Jinhua City,Zhejiang Province,lies at the confluence of the Wuyi and Yiwu Rivers,where both meet to form the Jinhua River;here one finds the Yanweizhou wetland, covering 26 hectares. It is the last piece of natural riparian wetland to remain relatively intact in the urban fabric of Jinhua,although it has suffered from fragmentation,erosion and sand quarrying. A monsoon climate is characteristic of Jinhua,and the Yanweizhou riparian wetland is affected by annual monsoon flooding. The initial proposal made by Jinhua city officials to tackle these challenges wasto protect the wetland against 20-year and 50-year floods by erecting high concrete retaining walls. These had already been applied to enhance flood protection and land reclamation elsewhere in the city; however, their cumulative effect worsened the destructioncaused by the floods. Implementing the wall would also have had the effect of impedingwater flow and the silt deposits that sustain and rejuvenate the lush wetland ecology. It would have further severed the connection between the riparian flood plains, the riverand the city. Therefore, the designers opposed the idea and advocated demolishing the existing artificial floodwater infrastructure on that site.
文章来源：Kongjian Yu, Yiwu and Wuyi River & Yongning River, in River. Space. Design edited by Martin Prominski etc. Birkuauser. 2017, pp252-257