黄河泥沙治理的理论与关键技术研究OA

The regulation of sediment-rich rivers constitutes a major scientific challenge for global water resources management and sustain-able watershed development.The Yellow River is characterized by its core natural attributes:limited runoff,abundant sediment,separate sources of water and sediment,and an inharmonious water-sediment relationship.Since the launch of people-centered Yellow River govern-ance,the strategies for Yellow River regulation have evolved from localized passive defense to systematic governance.From the perspective of watershed systems,exploratory research is carried out on theories and key technologies for Yellow River sediment regulation in the new era.Theoretically,the Engineering Cybernetics of Yellow River Sediment takes the whole process of sediment generation and transport as the re-search object.It establishes a four-level hierarchical control structure covering sediment entering the Yellow River,reservoir sediment,chan-nel sediment and estuarine sediment,quantifies the coordination degree of water-sediment relationship,and introduces the watershed develop-ment index and sediment engineering regulation index to realize quantitative evaluation of regulation effectiveness.Technically,key technical systems are collaboratively integrated,including long-term sediment-retaining warping dams against breach failure,reservoir operation of sto-ring clear water and regulating sediment-laden flow,zoned governance of three beach zones,conjugate flow path control,and water-sediment regulation via multi-reservoir group joint operation.Active regulation through"sediment retention,flow regulation,sediment discharge,flood-plain release and sediment dredging"is thereby achieved.In the future,it is necessary to continuously modernize the system and capacity of Yellow River sediment governance,so as to provide theoretical references and engineering practices for the regulation of sediment-rich rivers worldwide.