Since 2017, IRHA's secretariat has changed, with a young, motivated team guiding the development of our organization. We recognize that rainwater harvesting has a key role to play in mitigating land degradation, biodiversity loss and the risks associated with extreme weather events. IRHA is an NGO registered by Swiss law, with UN ECOSOC status.




Han HEIJNEN - President


Jean Bernard Rebord - Treasurer


Clara Ariza - Secretary


Salvano BRICENO - Member


Bob BOULWARE - Member


Margarita Pacheco - Member




Marc Sylvestre - Executive Director of IRHA

Graduated from a Master in Urban Development (IUG, 2007) and MSc in Water and Environmental Management (WEDC-Loughborough, 2017), Marc has managed numerous development projects in Lebanon, Haiti and Nepal. He participates in the strategic and operational development of the organization (strategy 2018-2020), contributes to the development of projects and seeks funding along with the framing in terms of monitoring-evaluation-impact of the activities implemented.

> LinkedIn


Anne Marie Khetib - Head of Admin and Finance

Administrative and financial director of the World Scout Bureau (WSB) for 9 years, she holds the same responsibilities within our NGO and ensures that our organization, recognized by public utility, implements the required procedures, in terms of good governance and financial management (Swiss GAAP FER 21).

> LinkedIn


Rachel Hosein Nisbet - Director of Communications & Advocacy

Rachel's expertise lies in understanding the complex intersection of cultural practices and environmental processes. Scientific field experience in Svalbard, Britain, Venezuela and the Swiss Alps gives Rachel first-hand knowledge of multiple, terrestrial biomes. Research into river narratives that cultivate readers’ practical wisdom shows her this listening attention is essential to foster socio-ecological wellbeing.

Rachel holds two PhDs, in the geosciences and the environmental humanities, respectively. Her Indo-Trinidadian heritage reinforces her commitment to evolving integrated, socio-ecological practices to improve the capabilities of low-income communities.


Florian Bielser - PM Rainwater Harvesting - Agroforestry

Florian Bielser is a twenty-six-year-old MSc student of environmental engineering at the EPFL, Switzerland. He is currently on placement as an IRHA project manager in Fatick region (Senegal).


Blandine Barthod - PM IWRM/ Watershed management

Graduated from a B.A. in International Relations and a Master in Environmental Sciences, Blandine is interested in addressing water related issues. She is currently monitoring the management of the Blue School programmes as well as launching the “rain communities” project in the area of Pokhara (Nepal).



IRHA Strategy: 2018-2020

This document details our organization's objectives, integrated development methods, and aims until 2020. It clarifies how we work to develop, implement, and evaluate our rainwater harvesting, sustainable development projects and programmes.

We also use a business plan, specifying our working model, position as an NGO, and the added value obtained by collaborating with IRHA. Additionally, our financing plan describes the investment needed to realize our strategy.
These documents are available upon request.

> Contact


2018 Annual Report (in french)

The IRHA Annual Report in 2018 is available in French. We are working on a English Summary. The report presents all the achievements and initiatives implemented in 2018.

> Annual report 2018


An ecosystem of 60+ organizations


Our projects

The Blue Schools

This program aims to educate schoolchildren to the management of water, sanitation and good hygiene practices, but also the recovery of waste to make blue schools, incubators of social change "

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Construction of rainwater harvesting systems in Bhaktapur, to provide safe access todrinking water in 2 schools and 6 camps for displaced families after the 2015 earthquake.

> Read More


The Rain, the soil and the people

Climate change requires us to rethink our management methods and practices. This project aims to build community resilience by combining better management of water resources, trees and soil.

> Discover the initiative "a child, a tree"


" Unserved "

The "Unserved" project aims to provide access to clean water and restore dignity for those who have nothing, the forgotten from water services, who live on the outskirts of our cities and have to fight every day to access even water for drinking.


Workshops: Water and the City

The objective of this workshop is to bring school children to become aware of their environment, and to be able to implement durable, sustainable solutions in their city.

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In the rain ink

The aim of this "In the rain ink" project is to transform the representations of rainwater seen as a nuisance, poetically using the urban environment in which we live.

> Read More



International Rainwater Harvesting Alliance (IRHA)

International Environment House 2
Chemin de Balexert, 9
1219 Châtelaine, Geneva CH

T: +41 22 797 41 57

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Account: 17-198970-3
IBAN: CH15 0900 0000 1719 8970 3