The 130 km coastline of Dapeng, a natural green peninsula between Hong Kong and Shenzhen, is to be redeveloped after being damaged by Typhoon Mangkhut in September 2018.
Following an international design competition launched by the Water Resources Bureau of Shenzhen Municipality, a team comprising Dutch architects KCAP and Felixx was chosen to restore Dapeng to make it more resilient against typhoons.
KCAP and Felixx offered a “Triple dyke” design, featuring an elevated embankment to fortify the coastline. The design proposes a multifaceted dyke system that enables an integrated approach towards the climate, involving an adaptive reorganisation of the shore.
Felixx said, “Water safety strategies are connected to eco-development and nature restoration. This creates a resilient framework for social and economic growth.”
For 32 km of coastline, KCAP and Felixx are developing this concept into projects that will be implemented in six phases. Work will start later in 2019, with completion targeted in 2021.
The Triple dyke moves away from generic shore protection, instead consisting of three development zones, carefully embedded in current conditions and reacting to the future requirements of every single area. The first outer dyke zone increases the resiliency through wave attenuation, erosion reduction, and enhanced sedimentation.
The second middle dyke is an elevated embankment, to stop the storm surge and the water pushed up by the waves.
“It’s not a big wall but a multifunctional zone: an exciting hilly park, an elevated waterfront with urban promenades, a tidal park, or even a public building,” said Felixx.
The third inner dyke is a hybrid structure that manages the rainwater, following the principle of a sponge city. All runoff from adjacent villages and mountains is collected and temporarily stored in rain parks, rain gardens, wet forests, wetlands, and green streets.
Felixx said, “The application of the Triple dyke provides a framework to enhance existing qualities, such as Dapeng’s cultural resources and natural settings, while unlocking potentials for growth.”