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HS9.2/GM9.8/SSS2.31

Measuring and modelling fine sediment sources, transit times and redistribution in river catchments (co-organized)
Convener: Hugh Smith  | Co-Conveners: Will Blake , Philip Owens , Olivier Evrard , Gema Guzmán 
Orals
 / Thu, 21 Apr, 10:30–12:00  / Room 2.44
Posters
 / Attendance Thu, 21 Apr, 17:30–19:00  / Hall A
This session aims to bring together contributions that address methodological aspects of measuring or modelling fine sediment source contributions, transit times and redistribution in river catchments. This includes techniques for quantifying rates of fine sediment transfer through different components of the sediment cascade spanning hillslope to catchment scales, as well as sediment exchange within and between channel networks, floodplains and estuarine environments. It also encompasses techniques for quantifying the residence or transit times of sediment in river catchments over contemporary timescales of most relevance to management.

We invite contributions to this session that address any aspects of the following:

• Developments in field measurement techniques, including instrumentation or data analysis procedures
• Soil and sediment tracing techniques for quantifying soil erosion and redistribution, particularly with reference to uncertainty
• Sediment source tracing or fingerprinting studies, particularly those addressing key assumptions to support development of these techniques
• Applications of radioisotope tracers to quantify sediment transit times over timescales relevant to river catchment management
• Development, applications and testing of catchment models for simulating runoff generation, soil erosion and catchment sediment exports
• Comparing and evaluating different combinations of techniques, including testing of model outputs and assumptions against field datasets and the critical appraisal of method performance under different environmental conditions
• Integrated approaches to developing catchment sediment budgets: linking different measurement techniques and/or models to understand sediment delivery processes