Haining City, Zhejiang Province — China is pioneering the construction of a unique sea wall in Haining city, Zhejiang province, featuring a groundbreaking biological migration corridor. This innovative corridor, designed by the Zhejiang Institute of Hydraulics and Estuary, is specially crafted to facilitate the migration of a local species of crab across the tidal barrier while maintaining the structure’s integrity.
The 1m wide and 80cm deep corridor boasts a carefully designed ascending walled passage, allowing crustaceans to traverse the sea wall effortlessly. This pioneering project marks a significant step for wildlife preservation and ecosystem balance in the region.
Mr. Xu Chao, leading the 14.4km sea wall construction project in the Jianshan section, highlighted the importance of incorporating such corridors for various animals. Future plans include constructing similar pathways for hedgehogs, rabbits, and other wildlife needing unhindered access between habitats.
Construction of the corridor, initiated in March, mimics the natural conditions required for the crabs’ migration. The zigzagging path employs pebbles as stepping stones, and the entire corridor is lined with bricks, with scattered soil, vegetation, and even rotting meat crumbs to provide sustenance for the crabs.
The Jianshan section along the Qiantang River boasts a silted, convex bank with abundant beach resources and natural plant communities, creating an ideal habitat for crabs. Previously, the lack of crossing corridors on the sea wall hindered ecological migration, leading to unfortunate incidents of crab fatalities due to exposure to the sun or being crushed.
This forward-thinking initiative ensures the safety and well-being of local wildlife, setting a precedent for future ecological projects in the region. The construction not only protects the diverse ecosystem but also addresses the unique needs of the inhabitants, fostering harmony between infrastructure development and environmental conservation.
