Coarse woody debris

Code: 
F10
Sector: 
Forest
Other sector(s): 
Agriculture
Urban
Hydro Morphology
The complete description of the NWRM: 
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): 
Possible benefits with level: 
Benefits Levelsort descending
BP4 - Slow river water High
BP12 - Create aquatic habitat High
ES2 - Fish stocks and recruiting High
ES4 - Biodiversity preservation High
BP3 - Store river water Low
BP10 - Reduce erosion and/or sediment delivery Low
ES8 - Erosion/sediment control Low
BP13 - Create riparian habitat Medium
ES7 - Flood risk reduction Medium
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
Last updated: 10 Jun 2015 | Top