Case study:Bijloop: Difference between revisions
Jump to navigation
Jump to search
Bas Wullems (talk | contribs) No edit summary |
Bas Wullems (talk | contribs) No edit summary |
||
| Line 16: | Line 16: | ||
|Name of parent multi-site project=Building with nature measures in streams | |Name of parent multi-site project=Building with nature measures in streams | ||
|Multi-site=No | |Multi-site=No | ||
|Project summary=The Bijloop-Turfvaart stream system has been heavily modified for peat transport in the 15th century. Since then, it has been optimized for agricultural purposes. The low flow velocity, high water temperature and nutrient load cause a generally unfavourable ecological environment. The water authority has | |Project summary=The Bijloop-Turfvaart stream system has been heavily modified for peat transport in the 15th century. Since then, it has been optimized for agricultural purposes. The low flow velocity, high water temperature and nutrient load cause a generally unfavourable ecological environment. The water authority has experimented with removing fewer water plants. To this end, they planted trees lining the stream. Various species were used: black alder, summer oak, hazel, rowan, blackthorn, ash and buckthorn. | ||
|Monitoring surveys and results=In the beginning of the project the stream discharge was too low, so that sludge and leaves piled up in the bed. This caused a high biological oxygen demand and consequently a low oxygen level. As the project developed, a continuous vegetation cover developed, making mowing unnecessary. Black alder and hazel proved especially suitable, since they grow fast. Oxygen levels have become more stable and nutrient runoff into the stream has decreased. | |Monitoring surveys and results=In the beginning of the project the stream discharge was too low, so that sludge and leaves piled up in the bed. This caused a high biological oxygen demand and consequently a low oxygen level. As the project developed, a continuous vegetation cover developed, making mowing unnecessary. Black alder and hazel proved especially suitable, since they grow fast. Oxygen levels have become more stable and nutrient runoff into the stream has decreased. | ||
|Lessons learn=Flow dynamics are important to the success of stream-parallel vegetation planting. In streams with a low discharge, fallen trees and leaves can cause backwater effects and obstruction. If a high flow velocity can be maintained, this will not tend to be a problem. If vegetation does not develop quickly enough, there is a risk of bank instability. | |Lessons learn=Flow dynamics are important to the success of stream-parallel vegetation planting. In streams with a low discharge, fallen trees and leaves can cause backwater effects and obstruction. If a high flow velocity can be maintained, this will not tend to be a problem. If vegetation does not develop quickly enough, there is a risk of bank instability. | ||
Revision as of 12:50, 3 December 2020
This case study is pending approval by a RiverWiki administrator.
Location: 51° 32' 34.38" N, 4° 42' 24.91" E
Left click to look around in the map, and use the wheel of your mouse to zoom in and out.
Project overview
| Status | Complete |
|---|---|
| Project web site | |
| Themes | Environmental flows and water resources, Habitat and biodiversity, Water quality |
| Country | Netherlands |
| Main contact forename | Martin |
| Main contact surname | Stamhuis |
| Main contact user ID | |
| Contact organisation | Waterschap Brabantse Delta |
| Contact organisation web site | http://www.brabantsedelta.nl |
| Partner organisations | |
| Parent multi-site project | |
| This is a parent project encompassing the following projects |
No |
This case study hasn’t got a picture, you can add one by editing the project overview.
Project summary
Edit project overview to modify the project summary.
The Bijloop-Turfvaart stream system has been heavily modified for peat transport in the 15th century. Since then, it has been optimized for agricultural purposes. The low flow velocity, high water temperature and nutrient load cause a generally unfavourable ecological environment. The water authority has experimented with removing fewer water plants. To this end, they planted trees lining the stream. Various species were used: black alder, summer oak, hazel, rowan, blackthorn, ash and buckthorn.
Monitoring surveys and results
Edit project overview to modify the Monitoring survey and results.
In the beginning of the project the stream discharge was too low, so that sludge and leaves piled up in the bed. This caused a high biological oxygen demand and consequently a low oxygen level. As the project developed, a continuous vegetation cover developed, making mowing unnecessary. Black alder and hazel proved especially suitable, since they grow fast. Oxygen levels have become more stable and nutrient runoff into the stream has decreased.
Lessons learnt
Edit project overview to modify the lessons learnt.
Flow dynamics are important to the success of stream-parallel vegetation planting. In streams with a low discharge, fallen trees and leaves can cause backwater effects and obstruction. If a high flow velocity can be maintained, this will not tend to be a problem. If vegetation does not develop quickly enough, there is a risk of bank instability.
Image gallery
|
Catchment and subcatchment
Site
Project background
Cost for project phases
Reasons for river restoration
Measures
MonitoringHydromorphological quality elements
Biological quality elements
Physico-chemical quality elements
Any other monitoring, e.g. social, economic
Monitoring documents
Additional documents and videos
Additional links and references
Supplementary InformationEdit Supplementary Information
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||