Case study:Lek Bij Everdingen

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Location: 51° 58' 4.80" N, 5° 10' 26.40" 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	M
Main contact surname	Greijdanus-Klass
Main contact user ID
Contact organisation	Rijkswaterstaat Waterdienst
Contact organisation web site	http://www.rijkswaterstaat.nl/over ons/adressen en diensten/landelijkediensten/waterdienst/
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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Catchment

River basin district	Rhine
River basin	Lek

Subcatchment

River name	Lek
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	Grassland, Urban
Waterbody ID

Site

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Name	Lek Everdingen
WFD water body codes
WFD (national) typology	R7
WFD water body name
Pre-project morphology	Single channel, Straight
Reference morphology
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	Tidal, Estuary
Dominant substrate	Gravel, Silt
River corridor land use	Urban, Extensive agriculture
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
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)	700 m0.7 km <br />70,000 cm <br />
Project started
Works started	2005/01/01
Works completed	2006/01/01
Project completed
Total cost category	100 - 500 k€
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			Rijkswaterstaat Waterdienst
Stakeholder engagement and communication			Rijkswaterstaat Waterdienst
Works and works supervision
Post-project management and maintenance			Rijkswaterstaat Waterdienst
Monitoring	100 - 500 k€		Rijkswaterstaat Waterdienst

Reasons for river restoration

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Mitigation of a pressure	Navigation, Channelising of the river
Hydromorphology	Quantity & dynamics of flow, Flow velocities, Continuity for organisms
Biology	Invertebrates, Macrophytes, Fish: Abundance
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Introduction of coil rolls to protect groynes
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
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
Invertebrates	Yes	Yes		Yes		Inconclusive
Macrophytes	Yes	Yes		Yes		Inconclusive
Fish: Abundance	Yes	Yes		Yes		Inconclusive

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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