长江口航道疏浚土利用方式与发展方向

Utilization mode and development directions of dredged soil in the Yangtze River Estuary channels

结合近年来长江口航道维护疏浚土利用现状,从疏浚土的处理模式、实施过程及取得成效等方面总结了近年来航道疏浚土综合利用实践所取得的成功经验,主要包括3方面:分期实施,适应不同工程阶段的航道疏浚土特点;权责明晰,创建疏浚土利用的沟通协调模式;合作共赢,探索疏浚土利用的长效运行机制。在此基础上,探讨了今后一段时期长江口航道疏浚土利用的发展方向及建议,针对“十四五”及以后长江口航道疏浚土利用的可持续问题,提出实施横沙浅滩(N23潜堤以东)滩涂整治、横沙六期至八期加高整治工程,以及在深水航道南北坝田区修建大泥库等疏浚土利用的发展方向。研究成果对上海市滩涂资源整治与保护等具有一定指导意义,也可为我国海洋疏浚土资源化利用提供参考。

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 14 th 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.