The city of Colombo, a bustling metropolis often defined by its rapid vertical expansion and coastal ambitions, possesses a hidden, pulsating “green heart” that has long remained the silent sentinel against environmental catastrophe. This heart, composed of a complex and intricate network of marshes, waterways, and floodplains, serves as more than just a vestige of a tropical past; it is a vital, living system upon which the resilience of the entire urban landscape depends. Historically, these expansive wetlands have been the victim of profound misunderstanding, frequently characterised as unproductive wastelands or neglected voids ripe for reclamation and concrete development. However, a pioneering international initiative is now challenging this narrative, seeking to re-establish the profound connection between the citizens of Colombo and the waterscapes that sustain them.
The project, titled “Rewriting Colombo’s Wetlands: Harnessing stories, histories, and heritage for inclusive wetland management in Sri Lanka,” represents a landmark collaboration between the International Water Management Institute (IWMI), the University of Hull in the United Kingdom, and the University of Kelaniya in Sri Lanka. Formally launched in early May 2026, this £300,000 endeavour, funded by the British Academy’s International Interdisciplinary Research Projects, is instrumental in shifting the focus of environmental conservation from purely technical engineering solutions to a more holistic, community-centric approach. By weaving together geographical data with the rich tapestry of local memory and heritage, the project aims to transform how the 2.3 million residents dependent on these ecosystems perceive and protect their natural surroundings.
The Historical Context of a Fragile Ecosystem
For centuries, the area that now constitutes modern Colombo was defined by its fluidity, where the Kelani River met the Indian Ocean through a series of lagoons and marshes. These ecosystems were once replete with diverse flora and fauna, serving as the antithesis to the encroaching industrialisation that began during the colonial era. As the city expanded, the systematic infilling of these wetlands became a standard practice, driven by an insatiable demand for land and a fundamental lack of appreciation for the ecological services provided by these marshlands. This historical apathy has resulted in a precarious contemporary reality where the city’s “green heart” has been fragmented, leaving urban populations increasingly vulnerable to the perennial threat of monsoon-induced inundation.
The “Rewriting Colombo’s Wetlands” project acknowledges that the restoration of these areas cannot be achieved through physical intervention alone. Instead, it posits that the key to long-term sustainability lies in the revitalisation of cultural memory. Professor Stewart Mottram of the University of Hull, who leads the project alongside Professor Briony McDonagh and local experts, has emphasised the importance of storytelling in this process. By documenting the oral histories of elders who remember a time when the wetlands were integral to local livelihoods, providing fish, fodder, and recreation, the research team is building a compelling case for their preservation. These stories are not merely nostalgic reminiscences; they are essential data points that illustrate the historical resilience and utility of the wetlands as living systems.
A Partnership for Urban Resilience
The collaboration between the University of Hull, the University of Kelaniya, and IWMI is a testament to the global nature of climate challenges and the necessity of interdisciplinary solutions. Drawing upon the success of the earlier “Risky Cities” project in the UK, which utilised creative arts and local histories to engage communities in flood risk management, the current project adapts these methodologies to the unique socio-cultural context of Sri Lanka. The involvement of the University of Kelaniya ensures that the research remains grounded in local expertise, while IWMI provides the critical scientific framework necessary to translate community engagement into policy-level changes.
Central to the project’s mission is the concept of inclusive wetland management. In the past, environmental policies were often top-down, dictated by institutional bodies with little regard for the day-to-day realities of those living on the fringes of the marshlands. This project seeks to invert that dynamic by empowering residents to become community stewards. By involving local people in the mapping of their own heritage and the identification of ecological threats, the initiative fosters a sense of ownership that is essential for preventing further encroachment and pollution. This shift from passive observation to active stewardship is instrumental in ensuring that the wetlands are no longer seen as “the government’s problem,” but as a shared communal asset.
The Critical Role of Wetlands in Flood Control
One cannot overstate the importance of Colombo’s wetlands in mitigating the devastating impacts of flooding. As climate change continues to alter rainfall patterns, the city faces more frequent and intense storms. In this context, the wetlands act as a natural sponge, absorbing vast quantities of storm-water and releasing it slowly, thereby preventing the catastrophic surges that have historically overwhelmed the city’s drainage systems. The economic value of this natural infrastructure is immense; without these marshes, the cost of constructing artificial flood barriers would be astronomical, and the loss of life and property would be significantly higher.
Furthermore, these ecosystems play a sophisticated role in urban cooling, a factor of increasing importance as Colombo grapples with the “urban heat island” effect. The presence of large bodies of water and dense vegetation significantly lowers the ambient temperature of surrounding neighbourhoods, providing a natural form of climate control that is both energy-efficient and sustainable. By protecting the “green heart,” the project is not only safeguarding biodiversity but also enhancing the liveability of the city for all its inhabitants.
Community Heroes: The Vanguard of Protection
The true success of the “Rewriting Colombo’s Wetlands” initiative lies in the hands of the community heroes who have stepped forward to defend their environment. From students at the University of Kelaniya conducting field surveys to local residents who have organised clean-up drives and awareness campaigns, a new generation of environmental advocates is emerging. These individuals are the living embodiment of the project’s goals, demonstrating that when people are provided with the knowledge and the platform to share their stories, they become the most effective guardians of their heritage.
The vision for the future of Colombo is one where the “green heart” is not a separate entity to be walled off, but a vibrant part of the urban fabric. Through the continued efforts of IWMI and its partners, there is a burgeoning hope that the transferable models of stewardship developed here can be applied to other regions in the Global South facing similar challenges. As the project progresses toward its conclusion in 2028, the focus remains steadfast on ensuring that the voices of the community remain at the forefront of the conservation conversation.
In conclusion, the “Rewriting Colombo’s Wetlands” project serves as a profound reminder that our relationship with nature is deeply rooted in our history and our identity. By honouring the past and engaging with the present, the people of Colombo are not only defending a physical landscape but are also reclaiming their role as the rightful custodians of their environment. The journey toward a resilient and sustainable city is a collective one, and it begins with the recognition that the “green heart” of Colombo must be protected at all costs for the generations yet to come.
Source: IWMI (May 8, 2026)
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