Case study:Amerongse Bovenpolder

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Location: 51° 59' 40.39" N, 5° 28' 15.67" 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	Wim
Main contact surname	Zeeman
Main contact user ID
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

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Project summary

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This project aims to improve biodiversity, function as a green corridor, maintain and improve landscape, recreation and cultural-historical values. The work here involved the creation of a 1 ha. swamp, 6,3 ha. of fish spawning and a 6km long seepage gully. 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

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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

Supplementary Information

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