Code N03 Sector Hydro Morphology The complete description of the NWRM n3_-_floodplain_restoration_and_management.pdf Summary A floodplain is the area bordering a river that naturally provides space for the retention of flood and rainwater. Floodplain soils are generally very fertile and they have often been dried-out to be used as agricultural land. Floodplains in many places have also been separated from the river by dikes, berms or other structures designed to control the flow of the river. They have also been covered by legacy sediments.Major floodplains roles have thus been lost, due to land drainage, intensive urbanization and river channelization. The objective is to restore them, their retention capacity and ecosystem functions, by reconnecting them to the river.Restoring the floodplain roles requires measures such as:- modification of the channel,- removing of the legacy sediment- creation of lakes or ponds in the floodplain- new/modification of agricultural practices,- afforestation, etc.- plantation of native grasses, shrubs and trees- creation of grassy basins and swales- wetland creation- invasive species removal- riparian buffer installation and development Illustration(s) Floodplain before floodingSource: Thomas Borchers’ presentation, NWRM Workshop 1 (from: Christian Damm)Floodplain during floodingSource: Thomas Borchers’ presentation, NWRM Workshop 1 (from: Nora Künkler) Possible benefits with level Benefits Level BP1 - Store runoff High BP2 - Slow runoff High BP3 - Store river water High BP4 - Slow river water High BP5 - Increase evapotranspiration Medium BP6 - Increase infiltration and/or groundwater recharge High BP7 - Increase soil water retention Medium BP8 - Reduce pollutant sources Medium BP9 - Intercept pollution pathways Medium BP10 - Reduce erosion and/or sediment delivery High BP11 - Improve soils High BP12 - Create aquatic habitat Medium BP13 - Create riparian habitat High BP14 - Create terrestrial habitats High BP15 - Enhance precipitation Low BP16 - Reduce peak temperature Medium BP17 - Absorb and/or retain CO2 Medium ES1 - Water storage High ES2 - Fish stocks and recruiting High ES3 - Natural biomass production High ES4 - Biodiversity preservation High ES5 - Climate change adaptation and mitigation Medium ES6 - Groundwater/aquifer recharge High ES7 - Flood risk reduction High ES8 - Erosion/sediment control High ES9 - Filtration of pollutants Medium ES10 - Recreational opportunities High ES11 - Aesthetic/cultural value High PO1 - Improving status of biology quality elements High PO2 - Improving status of physico-chemical quality elements High PO3 - Improving status of hydromorphology quality elements High PO4 - Improving chemical status and priority substances Medium PO5 - Improving quantitative status Medium PO6 - Improving chemical status Medium PO7 - Prevent surface water status deterioration High PO8 - Prevent groundwater status deterioration Medium PO9 - Take adequate and co-ordinated measures to reduce flood risks High PO10 - Protection of important habitats High PO11 - Better protection for ecosystems and more use of Green Infrastructure High PO12 - More sustainable agriculture and forestry High PO13 - Better management of fish stocks High PO14 - Prevention of biodiversity loss High ES5 - Climate change adaptation and mitigation Low Case study(ies) Revitalization of the upper Drau River in Austria River restoration of the lower Aurino in Italy Órbigo River ecological status improvement, Spain Restoration of the Odense river, Denmark Restoring the River Quaggy in London, UK Floodplain reconnection in the Vallei van de Grote Nete, Belgium Wetland restoration in Ciobarciu, Romania Dyke relocation on the river Elbe near Lenzen, Germany Floodplain restoration in the Lonjsko Polje Nature Park in Croatia Flood meadows in the Marais Poitevin, France Floodplain restoration of the river Slampe, Latvia Habitat Reconstruction in the forests of the Körös Valley, Hungary Fluvial and ecosystem restoration of the Arga-Aragon Rivers, Spain Room for the River: Nijmegen dike relocation, Netherlands Multi-purpose water management development along the Körös-ér, Hungary Ecological reconstruction of the Gerai Pond, Romania The Vonarje flood storage reservoir in Croatia Restoration on Comana wetlands, Romania Polder management near Altenheim, Germany Lunéville, Floodplain restoration and reconnection of hydraulic annexes, France Babina Restoration Project, Romania Preservation of floodplain forests, Slovakia Ecological Restoration of Vlascuta Lake, Romania Ecological Restoration of Pochina Lake, Romania Ecological Restoration of Mata Radeanu, Romania Floodplain restoration in the Russenski Lom Nature Park, Bulgaria Wachau and Danube restoration in Austria Baixo Vouga Lagunar (BVL) bocage landscape, Portugal Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL