Case study:Aaijen- Removal of bank fixation

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Location: 51° 34' 52", 6° 2' 26"
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Project overview

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Status Complete
Project web site
Themes Flood risk management, Monitoring, Water quality
Country Netherlands
Main contact forename Frans
Main contact surname Kerkum
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
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Monitoring surveys and results

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Catchment and subcatchment

Catchment

River basin district Meuse
River basin Meuse

Subcatchment

River name Meuse
Area category more than 10000 km²
Area (km2) 465
465 km²
46,500 ha
Maximum altitude category 100 - 200 m
Maximum altitude (m) 200
200 m
0.2 km
20,000 cm
Dominant geology chalk and loess
Ecoregion Western Plains
Dominant land cover Intensive agriculture, Urban
Waterbody ID



Other case studies in this subcatchment: Meers - Floodplain lowering, Reméandration du Geer à Grand-Axhe, Rijkelse Bemden - River bed widening, Tungelroyse beek, Voorste Nete at Dessel


Site

Name Aijen
WFD water body codes
WFD (national) typology R7
WFD water body name
Pre-project morphology Straight, High width:depth
Reference morphology Single channel, Sinuous
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 Silt, Sand
River corridor land use Urban, Intensive 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) 400 m
0.4 km
40,000 cm
Project started 2005/01/01
Works started 2005/01/01
Works completed 2006/01/01
Project completed
Total cost category 50 - 100 k€
Total cost (k€) 74 k€
74,000 €
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 Continuity for organisms
Biology Macrophytes, Invertebrates: Taxonomic composition, Invertebrates: Abundance
Physico-chemical
Other reasons for the project Landscape enhancement, Nature development, Flood risk management, Bank erosion


Measures

Structural measures
Bank/bed modifications Removal of bank reinforcements
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
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
Continuity for organisms Yes Yes Yes Improvement

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Macrophytes Yes Yes Improvement
Invertebrates: Taxonomic composition Yes Improvement
Invertebrates: Abundance

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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