This case study, one of four in the Greater Mekong region, highlights the flexibility of nature-based solutions in building climate-resilient cities and quantifies their economic, social, and environmental benefits. Supported by the World Bank, The Australian Government's Department of Foreign Affairs and Trade, and other partnerships, it emphasises integrating nature-based solutions into existing infrastructure and strategies to enhance urban flood management.

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It proposes transforming the site into a multifunctional urban wetland that integrates nature-based solutions with smart water technologies. This includes riparian zones, stormwater harvesting, decentralised wastewater treatment and an Internet of Things-enabled water platform. A key feature is the inclusion of an ‘eco-social’ housing scheme, supporting both low- and high-income residents.

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Compared to the original 2008 masterplan, this hybrid strategy offers stronger flood protection, better water quality, lower construction and maintenance costs, and enhanced public amenity. Over a 40-year period, it shows a benefit–cost ratio of 36 and a net present value over USD 51 million. The approach aligns with Vietnam’s green growth goals and supports Thu Duc City’s vision of smart, inclusive urban development. The study recommends revising regulations to enable more flexible public–private partnerships and using Tam Phu Park as a model for future urban infrastructure.

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