Potential secondary effects of <scp>in?stream</scp> wood structures installed for natural flood management: A conceptual model

The use of in-stream wood is one the most commonly employed natural flood management (NFM) techniques. effectiveness NFM structures in reducing risks (i.e., their “primary” effect) has been relatively well documented. However, additional or “secondary” effects on other processes have not fully evaluated. These secondary can be inferred by reviewing previous studies that scrutinized accumulations artificial constructed for purposes than NFM. degree contact with base flows and stream bed provides a broad classification structures. Having considered similarities between types, it suggested following geomorphic are common to all types structures: pool formation; accumulation clasts immediately upstream; buffering against coarsening; bank erosion, causing channel widening formation floodplain channels. changes contribute heterogeneity, potentially creating new niches aquatic organisms such as macroinvertebrates. Moreover, may retain benthic accidentally flushed away during events, serving sources colonists phases recovery. Geomorphic induced also spatial variation rates biogeochemical processing. Accumulation fine sediments some areas provide more surfaces attachment organic matter micro-organisms, hence increasing metabolic rates. Stream scouring lead sediment instability, suppressing growth micro-organisms This article categorized under: Water Life > Conservation, Management, Awareness Science Extremes Engineering Sustainable