hh.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Analysis of phosphorus retention variations in constructed wetlands receiving variable loads from arable land
Linköping University, Linköping, Sweden.
2011 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
Linköping: Department of Physics, Chemistry and Biology, Linköping University , 2011. , s. 28
Serie
Linköping Studies in Science and Technology, ISSN 0280-7971 ; 1482
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:hh:diva-20140ISBN: 978-91-7393-168-7 OAI: oai:DiVA.org:hh-20140DiVA, id: diva2:577085
Handledare
Tillgänglig från: 2013-01-04 Skapad: 2012-12-14 Senast uppdaterad: 2018-03-22Bibliografiskt granskad
Delarbeten
1. Phosphorus load variations and retention in non-point source wetlands in southern Sweden
Öppna denna publikation i ny flik eller fönster >>Phosphorus load variations and retention in non-point source wetlands in southern Sweden
Visa övriga...
2011 (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Abstract [en]

Data from seven constructed wetlands receiving runoff from agricultural catchments in the south of Sweden were investigated with respect to phosphorus (P) retention. The seven wetlands differed in size (0.22-2 ha), design, land use and catchment characteristics. The hydraulic load varied between 7 and 725 m yr-1, which reflect the different geographical and hydrological conditions. The overall aim of this study was to increase the understanding of how water flow and inflow P concentration varations affect the P retention in constructed wetlands receiving runoff from arable land. Water flow was measured continuously, and time or flow proportional water samples were taken. Grab samples were taken during high flow periods and also to supplement the automatic water sampling. P retention varied between wetlands, from 1 to 58 kg ha-1 yr-1, and was correlated to the P load (R2=0.9, p<0.05). P retention in the wetlands varied strongly between years, and negative retention was recorded for some years and wetlands. When investigating monthly retention for each wetland, release of P corresponded to either high flow or possible anoxic conditions during low-flow periods in summer or during winter when ice covered the wetlands. Analyses of grab samples revealed a relationship between TP concentration and water flow for most wetlands. In some wetlands, P was transported mainly as particulate P (PP), but in other wetlands, soluble P was the dominating form in both inflow and outflow. Incoming concentrations varied greatly between wetlands (1-2000 μg l-1) which reflected the different catchment characteristics, e.g. land use, soil type and topography.

Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:hh:diva-20141 (URN)978-91-7393-168-7 (ISBN)
Tillgänglig från: 2012-12-14 Skapad: 2012-12-14 Senast uppdaterad: 2018-03-22Bibliografiskt granskad
2. Efficiency of a constructed wetland for retention of sediment-associated phosphorus
Öppna denna publikation i ny flik eller fönster >>Efficiency of a constructed wetland for retention of sediment-associated phosphorus
2011 (Engelska)Ingår i: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 674, nr 1, s. 179-190Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A constructed wetland (2.1 ha; 2% of catchment area) in southeast Sweden, in a catchment with 35% arable land on clay soils, was investigated with respect to phosphorus (P) retention, focusing on particulate P (PP) and sediment accretion. The aims were to (i) estimate P retention and identify the dominating retention processes; (ii) investigate how well estimates of P retention based on inflow-outflow measurements compared with the amount of P accumulated in the sediment. In- and outflow of P was measured during 4 years with continuous flow measurements and flow-proportional weekly composite samples. P in the accumulated sediment was estimated based on core samples and analyzed using sequential fractionation. Total P load during 4 years was 65 kg ha-1 and intensive sampling events detected 69% as PP. Based on inflow-outflow estimates the mean P retention was 2.8 kg ha-1 year-1, or 17%, but the amount of P accumulated in the inlet zone equated 78% of the TP load. This discrepancy showed the need to add studies of sediment accumulation to inflow-outflow estimates for an improved understanding of the P retention. The dominating P forms in the sediment were organic P (38%) and P associated with iron or aluminum (39%), i.e., potentially mobile forms. In areas colonized by Typha latifolia, the amount of P in the upper sediment layer (390 kg) was more than double the total P load of 136 kg. Cycling and release in those areas is a potential source of P that deserves further attention. © 2011 Springer Science+Business Media B.V.

Ort, förlag, år, upplaga, sidor
Dordrecht: Springer Netherlands, 2011
Nyckelord
Constructed wetland, Diffuse pollution, Long-term retention, Particulate phosphorus, Sediment accretion, Sediment phosphorus fractions
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:hh:diva-20295 (URN)10.1007/s10750-011-0728-y (DOI)000293163900013 ()2-s2.0-79960739072 (Scopus ID)
Anmärkning

Ingår i avhandling: Analysis of phosphorus retention variations in constructed wetlands receiving variable loads from arable land

Tillgänglig från: 2013-01-04 Skapad: 2013-01-04 Senast uppdaterad: 2018-03-22Bibliografiskt granskad

Open Access i DiVA

fulltext(1568 kB)646 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 1568 kBChecksumma SHA-512
dd65b28482b85c1e1605c06b96d8039fd139184f649597dfdad873adfaa783ff645734dfc030ccda6c976d3994129a470cad7664ef3585c0ddc677f22c960f1f
Typ fulltextMimetyp application/pdf

Personposter BETA

Johannesson, Karin

Sök vidare i DiVA

Av författaren/redaktören
Johannesson, Karin
Naturvetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 646 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

isbn
urn-nbn

Altmetricpoäng

isbn
urn-nbn
Totalt: 115 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf