Difference between revisions of "Rijkelse Bemden - River bed widening"
(→Measures selection) |
(→Site description) |
||
| Line 11: | Line 11: | ||
==Site description== | ==Site description== | ||
The area of Rijkelse Bemden is situated along the river Meuse and is an area that historically consisted of two river terraces. The area was predominantly used as grassland with a low-intensity agricultural purpose. Parts of the area were used for as an orchard. Around 1950 the Meuse was straightened and canalized in this region. As a result a number of gravel bars and small islands which were previously present in the channel and floodplain area disappeared. The banks of the river were also fixated. | The area of Rijkelse Bemden is situated along the river Meuse and is an area that historically consisted of two river terraces. The area was predominantly used as grassland with a low-intensity agricultural purpose. Parts of the area were used for as an orchard. Around 1950 the Meuse was straightened and canalized in this region. As a result a number of gravel bars and small islands which were previously present in the channel and floodplain area disappeared. The banks of the river were also fixated. | ||
| − | From 1965 to 1985 the area was used as a source of sand and gravel and was mined intensively. This led to a | + | From 1965 to 1985 the area was used as a source of sand and gravel and was mined intensively. This led to a lake forming in the area which filled up with water. The banks of the lake have been used from 1985 onward as low-intensive agricultural land. |
==Measures selection== | ==Measures selection== | ||
Revision as of 13:35, 24 June 2010
Rijkelse Bemden - River bed widening
Key features of the case study
Site description
The area of Rijkelse Bemden is situated along the river Meuse and is an area that historically consisted of two river terraces. The area was predominantly used as grassland with a low-intensity agricultural purpose. Parts of the area were used for as an orchard. Around 1950 the Meuse was straightened and canalized in this region. As a result a number of gravel bars and small islands which were previously present in the channel and floodplain area disappeared. The banks of the river were also fixated. From 1965 to 1985 the area was used as a source of sand and gravel and was mined intensively. This led to a lake forming in the area which filled up with water. The banks of the lake have been used from 1985 onward as low-intensive agricultural land.
Measures selection
In 1996 the area was designated as a nature area and natural development was started on the spit between the river channel and the lake.
Success criteria
Ecological response
Hydromorphological response
Monitoring before and after implementation of the project
Socio-economic aspects
Ecosystem goods & services
Gravel, sand and clay mining (historical).
Synergies and conflicts
The project was carried out to increase the room for the river and thereby improve flood protection during high discharges. At the same time the clay and sand that was taken from the river bed widening was used in the banks of the Rijkelse Bemden. Locally it was also used to shallow the ponds in the area.
Costs
The total project of the river bed widening and restoration of the Rijkelse Bemden was estimated to cost 13 million euro.
Contact person within the organization
Extra background information
References
Related Measures
- Link flood reduction with ecological restoration
- Widen water courses
- Shallow water courses
- Allow/increase lateral channel migration or river mobility
- Recreate gravel bar and riffles
- Adjust land use to develop riparian vegetation
- Adjust land use to reduce nutrient, sediment input or shore erosion
- Lower river banks or floodplains to enlarge inundation and flooding
- Set back embankments, levees or dikes
- Retain floodwater
