General National Id Lux_03 Site name Alzette river restoration in the 'Am Brill' nature reserve in Schifflange Summary The Alzette river (Luxembourg) restoration project aimed at erasing the effect of the river chanelling, which caused the river uniformisation and an ecological impoverishment. The project consisted in a remeandering, increase of the base level of the river, widening of the riverbed, reconnection of the river to existing ponds and creation of a new pond. Light or indepth? Light NUTS Code Luxembourg RBD code LU RB_000 Transboundary 0 NWRM(s) implemented in the case study Re-meandering Longitude 6.007891 Latitude 49.509026 Site information Climate zone cool temperate moist Mean rainfall 853 Mean rainfall unit mm/year Average temperature 9.2 Type Case Study Info Performance Performance impact estimation method Unknown Design & implementations Application scale Field Scale Performance timescale < 1 year Size 700 Size unit m Design capacity description The project was designed to restore the natural functioning of the river. Constraints No main constrain identified. Design contractual arrangement Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments Local water authority Initiation of the measure Municipal council of Schifflange Lessons, risks, implications... Key lessons The Alzette river restoration project aimed at erasing the effect of the river chanelling, which caused the river uniformisation and an ecological impoverishment. The project consisted in a remeandering, increase of the base level of the river, widening of the riverbed, reconnection of the river to existing ponds and creation of a new pond. The project contributed to restore the flood plain, to prevent flooding and erosion, to restore the natural functionning of the river, to improve the self purification capacity, to improve biodiversity and to intergrate the river in the natural landscape. Success factor(s) Success factor type Success factor role Comments Financing Financing type Comments Barrier Barrier type Barrier role Comments Driver Driver type Driver role Comments Past flooding events main driver A flood event occurred in Schifflange in 1998. Financing share Financing share type Share Comments Policy, general governance and design targets Policy description A flood in Schifflange happened in 1998. A proposition for a project was elaborated afterwards. The main objective was to restore the natural reserve "Am Brill" and to prevent flooding. Policy target Target purpose Peak-flow reduction Improved Biodiversity 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 Policy requirement directive Requirement directive Specification Socio-economic Direct benefits information No information available Ancillary benefits information No information available Costs investment 700000 Costs investment information The investments were essentialy dedicated to filling and clearing works. Costs operation maintenance No information available Costs total 700000 Costs total information The investments were essentialy dedicated to filling and clearing works. Ecosystem improved biodiversity 1 Information on Ecosystem improved biodiversity Biodiversity improvement was expected. Ecosystem impact climate regulation No information available Biophysical impacts Retained water 60000 Retained water unit m3/day Information on retained water The water storage restoration contributed to 15 mintutes delay of the peak flow. The maximal flow duration were reduced frome 42 to 24 minutes. Water quality overall improvements Positive impact-WQ improvement Information on Water quality overall improvements Positive effects on water quality are expected, but no assessment has been realised yet. Soil quality overall soil improvements N/A info Information on Effect delaying peak Significant. The peak flow is delayed by 15 minutes. Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL