Channel adjustment to changes in sediment supply and flow regimes
Event details
| Date | 24.11.2015 |
| Hour | 11:15 › 12:15 |
| Speaker | Prof. Marwan Hassan, The Department of Geography, The University of British Columbia, Canada |
| Location | |
| Category | Conferences - Seminars |
Although more than a century has passed since the development of the DuBoys (1879) sediment transport equation, the fluvial geomorphology/engineering community still lacks an integrated physical understanding of the relations between flow and particle dynamics and bed and stream stability and how they influence river evolution. Predictions of sediment transport rate via hydraulically based functional relations are often more than an order of magnitude different than measured rates. These discrepancies have been explained by the dynamic nature of bed surface structures and armouring, sediment availability, and the assumptions that underlie the relations: uniform sediment and unconstrained movement of sediment, as well as little consideration for the role of sediment supply, storage within the channel, and sediment mobility. Bed state, sediment supply/storage and flow regime play an important role in regulating sediment transport and channel stability and are hence the focus of the current lecture.
Bio: Professor Marwan Hassan is a geomorphologist who has worked extensively throughout the world, within small and large basins alike, including major studies completed for the Yangtze, Yellow and Mississippi river basins. His research interests cover broad aspects of the field from basic process-oriented field studies of particle movements and exchange with surficial sediments, to physical experimentation of bedload transport processes, to in depth reviews of the challenges surrounding water in the Middle East. He has pioneered work in particle tracing technologies, and more importantly linking insights to sediment transport theory, and was one of the first to document the significant effect of spawning salmonids on annual bedload sediment budgets, making clear connections between biological and physical processes. He manages a long running field research station in the coastal mountains just east of Vancouver, British Columbia and he directs the brand new, state of the art mountain channel experimental laboratory at the University of British Columbia, consisting of 8 and 18 meter long flumes, and a new 12 meter long stream table. Surprisingly, Marwan has time for other interests and pursuits, including fathering three beautiful children, and a love for history and politics.
Bio: Professor Marwan Hassan is a geomorphologist who has worked extensively throughout the world, within small and large basins alike, including major studies completed for the Yangtze, Yellow and Mississippi river basins. His research interests cover broad aspects of the field from basic process-oriented field studies of particle movements and exchange with surficial sediments, to physical experimentation of bedload transport processes, to in depth reviews of the challenges surrounding water in the Middle East. He has pioneered work in particle tracing technologies, and more importantly linking insights to sediment transport theory, and was one of the first to document the significant effect of spawning salmonids on annual bedload sediment budgets, making clear connections between biological and physical processes. He manages a long running field research station in the coastal mountains just east of Vancouver, British Columbia and he directs the brand new, state of the art mountain channel experimental laboratory at the University of British Columbia, consisting of 8 and 18 meter long flumes, and a new 12 meter long stream table. Surprisingly, Marwan has time for other interests and pursuits, including fathering three beautiful children, and a love for history and politics.
Practical information
- Informed public
- Free
Organizer
- Prof. Dr. Anton Schleiss & Dr Mário J. Franca, Hydraulic constructions Laboratory, EPFL (LCH)
Contact
- Dr Mário J. Franca, Hydraulic constructions Laboratory, EPFL (LCH)