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Particle deposition, resuspension and phosphorus accumulation in small constructed wetlands
Swedish University of Agriculture Science, Sweden.
Swedish National Forens Centre, S-58194 Linkoping, Sweden.
Swedish University of Agriculture Science, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-0722-6083
2018 (English)In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 47, p. 134-145Article in journal (Refereed) Published
Abstract [en]

To improve understanding of phosphorus (P) retention processes in small constructed wetlands (CWs), we analysed variations in sediment deposition and accumulation in four CWs on clay soils in east-central Sweden. Sediment deposition (in traps) generally exceeded the total suspended solids (TSS) load suggesting that resuspension and wetland base erosion were important. This was confirmed by quantification of particle accumulation (on plates) (1-23 kg m(-2) year(-1)), which amounted to only 13-23% of trap deposition. Spatial mean P concentrations in accumulated sediment on plates (0.09-0.15%) were generally similar to temporal mean P concentrations of particles in water (0.11-0.15%). Deposition/accumulation was minor in one wetland with high hydraulic load (400 m year(-1)), suggesting that such small wetlands are not efficient as particle sinks. Economic support for CWs are given, but design and landscape position are here demonstrated to be important for effective P retention.

Place, publisher, year, edition, pages
SPRINGER , 2018. Vol. 47, p. 134-145
Keyword [en]
Constructed wetlands; Resuspension; Sediment accumulation; Sediment deposition
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:liu:diva-143985DOI: 10.1007/s13280-017-0992-9ISI: 000417682400014PubMedID: 29164538OAI: oai:DiVA.org:liu-143985DiVA, id: diva2:1170234
Conference
8th International Phosphorus Workshop (IPW)
Note

Funding Agencies|Swedish farmers foundation; Swedish Agricultural Board; Swedish Environmental Agency; Swedish Agency for Marine and Water Management

Available from: 2018-01-02 Created: 2018-01-02 Last updated: 2018-03-13

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