Case study:Beekherstel Buurserbeek: Difference between revisions

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{{Case study status
{{Case study status
|Approval status=Draft
|Approval status=Approved
}}
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{{Location
{{Location
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|Main contact surname=Lenssen
|Main contact surname=Lenssen
|Contact organisation=Waterschap Rijn en Ijssel
|Contact organisation=Waterschap Rijn en Ijssel
|Contact organisation url=https://www.wrij.nl/
|Contact organisation url=www.wrij.nl/
|Multi-site=Yes
|Partner organisations=STOWA,
|Project summary=Het huidig beeld van de Buurserbeek is een langzaam stromende, sterk genormaliseerde beek. De beek ligt voor een deel in agrarisch gebied maar voor een belangrijk deel stroomt de beek ook door bossen of natuurgebieden (Bijvoorbeeld Buurserzand en de bossen ten oosten van Haaksbergen) of is begroeid met houtige gewassen op de oevers. Langs nagenoeg de gehele beek ligt aan weerszijden een 4m breed onderhoudspad en de beek ligt over de gehele lengte tussen kades of hoge gronden. Stroomopwaarts van de Twenteroute heeft de beek heeft nagenoeg het gehele jaar afvoer en op de meeste plekken is de stroomsnelheid nu voldoende voor stroming-minnende soorten. Stroomafwaarts van de Twenteroute valt de afvoer ’s zomers grotendeels weg waardoor de beek stil komt te staan. Het onderhoud is nog intensief op de tracés benedenstrooms van Braambrug.  
|Name of parent multi-site project=Building with Nature measures in streams
De Buurserbeek voldoet nog niet aan de gestelde ecologische doelen. De beek is te diep en er is te weinig structuurvariatie. Nutriëntgehalten zijn ook nog te hoog in de Buurserbeek. Dit wordt voornamelijk veroorzaakt door afwenteling vanuit Duitsland.
|Multi-site=No
|Project picture=Buurserbeek.jpg
|Picture description=Buurserbeek
|Project summary=The Buurserbeek is now a slow-flowing, strongly normalized stream. It is partially located in an agricultural area, but most of the stream flows through woods are natural areas (e.g. Buurserzand and the woods east of Haaksbergen) and/or has woody vegetation on its banks. A 4 meter wide maintenance path runs parallel to most of the stream and the entire stream runs between embankments or high grounds. Upstream of the Twenteroute, the stream carries water most of the year and in most places, the flow velocity is sufficient to support flow-loving fish. Downstream of the Twenteroute, the discharge mostly stops in summer, causing the stream to become stagnant. There is intensive maintenance in the reaches downstream of Braambrug. The Buurserbeek does not yet meet its ecological targets. The stream is too deep and has insufficient variation in structure. Nutrient levels remain to high in the Buurserbeek as well. This is mostly caused by upstream pollution in Germany.


Binnen de kades heeft de beek ruimte voor vrije meandering. De beek is ondiep en breed en heeft een afwisseling van zandbanken en stroomkuilen met dood hout en plaatselijk een weelderige vegetatie van water- en oeverplanten. Het grootste deel, ca. 80% van het beektraject is bebost. De Buurserbeek is geheel optrekbaar voor vis.
The stream can meander freely within its embankments. The stream is shallow and wide and features both sand bars and stream pits, as well as dead wood and a local lush aquatic vegetation. Most of the stream corridor (80%) is wooded. The Buurserbeek is completely accessible to fish.
 
Water authority Rijn en IJssel introduced tree stems into the stream to replace the stone cascades that used to be there. In another stretch of the stream, a maintenance path was removed to make the stream wider and shallower.
|Monitoring surveys and results=The results of dead wood introduction are not yet known. It is clear, though, that they cannot function as cascades. The combined effect of the two measures described above is a greater structure variation and a faster base flow.
|Project title=Beekherstel Buuserbeek
|Project title=Beekherstel Buuserbeek
}}
}}
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{{Case study subcatchment}}
{{Case study subcatchment
|Subcatchment=Schipbeek
}}
{{Site
{{Site
|Name=Buurserbeek
|Name=Buurserbeek
|WFD water body code=NL07_0029
|WFD (national) typology=R5,
|WFD (national) typology=R5,
|Pre-project morphology=Sterk veranderend
|Pre-project morphology=Sterk veranderend
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|Mean discharge category=1 - 10 m³/s
|Mean discharge category=1 - 10 m³/s
|Mn discharge=1.41
|Mn discharge=1.41
|Average channel gradient category=more than 0.1
|Average channel gradient category=Less than 0.001
|Avrg channel gradient=0.74
|Avrg channel gradient=0.00074
|Avrg unit stream power=8.27 * 10^-4
|Avrg unit stream power=8.27 * 10^-4
}}
}}
{{Project background
{{Project background
|Reach length directly affected=16200
|Project started=2015
|Project started=2015
|Works completed=2015/12/31
|Works completed=2015/12/31
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{{Measures
{{Measures
|Bank and bed modifications measure=Vergraven van de oever
|Bank and bed modifications measure=Vergraven van de oever
|Other technical measure=Dood hout inbreng
|Floodplain / River corridor=Dood hout inbreng,
}}
}}
{{Hydromorphological quality elements header}}
{{Hydromorphological quality elements header}}
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
}}
{{Biological quality element table row
{{Biological quality element table row
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
}}
{{Physico-chemical quality element table row
{{Physico-chemical quality element table row
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
}}
{{Physico-chemical quality element table row
{{Physico-chemical quality element table row
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
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{{Physico-chemical quality element table row
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
}}
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|Quantitative monitoring=No
|Quantitative monitoring=No
|Control site used=No
|Control site used=No
|Result=Improvement
}}
}}
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Latest revision as of 14:28, 31 March 2021

