Case study:Beneden-Leeuwen-Side channel

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Location: 51° 53' 18.60" N, 5° 31' 41.12" E

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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

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Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this 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

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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

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Reach length directly affected (m)	1000 m1 km <br />100,000 cm <br />
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

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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

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

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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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

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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

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

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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