Sri Lanka

Sri Lanka depends on monsoon rainfall as the primary source for its water resources; this is highly variable in space and time. Approximately 81% of the island’s population resides in rural areas and depends on agriculture for their livelihoods. Water scarcity in the country’s Dry Zone makes cultivation difficult for part of the year and is a major constraint to development. Climate change aggravates this water scarcity further: monsoons are more erratic and persistent droughts are common. Due to increased demands from agriculture, industry and urbanization, water resources are being rapidly depleted. The government has made a major effort to establish new water infrastructure, renovate existing dams and reservoirs, and promote improved irrigation technologies to meet the demand for agricultural water. Nevertheless, water-related challenges continue to increase, and Sri Lanka’s target to provide a piped water supply to 100% of the population is elusive at best.

IWMI in Sri Lanka

IWMI has been working in Sri Lanka for decades, addressing water management and environmental resilience with a focus on sustainable solutions for agriculture and ecosystems. One of the key projects involves rehabilitating the country’s ancient cascading tank systems, a vital part of Sri Lanka’s agricultural heritage, by taking a holistic approach to restore them as integrated hydrological, socio-economic, and ecological systems. IWMI also works on ecosystem services and wetland management, contributing to Colombo’s Wetland City Accreditation from the Ramsar Convention in 2018, and strengthening community-led conservation strategies. Additionally, the institute is pioneering digital tools for flood and drought monitoring, providing early warning systems and disaster preparedness solutions.

In collaboration with government agencies, IWMI is tackling critical issues such as chronic kidney disease linked to contaminated groundwater, offering evidence-based solutions and working with affected communities. The institute is also focusing on solid waste management, developing guidelines to convert organic waste into high-quality fertilizer, and enhancing food security through the development of a national food waste prevention roadmap. With a strong emphasis on climate resilience, IWMI supports sustainable agricultural practices, groundwater management, and integrated flood and drought management across Sri Lanka, aiming to safeguard water resources and improve livelihoods.

Country representatives

Ian Overton

Ian Overton

Country Manager – Sri Lanka
Lal Muthuwatta

Lal Muthuwatta

Researcher – Hydrology-Hydrological Modelling, Deputy Country Manager – Sri Lanka, CGIAR Country Convener – Sri Lanka
Nishadi Eriyagama

Nishadi Eriyagama

Regional Researcher – Water Resources Engineer, Deputy Country Manager – Sri Lanka

Projects in Sri Lanka

Latest Sri Lanka news

Plant hygiene management for healthy vegetable cultivation

As part of the CGIAR Better Diets and Nutrition Program, IWMI has partnered with the Department of Agriculture, Sri Lanka and the World Vegetable Center to raise awareness on the …

What Sri Lanka’s ban of chemical fertilizers in 2021 can teach the world 

IWMI researchers explore the feasibility of an agricultural revolution in Sri Lanka …

How IWMI taught me to turn data into impact

From Kokuvil in northern Sri Lanka to cutting-edge geographic information systems, Piriyanka Sivananthan shares her learning journey into geospatial science as an intern at IWMI …

Climate finance can unlock the full potential of circular bioeconomy  

An IWMI report explores how climate finance mechanisms can be leveraged to promote circular economy and sustainability …

Latest Sri Lanka publications

Displaying 4 publications
Use of GIS/RS technologies in distributed hydrological modeling of the Walawe River Basin [Sri Lanka]
2004
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Shuttle Radar Topography Mission (SRTM) data for Sri Lanka: potential contributions in river basin research
2004
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Small tank settlements in Sri Lanka
2004
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Human impacts and the status of water quality in the Bundala RAMSAR Wetland lagoon system in Southern Sri Lanka
Wetlands Ecology and Management, 2004
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