Subject: Proposal for a Submarine Dynamic Pit and Ramp System for Tsunami Energy Dissipation

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Subject: Proposal for a Submarine Dynamic Pit and Ramp System for Tsunami Energy Dissipation

Hello,I would like to share a futuristic engineering concept designed to neutralize tsunamis before they impact the coastline. The project shifts the focus from building coastal walls to manipulating fluid dynamics and gravity on the seabed.

The Submarine Dynamic Pit System operates as follows:Early Activation: As soon as deep-sea sensors detect an incoming tsunami wave, a sequence of massive, fixed steel chambers embedded in the seabed opens up.The Asymmetrical Dynamic Ramp: On the shoreward side of these pits, a curved metallic shield or ramp is raised hydraulically. This creates a physical barrier that stops the wave's forward momentum towards the beach.

The Downward Vortex & Suction Effect: Blocked by the raised ramp, the immense water column of the tsunami is forced downward by gravity and pressure, crashing straight into the open metallic pit.

Subterranean Dissipation & Clean Energy: The captured water is channeled through large underground tunnels away from the coast into the deep ocean. Inside these tunnels, the falling water drives massive hydroelectric turbines, converting the tsunami's destructive kinetic energy into clean electricity to power emergency systems.

I am looking to share this vision with geophysicists, hydraulic engineers, and researchers to explore the structural and fluid dynamics feasibility of this concept.
 
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Welcome to PF.

I assume you only want protection from destructive tsunamis.
Destructive tsunamis that repeat are rare, maybe twice per century in some places. Those places are best protected by sea walls to keep the water out of the higher population areas.

I expect the cost of the materials and labour will be greater than the cost of fixing the damage. The project needs to pay off in the next 10 years to justify the financial investment, but that period is shorter than the period of destructive tsunamis. An alternative strategy, at a much lower cost, would be to migrate cities inland over the next century. Keep the fishing boats on the coast, but move the villages and population onto the hills.

There are also extreme megatsunamis where the water rises over 100 metres, those occur maybe every 100k years. There is no economical way to stop or counter those.
Sydney Australia has recorded regular evidence of tsunamis of Pacific origin, probably from the Kermadec Trench. The last was 100k years ago, well before any human presence in Australia. Another is expected sometime in the next 20k years, when it comes, it will be an extinction event for Sydney and the Australian economy, should it still exist. There have also been other tsunamis, originating from the Indian Ocean, running up onto the coast of Western Australia.