Connotation and development direction of river,lake and reservoir sediment dredging
The siltation problem has a far-reaching impact on China's water conservancy,and sediment dredging is a frequently adopted measure in siltation management in recent years.In view of the current situation and prob-lems of sediment desilting,the relevant theories,technologies and methods in the interdisciplinary field of sediment desilting are systematically sorted out;the scientific understanding of the concepts,connotations,types and basic problems of sediment desilting are elaborated;and four major problems that must be clarified in sediment desilting are put forward:Why Remediate,What to Remediate,Which Methods to Use,and What to do with Treated Sediments.Considering the hazards of siltation on rivers,lakes,and reservoirs,the article categorizes these into three types:physical siltation,chemical pollution,and ecological damage.It delves into the commonal-ities and distinctions between engineering desilting,environmental protection desilting,and ecological desilting.The current state and challenges of siltation control engineering are then reviewed with respect to purpose,objec-tives,means,and subsequent treatment and disposal.Looking ahead,sediment dredging is poised to be a long-term engineering and management endeavor,making the pursuit of more efficient,low-input,green,and sus-tainable technology an inevitable industry development direction.
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