Abstract

The author provides stable and safe designs of coastal and river bank using a new structural concept which stably keeps frame structure inside of the embankments, and therefore protects the backside of lowland areas, where more than ten millions of people live and social investment facilities are distributed. This new proposal simplifies the design of multi water hazards from the probabilistic collapse risks to deterministic planning for human lives and accumulated social public facilities around coastal mega cities. Those regions distribute in flat low elevation areas for conveniences of foreign trade with port facilities, industries, and traffic infrastructures including hub airports. Mean while, those coastal regions sometimes remains in legendary collapse risks, such as gigantic fires or pandemic infection diseases along with the catastrophic disasters against social frameworks to keep human cultural livelihoods in this modern era of Gaia.