PUB (Public Utilities Board) and NParks Singapore - Active, Beautiful, Clean Waters: Naturalised River and Floodplain Design
Singapore · 2006 · PUB Singapore (Public Utilities Board), in collaboration with NParks Singapore.
The project transformed flood management from a hidden engineering function into a visible and accessible public asset. By replacing a concrete canal with a naturalised river and floodplain system, Singapore demonstrated that urban water infrastructure can simultaneously deliver climate adaptation, biodiversity enhancement, recreation, and community value. The success of Bishan–Ang Mo Kio Park helped establish ABC Waters as a national model for water-sensitive urban design. The programme has influenced the design of waterways, parks, developments, and public spaces across Singapore through formal design guidelines and certification mechanisms. Its greatest impact may be institutional: embedding blue-green infrastructure into mainstream urban planning and water management rather than treating it as a standalone environmental project.
Highlight
Transforming stormwater infrastructure into multifunctional blue-green urban assets that simultaneously provide flood protection, biodiversity, and public space.
Extended description
Launched in 2006, Singapore’s Active, Beautiful, Clean Waters (ABC Waters) Programme represents a shift from conventional drainage engineering toward multifunctional water-sensitive urban design. Led by PUB, the programme seeks to transform drains, canals, and reservoirs from purely utilitarian infrastructure into attractive public spaces that improve environmental quality, climate resilience, and urban liveability.
The flagship implementation is the Kallang River at Bishan–Ang Mo Kio Park, completed in 2012 through a collaboration between PUB and NParks. Before redevelopment, the site contained a straight 2.7 km concrete drainage canal designed primarily for rapid stormwater conveyance and flood control. The canal separated neighbourhoods from the waterway and provided limited ecological or recreational value.
The project replaced the canal with a 3.2 km meandering naturalised river integrated into a 62-hectare urban park. Instead of rapidly channeling runoff downstream, the river was designed using a floodplain concept. During normal conditions, water flows through a smaller river channel. During heavy rainfall, adjacent park areas temporarily function as flood conveyance and storage zones, reducing hydraulic pressure while maintaining flood protection.
A key innovation was the use of soil bioengineering, applied for the first time at this scale in Singapore. Riverbanks were stabilised using vegetation, natural materials, and ecological engineering techniques rather than conventional hard concrete structures. Extensive testing was conducted before implementation. The resulting river corridor supports greater biodiversity and has attracted species not previously present in the canal environment.
Beyond Bishan Park, the ABC Waters Programme is a national framework supported by design guidelines, engineering standards, and a certification scheme that encourages public agencies and private developers to integrate water-sensitive urban design into projects across Singapore. This makes ABC Waters not only a successful restoration project, but also a scalable governance and planning model for urban climate resilience.
ABC Waters is significant because it moves beyond designing individual “green” projects: it embeds water-sensitive design into Singapore's mainstream infrastructure and development system through guidelines, technical standards, and certification.
Demonstrated metrics
2.7 km concrete drainage canal transformed into a 3.2 km naturalised river.
Approximately 62 hectares of parkland redesigned around the river system.
Floodplain design allows adjacent park areas to function as temporary stormwater conveyance and storage zones during major rainfall events.
ABC Waters has evolved into a nationwide programme supported by official design guidelines and certification frameworks for public and private developments.
Real impact
The project demonstrated that flood-control infrastructure can simultaneously provide climate adaptation, biodiversity, recreation, and public-space benefits. Bishan–Ang Mo Kio Park became a flagship demonstration of this approach and helped establish ABC Waters as a wider planning framework. Through guidelines and certification mechanisms, the programme has subsequently embedded water-sensitive urban design across Singapore’s waterways, parks, developments, and public spaces. Its broader impact is therefore institutional: blue-green infrastructure has become part of mainstream urban water and development planning rather than a standalone environmental intervention.
Implementation location & date
ABC Waters launched in Singapore in 2006. Bishan–Ang Mo Kio Park was redeveloped from 2009–2012 and reopened in March 2012. The approach has since been applied across waterways, parks, and urban developments nationwide.
Similar cases elsewhere
Comparable approaches include Room for the River in the Netherlands, Seoul’s Cheonggyecheon restoration, and flood-resilient river and wetland projects in cities across Asia and Latin America.
Sources
https://www.pub.gov.sg/Resources/Publications/ABC-Waters
https://www.pub.gov.sg/Professionals/Working-on-ABC-Waterways/ABC-Waters-Design-Guidelines