Fluvial systems cover much of the Earth’s surface; they convey water, sediments, and essential nutrients from the uplands to the sea, intermittently transferring these materials from the river channel to the adjacent floodplain. The routing of sediment and water through the channel network initiates complex process-form interactions as the river bed and banks adjust to changes in flow conditions. Despite their ubiquity, little is known about the landform-driven morphodynamic interactions taking place within the channel that ultimately determine patterns of sedimentation and changes of channel form. Furthermore, an understanding of how these process-form interactions scale with the size of the fluvial system is also currently lacking. Recent technological advances now afford us the opportunity to study and to quantify these process-form interactions in detail across a range of spatial and temporal scales. This session aims to bring together interdisciplinary researchers working across field, experimental, and numerical modelling approaches who are advancing methods and providing new insights into: (i) sediment transport and morphodynamic functioning of fluvial systems, (ii) evaluating morphological change at variable spatial and temporal scales, such as at event vs. seasonal scales, and (iii) investigating the sedimentology of these river systems. We particularly welcome applications which investigate the morphodynamic response of fluvial systems in all types and sizes and we specifically would like to encourage submissions from early career researchers and students.

Invited speakers:
- Lina Polvi Sjöberg (Umeå University): "Streams frozen in time? Particle- to catchment- scale dynamics of high-latitude post-glacial streams."
- Anette Eltner (TU Dresden): "Unmanned aerial and water vehicle data for hydro-morphological river

Co-organized as HS9.2.8/NH1.15/SSP3.5
Convener: Eliisa Lotsari | Co-conveners: Joshua Ahmed, Christopher Hackney, László Bertalan
| Tue, 09 Apr, 08:30–10:15, 10:45–12:30
Room G2
| Attendance Wed, 10 Apr, 10:45–12:30
Hall X2

Tuesday, 9 April 2019 | Room G2

Chairperson: Eliisa Lotsari and Joshua Ahmed
08:30–08:45 |
| solicited
| Highlight
Lina E. Polvi
08:45–09:00 |
Josuah Tremblay, Martin Lavoie, and Najat Bhiry
09:15–09:30 |
Matilde Welber and Walter Bertoldi
09:30–09:45 |
Léo Szewczyk, Jean-Louis Grimaud, and Isabelle Cojan
09:45–10:00 |
Christopher Feeney, Richard Chiverrell, Hugh Smith, James Cooper, and Janet Hooke
10:00–10:15 |
| Highlight
Guglielmo Stecca, Davide Fedrizzi, Murray Hicks, Guido Zolezzi, Walter Bertoldi, Richard Measures, and Michal Tal
Coffee break
Chairperson: Eliisa Lotsari and László Bertalan
10:45–11:00 |
| solicited
| Highlight
Anette Eltner, Hannes Sardemann, and Robert Blaskow
11:15–11:30 |
Bas Bodewes, Rocio L. Fernandez, Stuart J. McLelland, and Daniel R. Parsons
11:30–11:45 |
Lemma Hanibal, Jan Nyssen, Amaury Frankl, Jean Poesen, Enyew Adgo, and Paolo Billi
11:45–12:00 |
Akos Kalman, Beverly Goodman-Tchernov, Alysse Mathalon, Paul Hill, and Timor Katz
12:15–12:30 |
Morphological properties of alternate migrating bars in meandering rivers: a new theory and application on real world cases
Federico Monegaglia, Marco Tubino, and Guido Zolezzi