Hydrological and sedimentological processes of flood layer formation in Lake Mondsee

摘要: Detrital layers in lake sediments are recorders of extreme flood events. However, their use for establishing time series past floods is limited by lack understanding processes detrital layer formation. Therefore, we monitored hydro-sedimentary dynamics Lake Mondsee (Upper Austria) and its main tributary, Griesler Ache, over a 3-year period from January 2011 to December 2013. Precipitation, discharge turbidity were recorded continuously at the river outlet compared sediment fluxes trapped with 3 12 days resolution two locations basin, distance 0·9 (proximal) 2·8 km (distal) Ache inflow. Within observation period, 26 different magnitude (10 110 m3 s−1) have been resulting variable (4 760 g m−2 d−1) including ‘century-scale’ event June The comparison hydrological sedimentological data revealed (i) rapid sedimentation within 3 days after peak runoff proximal 6 10 days distal basin; (ii) empirical thresholds triggering flux floor increasing (20 m3 s−1) basin (30 m3 s−1) (iii) various factors that control transport lake. amount transported controlled catchment availability. distribution mainly driven mesopycnal interflows closely linked duration season which occurred. combined monitoring detailed insights into formation meso-scale peri-Alpine and, thereby, improves interpretation depositional record layers.