Latin American Cities Turn Flood Zones Into Parks That Work Both Ways

By Marcus Bennett

For decades, flooding has ranked as the most frequent natural disaster in Latin America and the Caribbean, according to the Inter-American Development Bank. A set of parks in Chile, Mexico and Brazil now treats that fact as a design brief rather than a liability: the projects occupy riverbeds, drainage channels and reservoir edges that hold water during heavy rainfall and serve as public space the rest of the year.

The pattern answers a question many practitioners face on urban water projects. What does a floodable park actually change for a city and its neighborhoods?

Santiago: 4.7 Kilometers of Drainage Canal Become a Linear Park

In Santiago, the Zanjón de la Aguada once carried rainwater, irrigation runoff and sewage in a single channel while industry and informal settlements lined its banks. Recurring floods and pollution reinforced the corridor's separation from the rest of the city.

Chile's Ministry of Public Works has converted approximately 4.7 kilometers of that corridor into the Parque Inundable Víctor Jara. Built in stages since 2013, the park adds pedestrian and cycling paths, playgrounds, sports facilities and green areas to neighborhoods with historically limited access to public space. The channel keeps its drainage function. Later stages include water-retention areas that extend public use along the Zanjón.

Copiapó: Designing for a River's Veleidades

Roughly 800 kilometers north, in Copiapó near the southern edge of the Atacama Desert, the Copiapó River can stay dry for long stretches. The city expanded on both banks, and aggregate extraction, mining waste and debris disposal left a central stretch of riverbed neglected. The dry bed functioned as a barrier between neighborhoods.

Teodoro Fernández Arquitectos designed Kaukari Urban Park to accommodate the river's changing conditions while opening its banks to residents. Fernández stressed the importance of learning to live with the river's veleidades, or unpredictable behavior.

The design sorts the riverbed by elevation. Lower ground stays available for the river and vegetation. Intermediate terraces host walking and gathering. Higher areas hold civic spaces, recreational facilities and sports. Straight pedestrian paths extend the northern street layout; the southern bank follows a more irregular arrangement. What divided the city now carries its everyday circulation.

Temuco: 28 Hectares Where Water Management Meets Collective Memory

In Temuco, in southern Chile, Isla Cautín occupies land between the Cautín River and the Pichicautín stream that flooding has historically exposed. The 28-hectare Parque Urbano Isla Cautín, designed by Osvaldo Moreno and Martínez & Asociados, organizes the site around a large central meadow with wetlands, channels and planted areas that collect and absorb rainwater.

The program carries cultural weight. It includes a ceremonial area for Mapuche traditions and a Human Rights Memorial tied to the site's history during Chile's military dictatorship. Environmental restoration, cultural practice and memory share one territory.

Nogales: Public Space Built Into a 1960s Dam

In Nogales, near Mexico's border with the United States, an earthen dam built during the 1960s gradually became surrounded by housing. Some homes sat directly against its slopes. Wastewater collected in the reservoir, and recurring floods threatened nearby residents.

Taller Capital, led by Loreta Castro Reguera and José Pablo Ambrosi, reconsidered the dam itself rather than only the land beside it. The Colosio Embankment Dam project adds stepped terraces of gabions, wire cages filled with stones, that stabilize the slopes and form pedestrian paths around the water. Flood-accommodating platforms hold sports courts, gardens and playgrounds. A triangular roof provides shade and a gathering place visible from the nearby avenue.

Fortaleza: Nine Ponds Replace an Illegal Dumping Ground

In Fortaleza, Brazil, the Cachoeirinha stream crossed the Presidente Kennedy neighborhood through land affected by illegal dumping and wastewater pollution. Densification reduced open ground and made flooding more frequent.

Architectus S/S designed Rachel de Queiroz Park around nine interconnected ponds that collect water from the stream and surrounding drainage systems. Aquatic vegetation filters pollutants. Walking and cycling paths, sports facilities, playgrounds and gathering areas integrate the hydrological system into a public landscape. The planted ponds have begun supporting local vegetation and wildlife.

What This Means for Practice

These projects accept that site conditions will change, and they budget for it. Different elevations, floodable surfaces and retention systems let public activity coexist with periodic inundation; maintenance and shifting use become part of long-term operation. As expansion continues along rivers and floodplains, each project sharpens the question of how much land cities should keep available for water, and what that land can do between floods.

This article is part of the ArchDaily Topic: The Architecture of Water: Territories, Tensions & Transformations.