Reporter Topic: Advances in Sediment Transport Dynamics-Hyperconcentrated and Debris Flows

Reporter: Weiming Wu, Chair Professor of Clarkson University

Time: 15:00, Jan.3, 2024

Location: Room 109, Academic Hall of State Key Laboratory

Brief Introduction of Report

This seminar presents: (1) classifications of hyperconcentrated and debris flows; (2) rheological relationships of hyperconcentrated sediment slurries, including Bingham fluid model, granular flow model, quadratic model and Herschel-Bulkley model; (3) the velocity distribution and resistance of uniform muddy flows in laminar and turbulent regimes, and suspended sediment transport of uniform turbulent muddy flows; (4) the velocity distribution and resistance of laminated and turbulent granular flows, and the initiation and sediment transport of granular debris flows; (5) the velocity distribution and resistance of mixed-type flows, and the settling, incipient motion and sediment of coarse sediments in hyperconcentrated slurries; (6) the model equations and closures of gradually-varied hyperconcentrated and debris flows; (7) dynamic features of rapidly-varied hyperconcentrated and debris flows; and (8) the related morphological features. Focus will be given on the new knowledge described in Chapter 12 of the latest book《Sediment Transport Dynamics》by Wu (2023).