Case study:Beneden-Leeuwen-Side channel

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Location: 51° 53' 19", 5° 31' 41"
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Project overview

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Status Complete
Project web site
Themes Habitat and biodiversity, Monitoring, Water quality
Country Netherlands
Main contact forename Rogier
Main contact surname Vogelij
Main contact user ID
Contact organisation Rijkswaterstaat
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
Ecological benefits of side channels presentation, M. Schoor (2010)

Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

Catchment

River basin district Rhine
River basin Millingerwaard

Subcatchment

River name Waal
Area category more than 10000 km²
Area (km2)
Maximum altitude category 100 - 200 m
Maximum altitude (m)
Dominant geology Calcareous
Ecoregion Central Plains
Dominant land cover Extensive agriculture, Urban
Waterbody ID



Other case studies in this subcatchment: Buiten Ooij, Millingerwaard-Floodplain rehabilitation, Opijnen- Side channel


Site

Name Beneden-Leeuwen
WFD water body codes
WFD (national) typology R7
WFD water body name
Pre-project morphology Single channel, Straight, Sinuous, High width:depth
Reference morphology Single channel, Revetments
Desired post project morphology
Heavily modified water body true
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate Sand, Clay
River corridor land use Urban, Extensive agriculture
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category 5 - 10 m
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

Reach length directly affected (m) 1000
1,000 m
1 km
100,000 cm
Project started 1994/01/01
Works started 1994/01/01
Works completed 1997/01/01
Project completed
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design
Stakeholder engagement and communication
Works and works supervision
Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure
Hydromorphology Quantity & dynamics of flow, Continuity for organisms
Biology Macrophytes, Invertebrates, Fish: Age structure
Physico-chemical
Other reasons for the project Landscape enhancement


Measures

Structural measures
Bank/bed modifications Bank reprofiling
Floodplain / River corridor
Planform / Channel pattern Side channel created, Creation of backwater
Other
Non-structural measures
Management interventions More natural water retention
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Macrophytes Yes Yes Yes Improvement
Invertebrates Yes Yes Yes Improvement
Fish: Age structure Yes Yes Yes Improvement

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



Additional documents and videos


Additional links and references

Link Description

Supplementary Information

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