Portuguese 
English 
Spanish 
5 min of reading 
0 comments 
Project in Chellanam brings together tetrapods, stones, and breakwaters to contain coastal erosion in Kerala, while a new phase aims to expand protection in areas still exposed to the sea’s advance and monsoons.
The coastal village of Chellanam, in the Indian state of Kerala, received a maritime protection structure of 7.3 kilometers to reduce the impacts of erosion and floods caused by the sea’s advance.
The first phase of the project used about 1.5 lakh of tetrapods — a term used in India for 150,000 units — and approximately 800,000 tons of stone, according to information released by the state government and the Indian press.
The project includes a 6.1-meter-high sea wall, six breakwaters, and a 6.64-kilometer walkway.
-
Christmas trees thrown away become a natural wall in England, where volunteers bury thousands of pine trees on the beaches of Lancashire to trap sand, rebuild dunes, and protect homes after the coast has lost 80% of these barriers since the 19th century.
-
The US Navy wants to deploy thousands of robotic boats across the Indo-Pacific by 2030, put more than 30 medium unmanned ships into operation, and establish a new autonomous naval force to enhance surveillance, sea warfare, and pressure on China.
-
With over 200 drones controlled by a single soldier, China showcases an aerial swarm with a vehicle capable of launching 48 aircraft at once and artificial intelligence coordinating reconnaissance, attack, and survival even without communication.
-
USA abandons cement and brick and invests in Light Steel Frame, a system with galvanized steel that reduces construction by up to 70%, improves thermal and acoustic insulation, and delivers houses with millimeter precision and less waste.
The investment for the first stage was estimated at 347 crore rupees, equivalent to about 3.47 billion rupees, as part of a program aimed at protecting coastal communities in Kerala.
Chellanam, located in the Ernakulam district, near Kochi, appears in official records and local reports as one of the areas in Kerala affected by coastal erosion and recurring floods.
During monsoon periods, residents of the region report damage to houses, temporary displacements, and losses to fishing activities.
How tetrapods help reduce the force of the waves
The tetrapods are concrete blocks with four prongs, designed to interlock with each other and dissipate part of the wave energy.
Unlike a completely smooth barrier, the structure allows water to pass between the blocks, which reduces the direct impact on the coastline.
In practice, this type of defense tries to lessen the force that reaches inhabited areas.
When the waves hit the wall, part of the energy is lost among stones and concrete blocks before reaching houses, streets, and areas used by fishermen.
The solution does not eliminate all risks associated with the sea’s advance, but it is adopted in sections where governments and technicians seek to reduce coastal erosion and flooding.
In the case of Chellanam, the National Center for Coastal Research, linked to the Ministry of Earth Sciences of India, had already demonstrated mitigation measures for a fishing village subject to flooding, according to an official statement from the Indian government.
Why Chellanam received a project of this scale
The location of Chellanam helps explain the priority given to the project.
The village is situated in a densely populated strip of Kerala’s coastline, where housing, fishing activities, and local roads are close to the waterline.
This combination increases the damage during high tides, storms, or intense waves during the monsoons.
For years, residents and local leaders have demanded permanent interventions to reduce the community’s exposure.
Before the installation of the tetrapods, some containment measures used temporary solutions, such as sandbags and geobags, which were frequently questioned by community groups.
The choice of a concrete and stone structure represents a shift in the type of response adopted by the state government.
Instead of emergency reinforcements each risk season, the first phase concentrated resources on a fixed barrier, associated with breakwaters and a walkway along the protected stretch.
Local reports indicated that areas already covered by the first stage experienced reduced impacts during recent episodes of sea advancement.
Still, sections outside the protected zone continued to be subject to flooding and wave action, maintaining the pressure for further interventions.
Second phase plans for an additional 6.1 kilometers of protection
The second phase of the project was inaugurated by the Chief Minister of Kerala, Pinarayi Vijayan, on March 7, 2026.
This stage plans to protect an additional 6.1 kilometers, between Puthenthode and Manaserry Fishing Gap, using more than 100,000 tetrapods.
The announced budget for this phase is 404 crore rupees.
The new work front was presented by the state government as a continuation of the coastal protection initiated in Chellanam, especially in areas that remain exposed to erosion and flooding.
At the ceremony, Vijayan stated that the “Nava Kerala” program should not be seen just as a concept, but as a reality associated with the arrival of works and services to different regions of the state.
The statement was made in a speech during the event marking the completion of the first stage and the inauguration of the second.
State ministers, parliamentarians, local leaders, and religious representatives also attended the ceremony.
Among those present were Roshy Augustine, P. Rajeeve, K. J. Maxi, K. V. Thomas, and Bishop Antony Kattipparambil, according to the original report.
Inauguration and start of works did not occur at the same time
Although the second phase was announced in March 2026, a report published in May by Onmanorama stated that the work was still awaiting administrative steps.
Among the pending points were technical approval and contractual formalization.
The execution had been assigned to the Uralungal Labour Contract Cooperative Society, but the effective start depended on the completion of these procedures.
The information is relevant because it differentiates the political inauguration of the stage from the material start of the works on the coast.
For residents of areas still without protection, the schedule has a direct effect on the local routine.
The arrival of the monsoons usually increases concern about strong waves, erosion, and damage to properties near the coast.
Community groups have also called for the extension of the wall to other sections of Chellanam and neighboring regions.
According to these claims, partial protection may reduce impacts in one area but leave nearby communities subject to the same risks.
What science points out about coastal erosion in India
The situation in Chellanam is part of a broader picture observed on the Indian coast.
In response to Parliament, the Ministry of Earth Sciences of India reported that 34% of the country’s coast was vulnerable to erosion, based on an assessment from the period between 1990 and 2018.
The same statement pointed out natural and human factors associated with changes in the coastline.
Among them are storms, sea level rise, sediment variations, port construction, beach mining, and river dams.
In this context, works like those in Chellanam are part of the set of coastal adaptation measures adopted by governments in inhabited areas.
The function of these structures is to reduce damage in specific points while technicians monitor the evolution of erosion and the response of the coastline over time.
Coastal management experts often point out that physical barriers require continuous monitoring, maintenance, and analysis of effects in nearby areas.
This occurs because altering a section of the coastline can change the dynamics of waves and sediments in neighboring regions, depending on local characteristics.
In Chellanam, the protection built in the first phase has come to be observed as a reference for new decisions on coastal engineering in Kerala.
The next stage of the project should indicate whether the combination of tetrapods, stone, breakwaters, and walkway will be able to reduce damage in the still exposed sections.
Be the first to react!