[2] [3] Form-based restoration techniques include deflectors; cross-vanes; weirs, step-pools and other grade control structures; engineered log jams; bank stabilization methods and other channel reconfiguration efforts. These induce immediate change in the stream, but sometimes fail to achieve the desired effects if degradation originates at a wider scale. Process-based restoration includes restoring lateral or longitudinal connectivity of water and sediment fluxes and limiting interventions within in a corridor defined based on the stream's hydrology and geomorphology.