Case study:Amerongse Bovenpolder

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Location: 51° 59' 26.69" N, 5° 27' 46.93" E

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Project overview

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Status	In progress
Project web site
Themes	Habitat and biodiversity, Social benefits
Country	Netherlands
Main contact forename	Jaring
Main contact surname	van Rooijen
Main contact user ID	User:InfoMan
Contact organisation	Dienst Landelijk Gebied
Contact organisation web site	http://www.dienstlandelijkgebied.nl/en
Partner organisations	Rijkswaterstaat
Parent multi-site project
This is a parent project encompassing the following projects	No

Amerongse Bovenpolder seen from its northern edge, looking southward.

Project summary

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The Amerongse Bovenpolder project aims to improve biodiversity, function as a green corridor, maintain and improve landscape, and to improve conditions for recreation and cultural-historical values. The work here involved the creation of a 1 ha. swamp, 6,3 ha. of fish spawning area and a 6km long seepage gully (yet to be constructed). The polder has been previously used as a landfill, for sand excavation, and tabacco cultivation.

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	Rhine

Subcatchment

River name	Rhine
Area category	1000 - 10000 km²
Area (km2)
Maximum altitude category	1000 - 2000 m
Maximum altitude (m)
Dominant geology	Siliceous
Ecoregion	Central Plains
Dominant land cover	Grassland, Urban
Waterbody ID

Other case studies in this subcatchment: Bakenhof Dyke reconstruction, Blauwe Kamer, Room for the River, Ruppoldingen, Upper Main catchment restoration

Site

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Name	Amerongse Bovenpolder
WFD water body codes
WFD (national) typology	R7
WFD water body name
Pre-project morphology	Plane bed
Reference morphology
Desired post project morphology
Heavily modified water body	Yes
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest	oyster catchers, Plover (Charadrius sp.), common redshank, Black-tailed Godwit, Common Snipe
Dominant hydrology
Dominant substrate	Clay
River corridor land use	Intensive agriculture (arable)
Average bankfull channel width category	more than 50 m
Average bankfull channel width (m)	170170 m <br />0.17 km <br />17,000 cm <br />
Average bankfull channel depth category	2 - 5 m
Average bankfull channel depth (m)
Mean discharge category	100 - 1000 m³/s
Mean annual discharge (m3/s)	500500 m³/s <br />500,000 l/s <br />
Average channel gradient category	Less than 0.001
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	14001,400 m <br />1.4 km <br />140,000 cm <br />
Project started	2001/01/01
Works started
Works completed
Project completed
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources	Rijkswaterstaat, Dienst Landelijk Gebied

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
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications
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

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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The management plan 2011-2021 for the Amerongse Bovenpolder and the Amerongs bos

Additional links and references

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Link	Description
http://http://www.dienstlandelijkgebied.nl/xmlpages/page/dlg/actueel/nieuwsitem/nieuwsbericht/2015821	DLG webpage on background Amerongse Bovenpolder (Dutch)
http://www.rijkswaterstaat.nl/water/plannen en projecten/vaarwegen/nederrijn/amerongse bovenpolder/	Rijkswater webpage on goals, planning and background Amerongse Bovenpolder (Dutch)

Supplementary Information

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