The Brazilian project of filter gardens combines the recovery of lagoon ecosystems with stormwater treatment technologies to mitigate environmental impact.
In an effort to redefine urban water management, the city of Niterói, in the state of Rio de Janeiro, has consolidated the filter gardens of Parque Orla Piratininga as a cutting-edge solution against environmental degradation.
This green infrastructure, which extends over a recovered area of more than 150,000 square meters, represents one of the largest milestones of nature-based engineering in Brazil, specifically designed to clean the local lagoon system through natural biological processes.
The operational core of this initiative lies in its ability to intercept and purify rainwater and sediments before they reach the Piratininga lagoon.
Through a system of constructed wetlands, aquatic plants and specific substrates act as living filters, removing impurities and heavy metals without the need for industrial chemicals.
This approach not only improves the quality of the water resource but also promotes the regeneration of native biodiversity in an area that suffered constant urban pressure.
Beyond the ecological benefit, the Parque Orla Piratininga has been structured as a space for social interaction and environmental education.
The intervention included the installation of bike paths, pedestrian trails, and viewpoints that allow citizens to interact with the recovered environment.
In this way, the local government seeks to balance the protection of the ecosystem with urban development, offering a replicable model for other metropolises facing similar challenges of water pollution and lack of green spaces.
The implementation of these filter gardens is part of a comprehensive resilience strategy against climate change.
By reducing the pollutant load and controlling runoff flow, Niterói strengthens its infrastructure against extreme weather events, ensuring the long-term sustainability of its natural heritage and improving the public health of residents in the oceanic region.
