Code F10 Year of Issue none Sector Forest Other sector(s) Agriculture Urban Hydro Morphology The complete description of the NWRM f10_-_coarse_woody_debris.pdf Summary Coarse woody debris in stream channels has multiple ecological and hydrologic benefits. Coarse woody debris consists of large sections of deadfall: tree stems or stumps that either fall into or are deliberately placed in streams. Coarse woody debris can be deployed with varying degrees of naturalness. At one extreme, coarse woody debris can be used to form coffer or placer dams which effectively limit water flow. At the other extreme, natural deadfall coarse woody debris is found when riparian trees are allowed to fall naturally into streams. Coarse woody debris will generally slow water flow velocity and can reduce the peak of flood hydrographs. In addition to its role in slowing streamflow and facilitating sediment accumulation, coarse woody debris can improve aquatic biodiversity by retaining food and providing additional habitat, such as refuges and spawning sites. Illustration(s) River with coarse woody debrisSource: http://www.sitatrust.org.uk/projects/can-we-save-the-native-crayfish Possible benefits with level Benefits Level BP3 - Store river water Low BP4 - Slow river water High BP10 - Reduce erosion and/or sediment delivery Low BP12 - Create aquatic habitat High BP13 - Create riparian habitat Medium ES2 - Fish stocks and recruiting High ES4 - Biodiversity preservation High ES7 - Flood risk reduction Medium ES8 - Erosion/sediment control Low ES10 - Recreational opportunities Medium PO1 - Improving status of biology quality elements Medium PO9 - Take adequate and co-ordinated measures to reduce flood risks Medium PO10 - Protection of important habitats Medium PO11 - Better protection for ecosystems and more use of Green Infrastructure Medium PO13 - Better management of fish stocks Medium PO14 - Prevention of biodiversity loss Medium Case study(ies) Slowing the Flow at Pickering, UK Rural runoff attenuation in the Belford catchment, UK Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL Crosslinks Pair Record Coarse woody debris to slow streamflow Destination Context NSWRM(Sections) - Default view - ALL - 7472 Crosslink Type Proximity with