Obtaining quantitative information on the spatial pattern of soil redistribution during storms and on the spatial sources supplying sediment to rivers is required to improve our understanding of the processes controlling these transfers and to design effective control measures. It is also crucial to quantify the transfer or the residence times of material transiting rivers along the sediment cascade, and to reconstruct the potential changes in sources that may have occurred at various temporal scales. During the last few decades, several sediment tracing or fingerprinting techniques have contributed to provide this information, in association with other methods (including soil erosion modelling and sediment budgeting). However, their widespread application is limited by several challenges that the community should address as priorities.
We invite specific contributions to this session that address any aspects of the following:
• Developments of innovative field measurement and sediment sampling techniques;
• Soil and sediment tracing techniques for quantifying soil erosion and redistribution;
• Sediment source tracing or fingerprinting studies, using conventional (e.g. elemental/isotopic geochemistry, fallout radionuclides, organic matter) or alternative (e.g. colour, infrared, particle morphometry) approaches;
• Investigations of the current limitations associated with sediment tracing studies (e.g. tracer conservativeness, uncertainty analysis, particle size and organic matter corrections);
• Applications of radioisotope tracers to quantify sediment transit times over a broad range of timescales (from the flood to the century);
• The association of conventional techniques with remote sensing and emerging technologies (e.g. LiDAR);
• Integrated approaches to developing catchment sediment budgets: linking different measurement techniques and/or models to understand sediment delivery processes.

Co-organized as GM3.14
Convener: Olivier Evrard | Co-conveners: Will Blake, Gema Guzmán, Philip Owens
| Thu, 11 Apr, 14:00–15:45
Room 2.31
| Attendance Thu, 11 Apr, 16:15–18:00
Hall A

Thursday, 11 April 2019 | Room 2.31

Chairperson: Olivier Evrard
14:00–14:15 |
Ivan Lizaga, Borja Latorre, Leticia Gaspar, and Ana Navas
14:15–14:30 |
Miriam Glendell, Pranav Hirave, Axel Birkholz, Nikki Baggaley, Barry Thornton, Stephen Addy, Jasmine Rose, Lorna Dawson, Natacha Juvanon, and Christine Alewell
14:45–15:00 |
| presentation
Magdalena Uber, Cédric Legout, Guillaume Nord, Luis Cea, Christian Crouzet, François Demory, and Jérôme Poulenard
15:00–15:15 |
Maarten Wynants, Aloyce Patrick, Alex Taylor, Geoff Millward, Henok Solomon, David Gilvear, Pascal Boeckx, Patrick Ndakidemi, and William Blake
15:15–15:30 |
| presentation
Adrian Wagner, Stephan Hilgert, Regina Tiemy Kishi, Sabrina Drummond, Lisa Kiemle, Jan Philip Nickel, Klajdi Sotiri, and Stephan Fuchs
15:30–15:45 |
Alessandro Cattapan, Paolo Paron, Michael McClain, and Mário Franca