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Location: 52° 8' 10.28" N, 6° 42' 34.15" E
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Project overview

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Status Complete
Project web site
Themes Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Monitoring
Country Netherlands
Main contact forename John
Main contact surname Lenssen
Main contact user ID
Contact organisation Waterschap Rijn en Ijssel
Contact organisation web site http://www.wrij.nl/
Partner organisations STOWA
Parent multi-site project

Building with Nature measures in streams

This is a parent project
encompassing the following
projects 		No
Buurserbeek

Project summary

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The Buurserbeek is now a slow-flowing, strongly normalized stream. It is partially located in an agricultural area, but most of the stream flows through woods are natural areas (e.g. Buurserzand and the woods east of Haaksbergen) and/or has woody vegetation on its banks. A 4 meter wide maintenance path runs parallel to most of the stream and the entire stream runs between embankments or high grounds. Upstream of the Twenteroute, the stream carries water most of the year and in most places, the flow velocity is sufficient to support flow-loving fish. Downstream of the Twenteroute, the discharge mostly stops in summer, causing the stream to become stagnant. There is intensive maintenance in the reaches downstream of Braambrug. The Buurserbeek does not yet meet its ecological targets. The stream is too deep and has insufficient variation in structure. Nutrient levels remain to high in the Buurserbeek as well. This is mostly caused by upstream pollution in Germany.

The stream can meander freely within its embankments. The stream is shallow and wide and features both sand bars and stream pits, as well as dead wood and a local lush aquatic vegetation. Most of the stream corridor (80%) is wooded. The Buurserbeek is completely accessible to fish.

Water authority Rijn en IJssel introduced tree stems into the stream to replace the stone cascades that used to be there. In another stretch of the stream, a maintenance path was removed to make the stream wider and shallower.

Monitoring surveys and results

Edit project overview to modify the Monitoring survey and results.


The results of dead wood introduction are not yet known. It is clear, though, that they cannot function as cascades. The combined effect of the two measures described above is a greater structure variation and a faster base flow.

Lessons learnt

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Catchment and subcatchment

Catchment

River basin district Rijn
River basin Rijndelta

Subcatchment

River name Schipbeek
Area category 100 - 1000 km²
Area (km2)
Maximum altitude category Less than 100 m
Maximum altitude (m) 2323 m <br />0.023 km <br />2,300 cm <br />
Dominant geology Siliceous
Ecoregion Central Plains
Dominant land cover Intensive agriculture (arable), Plantation forestry, Grassland
Waterbody ID NL07_0028



Other case studies in this subcatchment: Beekherstel Zuidelijk Afwateringskanaal, Traditioneel Beekherstel Koffiegoot


Site

Name Buurserbeek
WFD water body codes NL07_0029
WFD (national) typology R5
WFD water body name
Pre-project morphology Sterk veranderend
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
Dominant hydrology Artificially regulated
Dominant substrate Sand, Musselkalk, dekzand/keileem
River corridor land use Intensive agriculture (arable), Plantation forestry
Average bankfull channel width category 5 - 10 m
Average bankfull channel width (m) 66 m <br />0.006 km <br />600 cm <br />
Average bankfull channel depth category 0.5 - 2 m
Average bankfull channel depth (m) 0.80.8 m <br />8.0e-4 km <br />80 cm <br />
Mean discharge category 1 - 10 m³/s
Mean annual discharge (m3/s) 1.411.41 m³/s <br />1,410 l/s <br />
Average channel gradient category Less than 0.001
Average channel gradient 0.00074
Average unit stream power (W/m2) 8.27 * 10^-4 "*10^-4" is not declared as a valid unit of measurement for this property.


Project background

Reach length directly affected (m)
Project started 2015
Works started
Works completed 2015/12/31
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

Mitigation of a pressure Barriers to fish migration
Hydromorphology Flow velocities, Width & depth variation
Biology Fish, Invertebrates
Physico-chemical Temperature, PH, Oxygen balance, Nutrient concentrations
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Vergraven van de oever
Floodplain / River corridor Dood hout inbreng
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
Substrate conditions Yes Yes No No No Improvement
Flow velocities Yes Yes No No No Improvement
Width & depth variation Yes Yes No No No Improvement

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Fish Yes Yes No No No Improvement
Invertebrates Yes Yes No No No Improvement

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Temperature Yes Yes No No No Improvement
PH Yes Yes No No No Improvement
Oxygen balance Yes Yes No No No Improvement
Nutrient concentrations Yes Yes No No No Improvement

Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Concentration phosphate, Chloride and Nitrogen Yes Yes No No No Improvement


Monitoring documents



Additional documents and videos


Additional links and references

Link Description

Supplementary Information

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