"Adapted mangrove on hybrid platform" – Coupling of ecological and engineering principles against coastal hazards

Hiroshi Takagi
2019 Results in Engineering  
Mangrove forests are expected to act as green infrastructure against coastal hazards. However, mangroves cannot grow along urban coasts where the water is too deep and the wave is too high. This paper conceptualizes a new disaster countermeasure, coined as "adaptive mangrove hybrid platform," which provides a solution to achieve ecosystem-based disaster risk reduction (Eco-DRR) in urban areas; particularly, those in developing countries. The proposed concept is a hybrid solution, starting from
more » ... landfill to level the seabed. A mangrove plantation is then established on the surface. The front part of the landfill is intentionally raised to form a shore-protection mound to reduce wave run-up that may wash away mangrove seedlings. Improvised technology such as wood piles and small stones can also be utilized to protect the landfill from erosion. The platform will inevitably sink owing to self-weight consolidation, land subsidence, and sea-level rise, while sediment deposition trapped by the developed mangrove forest may be the reliable avenue to raise the ground. Hence, the initial geometry of the landfill needs to be appropriately designed in order to achieve an equilibrium state whereby the ground surface is adaptively in balance with the relative sea-level rise. In this paper, many challenges as well as advantages are addressed, with the objective of promoting research to facilitate the exploration of adaptive mangrove hybrid platforms.
doi:10.1016/j.rineng.2019.100067 fatcat:xyih7flu3zcozmswajmei2odhe