Fluvial morphodynamics are characterized by the coupling between sediment supply, storage, and transport, as well as between flow resistance and bed morphology. However, the relationships between these characteristics vary across fluvial landscapes. Specifically in steep channels, the threshold for motion has been shown to change significantly in space and time, and possibly with slope, and observed sediment transport rates are lower than predicted based on classic equations developed for lowland channels. Macro-roughness elements including large-wood structures complicate estimates of flow resistance and boundary shear stress, and hillslope-channel coupling adds to system disorder. The poor performance of traditional sediment transport approaches consequently limits the utility of channel evolution models to predict the morphology of steep mountain rivers – the lower boundary control of mountainous terrain evolution.
This session welcomes field, experimental, theoretical, and modelling efforts aimed at improving (1) our understanding of the morphodynamics of mountain river channels, as well as (2) predictive models for sediment transport in mountainous channels. In addition, we welcome studies spanning a range of spatial scales, from the grain to landscape scale.

Co-organized as HS9.2.3
Convener: Matteo Saletti | Co-conveners: Claire Masteller, Alexander Beer, Shawn M. Chartrand, Kimberly Huppert
| Tue, 09 Apr, 14:00–15:45
Room G2
| Attendance Wed, 10 Apr, 10:45–12:30
Hall X2

Attendance time: Wednesday, 10 April 2019, 10:45–12:30 | Hall X2

Chairperson: Claire Masteller, Kim Huppert
X2.77 |
Juliana Vargas, Philippe Chang, Alejandro Salazar, and Camila Lopez Vasquez
X2.78 |
Takuma Watakabe, Yuki Matsushi, Yoshinori Kodama, and Hiroyuki Matsuzaki
X2.79 |
Clément Misset, Florent Gimbert, Thomas Geay, Alain Recking, Cédric Legout, Maarten Bakker, Alain Poirel, Sébastien Zanker, and Marine Cazilhac
X2.81 |
Hojin lee, Sungduk Kim, Kukhyun You, Hyungjoon Chang, and Kyewon Jun
X2.82 |
Blanca Marin-Esteve, Cristina Fernandez, and Allen Bateman
X2.83 |
Valeriu Stoilov-Linu, Mihai Niculita, Dan Dumitriu, and Nicusor Necula
X2.84 |
Ron Nativ, Jens Turowski, Liran Goren, Johnathan Laronne, and Niels Hovius
X2.85 |
Ying-Tong Lin and Jr-Chuan Huang
X2.87 |
Mariateresa Balzano, Matteo Toro, Luigi Fraccarollo, Marwan Hassan, and Francesco Brardinoni
X2.88 |
Shusuke Miyata, Taro Uchida, Masaaki Mantoku, Francesco Comiti, and Masaharu Fujita