Case study:Opijnen- Side channel

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Location: 51° 49' 34.32" N, 5° 18' 39.60" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Monitoring, Water quality
Country	Netherlands
Main contact forename	Rijkswaterstaat
Main contact surname	Rijkswaterstaat
Main contact user ID
Contact organisation	Rijkswaterstaat
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Arial photo courtesy of Rijkswaterstaat

Project summary

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REFORM offers more science oriented information at http://wiki.reformrivers.eu/index.php/Opijnen_-_Side_Channel

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Rhine River basin Millingerwaard Subcatchment River name Waal Area category more than 10000 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) Dominant geology Calcareous Ecoregion Central Plains Dominant land cover Extensive agriculture, Urban Waterbody ID Other case studies in this subcatchment: Beneden-Leeuwen-Side channel, Buiten Ooij, Millingerwaard-Floodplain rehabilitation Site Edit site Name Opijnen WFD water body codes WFD (national) typology R7 WFD water body name Pre-project morphology Single channel, High width:depth Reference morphology 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 Tidal, Estuary Dominant substrate Gravel River corridor land use Urban Average bankfull channel width category 10 - 50 m Average bankfull channel width (m) Average bankfull channel depth category more than 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 Edit project background Reach length directly affected (m) 1000 m1 km <br />100,000 cm <br /> Project started 1994/01/01 Works started 1994/01/01 Works completed 1994/01/01 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Quantity & dynamics of flow, Flow velocities, Continuity of sediment transport Biology Fish: Species composition, Fish: Abundance, Fish: Disturbance-sensitive species, Fish: Age structure, Invertebrates, Macrophytes Physico-chemical Nutrient concentrations Other reasons for the project Landscape enhancement Measures Edit Measures Structural measures Bank/bed modifications Improvement of natural flows Floodplain / River corridor Planform / Channel pattern Creation of side channel Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Flow velocities Yes Yes Improvement Quantity & dynamics of flow Yes Yes Improvement Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Invertebrates Yes Yes Yes No change Fish: Species composition Yes Yes Yes No change Fish: Disturbance-sensitive species Yes Yes Yes No change Fish: Abundance Yes Yes Yes No change Fish: Age structure Yes Yes Yes No change Macrophytes Yes Yes Yes No change Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information