Underground wall is planned to contain the advance of the sea, reduce coastal erosion and preserve Brazil’s most luxurious coastline in the face of climate change and intense urban growth

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13/01/2026 às 12:24

A technical project is betting on underground coastal engineering to protect a beach in Santa Catarina, ensure urban safety, and maintain a balance between tourism, high-end real estate, and environmental preservation.

A major urban intervention of significant environmental and economic importance was recently authorized in Balneario Camboriu, attracting national attention.
The city government approved the construction of a underground retaining wall under the Central Beach, with the aim of to contain the advance of the sea e reduce coastal erosion.
The initiative arises primarily as a technical response to Impacts recorded after the widening of the beach strip completed in 2021..
Since then, recurring episodes of High tide and rough seas they started to provoke Flooding and soil instability, which required a long-term structural solution.

Technical project defines buried and invisible structure in the sand strip.

The proposal stipulates that the wall will remain completely buried under the sand, without any visual impact on residents or tourists.
According to technical parameters adopted by the municipality, the structure will have approximately two meters deep.
In addition, the following will be used reinforced concrete and stone base, materials chosen by your high resistance to saltwater.
In this way, the containment acts directly against tidal infiltration, while preserving the coastal landscape.

Post-2021 hangovers accelerated the adoption of a structural solution.

After the widening work was completed in 2021The behavior of the sea began to show more intense effects during periods of rough seas.
Thereby, puddles, ditches and waterlogged areas They have become frequent, especially in stretches near the boardwalk.
Given the increase in these episodes throughout 2022, 2023 and 2024The city government decided to move forward with a definitive solution.
Thus, the underground wall was chosen as an alternative capable of protecting urban space, and the high end real estate Of region.

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The project integrates the redevelopment of the waterfront and a climate adaptation strategy.

In addition to its function as a maritime barrier, the structure is part of a broader waterfront redevelopment project.
The plan includes improvements to the boardwalk, bike lanes, leisure areas, Street lighting e landscaping.
According to Municipality of Balneario Camboriuthe intervention seeks long term security before the rising sea levelassociated with global climate change.
Thus, the proposal combines coastal engineering, urban appreciation e environmental Protection.

Praia Central sustains tourism, the real estate market, and the local economy.

Currently, Balneário Camboriú is recognized as one of the most luxurious cities in Brazil, concentrating some of the tallest residential buildings in Latin America.
During the peak season, the The floating population exceeds one million people.putting pressure on infrastructure and services.
Therefore, the preservation of Central Beach It is considered strategic for the , real estate market and municipal revenue.
Any significant reduction in the width of the beach could therefore generate direct impacts on property values ​​and the local economy.

Coastal adaptation is progressing, but it does not replace environmental policies.

Coastal management experts emphasize that Containment works do not replace long-term environmental policies..
Still, they function as adaptation measures in the face of an increasingly challenging climate scenario.
With its underground wall, Balneário Camboriú is betting on technical planning, urban engineering e environmental prevention to protect your main postcard.
To what extent should coastal cities invest in large-scale adaptation projects to ensure urban development without compromising the environmental future?


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