Case study:Hooge Raam

Project overview

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Status	Complete
Project web site
Themes	Hydromorphology
Country	Netherlands
Main contact forename	Bram
Main contact surname	Spierings
Main contact user ID
Contact organisation	Waterschap Aa en Maas
Contact organisation web site	http://www.aaenmaas.nl
Partner organisations
Parent multi-site project	Case_study:Building with Nature
This is a parent project encompassing the following projects	No

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Project summary

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Building with nature measures in streams The Hooge Raam is a tributary of the Lage Raam stream. It is a fast-flowing stream in a mostly natural area. After deepening and weir construction, the waterway had become too wide and too deep for its discharge. Fifteen years ago, maintenance was suspended. A new bed was dug out, in which the stream was allowed to meander. In parts of the stream, dead branches and trunks were introduced. In other parts, trees were planted along the banks to provide shade.

Monitoring surveys and results

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The outlet of the stream has become richer in great manna grass and sludge. The stream remains within its planned meandering zone. The lower temperature proves suitable for species that prefer higher flow velocities, like fish and dragonflies.

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Location: 51° 43' 22.58" N, 5° 42' 25.45" E

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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 Meuse River basin Maas Subcatchment River name Oeffeltsche Raam Area category 100 - 1000 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) Dominant geology Siliceous Ecoregion Western Plains Dominant land cover Intensive agriculture (arable), Grassland, Broadleaf/mixed woodland (semi natural) Waterbody ID NL38_8P, NL38_8I Other case studies in this subcatchment: Beek Lage Raam, Beekherstel Lactariabeek, Lactariabeek, Oeffeltse Raam, Tovensche Beek Site Edit site Name Hooge Raam WFD water body codes NL38_8F WFD (national) typology R14 WFD water body name Halsche Beek en Hooge Raam Pre-project morphology Actively meandering Reference morphology Over deepened Desired post project morphology Actively meandering 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 Dominant substrate Sand River corridor land use Intensive agriculture (arable) Average bankfull channel width category 5 - 10 m Average bankfull channel width (m) 77 m <br />0.007 km <br />700 cm <br /> Average bankfull channel depth category Less than 0.5 m Average bankfull channel depth (m) 0.30.3 m <br />3.0e-4 km <br />30 cm <br /> Mean discharge category 0.1 - 1.0 m³/s Mean annual discharge (m3/s) 0.20.2 m³/s <br />200 l/s <br /> Average channel gradient category 0.001 - 0.01 Average channel gradient 0.0018 Average unit stream power (W/m2) 0.504360.504 W/m² <br /> Project background Edit project background Reach length directly affected (m) Project started 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures 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 Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative 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