Case study:Beekherstel Zuidelijk Afwateringskanaal

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Location: 52° 10' 46.91" N, 6° 31' 44.65" E
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Project overview

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Status In progress
Project web site
Themes 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

This is a parent project
encompassing the following
projects
No
Capelle Sluisbrug over het Zuidelijke Afwateringskanaal

Project summary

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The Zuidelijk Afwateringskanaal water body is classified under the WFD system as M1a: buffered ditches. The entire water body is managed by water authority Rijn en IJssel. The Zuidelijk Afwateringskanaal is partly located in the province of Gelderland (municipality Berkelland) and partly in the province of Overijssel (municipality Hof van Twente). The water body is 10.7 km long and has a catchment of 4449 hectares. The Zuidelijks Afwateringskanaal is an engineered waterway. It discharges into the Twentekanaal. Water levels are managed with four adjustable weirs (one automatic) and five fixed weirs. None of these weirs are passable for fish. In this water body, a single minimal water level is pursued for each managed stretch, for which the weirs are used. The water body does not carry water all year long. In dry periods, the 24 upstream stretches of the water body run dry. The Zuidelijk Afweteringskanaal is mostly there for drainage. Water is being let into the water body from the Bolksbeek in dry periods. There are no sewage treatment plants present in this catchment.

The water authority adapted its mowing regime in this stream to main channel mowing, mainly to get more experience with this vegetation removal strategy.

Monitoring surveys and results

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Backwater effects and vegetation regrowth are being monitored. Results are not yet known.

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 Buurserbeek, Traditioneel Beekherstel Koffiegoot


Site

Name Zuidelijke Afwateringskanaal
WFD water body codes NL07_0026
WFD (national) typology M1a
WFD water body name
Pre-project morphology Artificial channel
Reference morphology
Desired post project morphology
Heavily modified water body No
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest
Dominant hydrology
Dominant substrate Sand
River corridor land use Grassland, Irrigated land, Plantation forestry
Average bankfull channel width category 2 - 5 m
Average bankfull channel width (m) 3.913.91 m <br />0.00391 km <br />391 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) 1.941.94 m³/s <br />1,940 l/s <br />
Average channel gradient category Less than 0.001
Average channel gradient 0.00045
Average unit stream power (W/m2) 2.18964475703322.19 W/m² <br />


Project background

Reach length directly affected (m)
Project started 2017
Works started
Works completed
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
Hydromorphology Width & depth variation, Flow velocities, Continuity for organisms
Biology Fish, Invertebrates
Physico-chemical Oxygen balance, PH, Temperature
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Stroombaanmaaien
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
Width & depth variation Yes Yes No No No Improvement
Flow velocities Yes Yes No No No Improvement
Substrate conditions 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
Oxygen balance Yes Yes No No No Improvement
PH Yes Yes No No No Improvement
Temperature 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



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Additional links and references

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Supplementary Information

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