Phosphorus and particle retention in constructed wetlands—A catchment comparison

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Johannesson, Karin M.,1982-Linköpings universitet,Teoretisk Biologi,Tekniska högskolan,Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden (författare)

Phosphorus and particle retention in constructed wetlands—A catchment comparison

Artikel/kapitelEngelska2015

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Amsterdam :Elsevier,2015
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:hh-26458
https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-26458URI
https://doi.org/10.1016/j.ecoleng.2014.08.014DOI
https://res.slu.se/id/publ/75595URI
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110405URI

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Språk:engelska
Sammanfattning på:engelska

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This project was financed by the Swedish Research Council Formas, the Swedish Board of Agriculture, the Swedish Farmers’ Foundation for Agricultural Research and the Danish Strategic Research Council through the project SupremeTech.
Abstract Seven constructed wetlands (0.05–0.69 ha), situated in agricultural catchments (22–267 ha) in the south of Sweden, were studied for two years with two aims: to (i) quantify their function as sinks for particles and phosphorus (P) lost from the catchments, and (ii) investigate to what degree catchment and wetland characteristics and modeled loads (using hydrochemical catchment models) could be used to explain differences in retention between the wetlands. The wetland areas ranged from 0.04 to 0.8% of the respective catchment area, and they were situated in areas dominated by fine-textured soils with relatively high P losses and the main proportion of P transported in particulate form. Net P and particle retention were estimated during two years from annual accumulation of particles on sedimentation plates (40 × 40 cm) on the bottom of the wetlands.There was an annual net retention of particles and P, but with a large variation (for particles 13–108 t ha−1 yr−1 and for P 11–175 kg ha−1 yr−1), both between wetlands and between years. The difference between the two years was larger than the difference in mean P retention between the seven wetlands. There was a positive relationship between P and particle retention and three catchment factors, i.e. P status (P-AL) of agricultural soils, average slope in the catchments and the livestock density, and a negative relationship with the agricultural soil clay content. In addition, there was a positive relationship with the wetland length:width ratio. Contrary to expectations, neither the modeled hydraulic load nor P load was significantly correlated with the measured particle and P retention. There was also a positive relationship between P concentration in the sediment and soil P status in the catchment. The results imply that considerable errors are introduced when down-scaling modeled regional nutrient losses to estimate the P loads to small wetlands in agriculturally dominated catchments. A more qualitative approach, using catchment characteristics for identification of hot-spot fields, may be equally good to identify suitable locations for constructed wetlands to reduce diffuse P loads. © 2014 Elsevier B.V.

Ämnesord och genrebeteckningar

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Nanoteknik hsv//swe
ENGINEERING AND TECHNOLOGY Nano-technology hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Multidisciplinär geovetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geosciences, Multidisciplinary hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
NATURVETENSKAP Biologi hsv//swe
NATURAL SCIENCES Biological Sciences hsv//eng
Agricultural soils
Catchment characteristics
Constructed wetlands
Phosphorus retention
Sediment plates

Biuppslag (personer, institutioner, konferenser, titlar ...)

Kynkäänniemi, Pia,1980-Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden (författare)
Ulen, BarbroSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment,Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden(Swepub:slu)50662 (författare)
Weisner, Stefan,1954-Högskolan i Halmstad,Våtmarkscentrum,Wetland Research Centre, Halmstad University, Sweden(Swepub:hh)stewe (författare)
Tonderski, KarinLinköpings universitet,Biologi,Tekniska högskolan,Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden(Swepub:liu)karsu52 (författare)
Geranmayeh, PiaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)48038 (författare)
Linköpings universitetTeoretisk Biologi (creator_code:org_t)
Sveriges lantbruksuniversitet

Sammanhörande titlar

Ingår i:Ecological EngineeringAmsterdam : Elsevier80, s. 20-310925-85741872-6992

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