General National Id Netherlands_01 Site name Rivierengebied Summary This example is one of many schemes being implemented through the national 'Room for the River' programme in the Netherlands. This particular measure involves setting back the dyke of the River Waal, and incorporating a new channel in to the expanded area of floodplain that can take additional flood flow from the Waal. The measures are also incorporated with a new area of urban development and will create an urban river park within the city of Nijmegen. Light or indepth? In-depth The in-depth description of the case study cs-nl-01-final_version.pdf NUTS Code Gelderland RBD code NLRN Transboundary 0 Data provider Heather Williams and Dilian Jansen, AMEC Source(s) Dijkteruglegging Lent NWRM(s) implemented in the case study Floodplain restoration and management Longitude 5.862 Latitude 51.856 Site information Climate zone cool temperate moist Mean annual rainfall 600 - 900 mm Mean rainfall unit mm/year Type Case Study Info Performance Performance impact estimation method Laboratory Performance impact estimation information Monitoring is carried out of river flows in the Waal. The measure has been modelled prior to implementation, consistently with all schemes in the Room for the River programme: this has allowed the performance of the whole Room for the River programme to be assessed, not only this individual scheme. Design & implementations Application scale River Installation date 2016 Performance timescale < 1 year Constraints This type of measure is suitable for rivers with permanent flow where the capacity to flow out-of-bank is currently restricted. There are no specific basin characteristics that are necessary, as the measures could be applied in a range of situations. Favourable preconditions The availability of open space in between the current river bank and the town. The sharp meander in the river provided a suitable geometry for addition of this type of measure Public consultation 1 Design contractual arrangement Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Extensive public communication for the national programme as a whole, as well as locally for this specific measure Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments National water authority Financing Rijkswaterstaat Financing Implementation Gemeente Nijmegen Direct overall project responsibility Implementation Ministerie van Infrastructuur en Milieu Involved directly in planning and execution of infrastructural changes Determination of design details of the measure Staatsbosbeheer Involved in the planning and development of recreational and nature aspects on the future island Lessons, risks, implications... Key lessons The ability to have an influence at a large scale, particularly in the lower reaches of a major river basin, requires commitment at high levels of government. This is the case with the Room for the River programme. The integration of this particular scheme in to a wider programme with an overall goal ensures that individual measures do not adversely affect flood vulnerability in down- or upstream locations or in other river basins, and that the combination of individual measures leads to a cumulative, quantifiable positive effect on flood risk. Success factor(s) Success factor type Success factor role Comments Attitude of decision makers main factor Financing possibilities main factor Financing Financing type Comments National funds Funded by the national government Barrier Barrier type Barrier role Comments Attitude of relevant stakeholders main barrier Attitude of people who owned, farmed or lived on the land that is being used for the scheme Driver Driver type Driver role Comments Past flooding events main driver Flooding events in 1993 and 1995 led to the development of the national Room for the River programme Organisation committed to it main driver The national government decided on this approach and has led and funded its implementation Financing share Financing share type Share Comments Policy, general governance and design targets Policy description Addressing the risk of flooding from the River Waal, particularly following flooding events in 1993 and 1995. This is part of a national programme of work by the national government to make 'Room for the River'. Part of wider plan 1 Policy target Target purpose Peak-flow reduction Increase Water Storage Oher Societal Benefits Policy pressure Pressure directive Relevant pressure Policy area Policy area type Policy area focus Name Comments Policy impact Impact directive Relevant impact Policy wider plan Wider plan type Wider plan focus Name Comments National Water Room for the River programme National strategy to create more space for flooding, rather than raising dykes further, initiated following widespread flooding in 1993 and 1995 National Water FloodResilienCity (FRC) INTERREG IVB programme enabling public authorities in eight cities in North West Europe to better cope with urban flooding. Nijmegen is one of the eight cities Policy requirement directive Requirement directive Specification Socio-economic Costs investment 351000000 Compensations annual information Compensation is required to owners and occupiers of the land that will be used for the measures, who will be displaced. Information on Ecosystem improved biodiversity Provision of increased aquatic and riparian habitat along the edges of the new channel Ecosystem impact climate regulation No specific impact Biophysical impacts Information on Peak flow rate reduction The measure provides a 35 cm reduction in design flood peak height on the River Waal. Information on Increased groundwater level Groundwater levels can already be high in this area, causing groundwater seepage. It was a specific aim of the project to ensure that groundwater seepage did not increase. Water quality overall improvements Not relevant for this application Soil quality overall soil improvements Not relevant for this application Information on Effect delaying peak In addition to reducing peak height, the measure is also likely to delay the peak, although no quantification was available Full Context Collection(aka Doorway or Gallery) Case Studies Pathway(aka Context) Default view Area(aka Level or Site) ALL