Dutch Firm To 'Typhoon-Proof' Shenzhen's Eastern Coastline
03 Oct 2019
An international competition was launched to develop a plan to restore Shenzhen's coastline and raise protection standards against the more frequent occurrence of extreme weather events after Typhoon Mangkhut ravaged the city in September 2018.
KCAP + FELIXX won the international competition for the redevelopment of the 130-kilometer coastline of Dapeng, a green peninsula in the bay between Hong Kong and Shenzhen.
Their winning idea... the ‘Triple dike strategy’, is a multifaceted dike system that allows for an integrated approach towards the climate adaptive reorganization of the shore.
Three Levees of Protection
Their plan uses three levees to create different zones with different spatial functions. Flood protection strategies are connected to eco-friendly development and nature restoration, creating what will hopefully be a resilient framework for social and economic growth.
For 32 kilometers of coastline, KCAP + FELIXX is developing this concept into six strategic implementation projects. Development is scheduled to start this year, and is expected to be completed in 2021.
Different functionalities for each zone
According to KCAP + FELIXX, the triple levee moves away from a generic protection wall along the coast, towards the creation of three development zones, carefully embedded in current conditions and responding to the specific future needs of every single area.
The first 'outer' levee zone is designed to increase the resiliency through wave attenuation, erosion reduction and the enhancement of sedimentation.
The second 'middle' levee is an elevated embankment, to stop the storm surge and the water pushed up by the waves. It's not the traditional big wall you see many storm protection barriers take on. Instead, this elevated embankment will be a multifunctional zone with a hilly park and an elevated waterfront with urban promenades.
The third 'inner' levee is a hybrid structure which manages the rainwater from the inner land. This zone is designed according to the principle of a sponge city to soak things up. All runoff from adjacent villages and mountains is buffered, delayed and temporarily stored in rain-parks, raingardens, wet forests, wetlands and green streets.
The plan is that the application of this triple-levee design will provide the mountainous Dapeng peninsula a framework to enhance these existing qualities while unlocking potentials for growth.
Triple dike section: Guanhu
Triple dike section: Moonbay
Triple dike section: Dongshan
Triple dike section: Dongshan mangroves
Triple dike section: Shayuchong
According to KCAP + FELIXX, the application of the triple-dike provides a framework to enhance the peninsula's existing qualities while unlocking potentials for growth. The small-scale identity of the villages is protected and each villages' specific character is strengthened to amplify the rich variation of recreational facilities.
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