Utilization mode and development directions of dredged soil in the Yangtze River Estuary channels
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Abstract:
Given the utilization status of dredged soil in waterway maintenance of the Yangtze River Estuary(YRE)in recent years,this study summarizes the successful experience of comprehensive utilization of dredged soil in waterways from the aspects of the treatment mode,implementation process,and achievements of dredged soil. Specifically,it mainly includes three aspects:1)phased implementation to adapt to the characteristics of dredged soil in waterways at different engineering stages,2)clear rights and responsibilities to create a communication and coordination mode of dredged soil utilization,and 3)win-win cooperation to explore the long-term operation mechanism of dredged soil utilization. On this basis,this paper discusses the development directions and suggestions for the utilization of dredged soil in the YRE channels in the future. In view of the sustainable utilization of dredged soil in the YRE channels during the 14th Five-Year Plan period and thereafter,the study preliminarily proposes several development directions of dredged soil utilization,including the implementation of the beach regulation of Hengsha Shoal(east of N23 submerged breakwater)and the elevation regulation project of Hengsha Phase 6-8,as well as the construction of large mud reservoirs in the north and south dam fields of deep-water channels. The research results are of certain guiding significance for the regulation and protection of beach resources in Shanghai and can also provide a reference for the resource utilization of marine dredged soil resources in China.