Sustainable and adaptive management of sediments in regulated rivers - channel flushing floods

The SAMS - project is split into different parts. The first two include a literature review and the testing of the channel flushing flood concept in four selected rivers in Norway. For the literature review it is targeted to compile a report on state-of-the-art best practice on i) environmental impacts from instream sediment changes from hydropower regulation, ii) existing tools for holistic monitoring and modeling of sediment changes, and iii) best practice on handling and physical in-stream techniques/ solutions in rivers (including flushing floods) to improve in stream sediment quality (iv) systematic classification (GIS-based) of regulated high head Norwegian river systems (e.g. catchment scale geology, quaternary deposits) Including typical habitat features and qualities such as shelter, spawning habitat and connectivity Aim of the channel flushing flood WP in the SAMS - project is to evaluate flushing as a method for substrate improvement using hydrodynamic-numerical modelling tools (e.g. calculating bottom shear stress; specific stream power) focusing on relative differences between different flow magnitudes and critical shear stress calculations for the initiation of motion of sediments (fines to wash out (coarse substrate for turn-over and re-working habitats).