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Geographically, the Saemangeum lake is known to have water quality of Grade 3 or lower, making it a stagnant lake of "rotten water" where environmental destruction occurs and water purification costs are excessive.
The idea is to bury oxygen supply pipes every 500m at a depth of -3m to -10m on the bottom of the Saemangeum river.
By supplying oxygen 24 hours a day, introducing beneficial microorganisms, and releasing shellfish and fish that act as biological filters,
pollutants will sink to the bottom of the lake through buoyancy filtration based on material density,
and as they are decomposed by microorganisms, it will become a Grade 1 water quality lake.
We could also build a Hyperloop that goes directly from Saemangeum to Seoul.
If propelled by rubber wheels, it could even reach speeds of 2,000 km/h.
The reason the maximum speed of current rubber or steel wheels does not exceed 800 km/h is due to traction.
As speed increases, the train is lifted by the air, causing it to float.
If it runs at speeds over 1,000 km/h, the front part of the train could take off like an airplane.
Therefore, in a vacuum-based Hyperloop, even rubber wheels can run at 2,000 km/h if the power output is increased.
Many future new technologies will emerge, and it can be said that Saemangeum's potential value is extremely high.
What would happen if all dams, reservoirs, lakes, and the Four Major Rivers were turned into Grade 1 water?