farming today. Ongoing climate change is impacting on the harvests and food sovereignty of farming communities.

Read More

Programme 3

Disaster risk management and ecosystem restoration

The weakening of forest, mangrove and wetland ecosystems, which helps reduce exposure to major risks, increases the vulnerability of communities to the effects of climate change.

Read More

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