Ta?by kommun har sommaren 2013 info?rt en fo?r Sverige ny dagvattenreningsteknik i form av en flytande va?tmark, som har anlagts i Ro?nningesjo?n. Tekniken kan fo?rklaras som en hybrid, da?r de biologiska reningsprocesserna liknar en naturlig va?tmark, medan anla?ggningen hydrologiskt fungerar mer som en sedimentationsdamm.Att va?tmarken a?r den fo?rsta i Sverige go?r det extra intressant att utva?rdera. I och med denna rapport har dels en specifik underso?kning av anla?ggningen gjorts, med sa?rskild vikt vid det begra?nsande na?ringsa?mnet fosfor.

Due to global climate change and the rising levels of greenhouse gases (GHG) in the atmosphere, the interest for seeking solutions for mitigation has increased. While much attention has been directed towards technical solutions such as carbon capture and storage (CCS), biogenic carbon sinks has also garnered significant attention. Previous studies have shown that coastal ecosystems such as seagrass meadows and mangroves have a much greater capacity for storing carbon (C) compared to terrestrial ecosystems. That raises the question if other coastal ecosystems, such as coastal wetland forests, that previously haven?t been considered as blue carbon habitats also contribute to coastal carbon sink capacity.