Underground Wall Planned to Halt Sea Advance, Reduce Coastal Erosion, and Preserve Brazil's Most Luxurious Shoreline Amid Climate Change and Intense Urban Growth

Underground Wall Planned to Halt Sea Advance, Reduce Coastal Erosion, and Preserve Brazil’s Most Luxurious Shoreline Amid Climate Change and Intense Urban Growth

Written by Caio Aviz

Published on 13/01/2026 at 12:24

Imagem aérea mostra a Praia Central de Balneário Camboriú após o alargamento da faixa de areia, área que receberá muralha subterrânea contra o avanço do mar.

2 people reacted to this.

Technical Project Bets on Buried Coastal Engineering to Protect the Beach in Santa Catarina, Ensure Urban Safety, and Maintain the Balance Between Tourism, High-End Real Estate, and Environmental Preservation

A highly relevant environmental and economic urban intervention was recently authorized in Balneário Camboriú, attracting national attention.
The city hall approved the construction of a subterranean containment wall under the Central Beach, aimed at stopping the advance of the sea and reducing coastal erosion.
The initiative arises, above all, as a technical response to the impacts recorded after the widening of the beach completed in 2021.
Since then, recurring episodes of high tide and swells have caused flooding and soil instability, requiring a long-term structural solution.

Technical Project Defines Buried and Invisible Structure on the Beach

The proposal establishes that the wall will be entirely buried under the sand, with no visual impact for residents or tourists.
According to technical parameters adopted by the municipality, the structure will be approximately two meters deep.
Additionally, reinforced concrete and stone base will be used, chosen for their high resistance to saltwater.
In this way, the containment acts directly against the infiltration of tides while preserving the seaside landscape.

Swells After 2021 Accelerated the Adoption of a Structural Solution

After the widening work was completed in 2021, the behavior of the sea showed more intense effects during periods of swell.
As a result, puddles, ditches, and waterlogged areas became frequent, especially in sections close to the boardwalk.
In light of the increase of these episodes throughout 2022, 2023, and 2024, the city hall decided to move forward with a definitive solution.
Thus, the subterranean wall was chosen as an alternative capable of protecting the urban space, tourism, and high-end real estate in the region.

ARTICLE CONTINUES BELOW

The Work Integrates Seaside Reurbanization and Climate Adaptation Strategy

Besides the function of maritime containment, the work is part of a broader seaside reurbanization project.
The plan includes improvements to the boardwalk, bicycle paths, leisure areas, public lighting, and landscaping.
According to the City Hall of Balneário Camboriú, the intervention seeks long-term safety in light of the rising sea levels associated with global climate change.
Thus, the proposal combines coastal engineering, urban enhancement, and environmental protection.

Central Beach Sustains Tourism, Real Estate Market, and 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 high season, the floating population exceeds one million people, putting pressure on infrastructure and services.
Therefore, the preservation of Central Beach is considered strategic for tourism, the real estate market, and municipal revenue.
Any significant reduction of the beach could, therefore, have direct impacts on property values and the local economy.

Coastal Adaptation Advances, but 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 the subterranean wall, Balneário Camboriú bets on technical planning, urban engineering, and environmental prevention to protect its main landmark.
To what extent should coastal cities invest in large adaptation works to ensure urban development without compromising environmental futures?

1 Comment

most recent

older Most voted

Jon

#226634

18/01/2026 19:50

This is utter nonsense.

Respond

Underground Wall Planned to Halt Sea Advance, Reduce Coastal Erosion, and Preserve Brazil’s Most Luxurious Shoreline Amid Climate Change and Intense Urban Growth

Technical Project Bets on Buried Coastal Engineering to Protect the Beach in Santa Catarina, Ensure Urban Safety, and Maintain the Balance Between Tourism, High-End Real Estate, and Environmental Preservation

Technical Project Defines Buried and Invisible Structure on the Beach

Swells After 2021 Accelerated the Adoption of a Structural Solution

The Work Integrates Seaside Reurbanization and Climate Adaptation Strategy

Central Beach Sustains Tourism, Real Estate Market, and Local Economy

Coastal Adaptation Advances, but Does Not Replace Environmental Policies

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

Two helicopters, 41 people, and over 38 tons of bait were mobilized on a remote Pacific atoll to eliminate rats; five years later, native trees grew by 5,000%, seabirds gained habitat, and the rainforest began to regenerate.

Government wants to pay up to R$ 8,000 to more than 2,300 traditional families in over 100 communities in Acre and Amazonas for environmental services provided to the Amazon.

Brazilian family creates machine that transforms seawater into fresh water, produces up to 130 liters per hour, facilitates routine on vessels, and boosts family business along the country’s coast.

Between Egypt and Sudan, Bir Tawil is no man’s land that neither country wants on paper, but in practice has gold mining, nomadic tribes, and even fake “kings.”

Swimming champion Shavarsh Karapetyan dove about 40 times into a frozen lake in Armenia to rescue a sunken bus, saved 20 lives, and lost his career because of it.

Underground Wall Planned to Halt Sea Advance, Reduce Coastal Erosion, and Preserve Brazil’s Most Luxurious Shoreline Amid Climate Change and Intense Urban Growth

Technical Project Bets on Buried Coastal Engineering to Protect the Beach in Santa Catarina, Ensure Urban Safety, and Maintain the Balance Between Tourism, High-End Real Estate, and Environmental Preservation

Technical Project Defines Buried and Invisible Structure on the Beach

Swells After 2021 Accelerated the Adoption of a Structural Solution

The Work Integrates Seaside Reurbanization and Climate Adaptation Strategy

Central Beach Sustains Tourism, Real Estate Market, and Local Economy

Coastal Adaptation Advances, but Does Not Replace Environmental Policies

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

Two helicopters, 41 people, and over 38 tons of bait were mobilized on a remote Pacific atoll to eliminate rats; five years later, native trees grew by 5,000%, seabirds gained habitat, and the rainforest began to regenerate.

To halt the advance of the Sahara, the 8,000 km Great Green Wall in the Sahel relies on reforestation to combat desertification, but by 2026 it remains far behind the goal of 100 million hectares.

Long before sustainable construction became a trend, China built earthen fortresses with multiple floors, a central courtyard, and the capacity to house up to 800 people living in a community.

Switzerland took 17 years to tear through the Alps and build the world’s largest railway tunnel, a 57.1 km passage under 2,300 meters of rock, with 50 °C heat and 28.2 million tons excavated to connect the north to the south of Europe.

Government wants to pay up to R$ 8,000 to more than 2,300 traditional families in over 100 communities in Acre and Amazonas for environmental services provided to the Amazon.

Brazilian family creates machine that transforms seawater into fresh water, produces up to 130 liters per hour, facilitates routine on vessels, and boosts family business along the country’s coast.

Between Egypt and Sudan, Bir Tawil is no man’s land that neither country wants on paper, but in practice has gold mining, nomadic tribes, and even fake “kings.”

Swimming champion Shavarsh Karapetyan dove about 40 times into a frozen lake in Armenia to rescue a sunken bus, saved 20 lives, and lost his career because of it.