FS

5 critical components:

magnitude of flow

frequency of occurence of flow above a given magnitude

duration of flood, low flow etc

timing/predictability of flow: important for seeds

rate of change / flashiness: change a lot due to dams (dQ/dt)

allows management of physical processes/landforms

direct form of management

rather local effect only, does not fix the problem - just its effects

easy to controll

small consensus needed

cause + effects are obvious

usefull to threat sections only - e.g. between irreparable sections

increase roughness

setting back flood defense

re-connectin side arms

mimikry natural flow hydrograph

deposit sediment

managing vegetation + wood debris

sustainable solution

does fix the whole system

not very practical

difficult to predict impact

uncontrolled management: not aceptable to managers & owners

too many stakeholders: difficult for consensus

managing downstream of dams: e.g. recruitment box

managing water abstraction level: controll of timing, quantity, seasonality

managing sediment flux

allow landslides