Elimination of riverbank protection

Code: 
N11
Sector: 
Hydro Morphology
Other sector(s): 
Urban
The complete description of the NWRM: 
Summary: 

A riverbank protection is an inert or living construction providing bank fixation but also an obstacle for the lateral connection of the river. Eliminating it consists in removing some parts of the bank protection, especially the inert one, in order to enhance lateral connections of the river, diversify flows (depth, substrate, and speed) and habitats, but also cap floods in the mainstream. It is a prerequisite for many other measures like re-meandering or widening, as well as initiating later channel migration and dynamics.

This measure is appropriate and very efficient in impounded large gravel riverbeds where gravel bars are drowned and shallow low-velocity habitats are virtually absent. In these impounded rivers, spawning and nursery habitats like shallow near-bank gravel bars, side channels, and backwaters are often the bottleneck for stream-type specific fish species. River banks have been heavily fixed and the potential for river restoration is limited due to uses like navigation, hydropower or flood protection and mitigation measures are restricted to the river banks.

Illustration(s): 

Destroyed artificial riverbank, (Brasil)

Source: http://echogeo.revues.org/13596?lang=en

 

Possible benefits with level: 
Benefits Levelsort descending
PO10 - Protection of important habitats High
PO11 - Better protection for ecosystems and more use of Green Infrastructure High
PO12 - More sustainable agriculture and forestry High
PO13 - Better management of fish stocks High
PO14 - Prevention of biodiversity loss High
ES7 - Flood risk reduction High
BP3 - Store river water High
BP4 - Slow river water High
PO6 - Improving chemical status Low
PO8 - Prevent groundwater status deterioration Low
BP17 - Absorb and/or retain CO2 Low
PO5 - Improving quantitative status Low
ES6 - Groundwater/aquifer recharge Low
BP1 - Store runoff Low
BP2 - Slow runoff Low
BP5 - Increase evapotranspiration Low
BP6 - Increase infiltration and/or groundwater recharge Low
BP7 - Increase soil water retention Low
PO1 - Improving status of biology quality elements Medium
PO2 - Improving status of physico-chemical quality elements Medium
PO3 - Improving status of hydromorphology quality elements Medium
PO4 - Improving chemical status and priority substances Medium
PO7 - Prevent surface water status deterioration Medium
PO9 - Take adequate and co-ordinated measures to reduce flood risks Medium
ES1 - Water storage Medium
ES2 - Fish stocks and recruiting Medium
ES3 - Natural biomass production Medium
ES4 - Biodiversity preservation Medium
ES8 - Erosion/sediment control Medium
ES9 - Filtration of pollutants Medium
ES10 - Recreational opportunities Medium
ES11 - Aesthetic/cultural value Medium
BP9 - Intercept pollution pathways Medium
BP12 - Create aquatic habitat Medium
BP13 - Create riparian habitat Medium
BP10 - Reduce erosion and/or sediment delivery Medium
Last updated: 09 Jun 2015 | Top