Estimating subsurface nitrogen accumulation–depletion in catchments by input–output flow analysis
2006 (English)In: Physics and Chemistry of the Earth, ISSN 1474-7065, E-ISSN 1873-5193, Vol. 31, no 17, 1030-1037 p.Article in journal (Refereed) Published
We use input-output analysis of nitrogen flows between various sources-sectors and natural waters in the Swedish Norrstrom drainage basin for investigating and bounding the implication range of some uncertainty sources for results of subsurface nitrogen accumulation-depletion in this basin. We quantify different possible base and extreme assumptions of nitrogen discharges and transport pathways from agriculture to surface and groundwater in the basin. The results are robust in showing considerable nitrogen accumulation-depletion flow interactions taking place between the basin's mobile water and accumulated nitrogen pools in soils, sediments and/or relatively immobile subsurface water zones for all different scenario assumptions. Similar scenario robustness is also found in resulting relative contributions of different active nitrogen source-sectors to nitrogen flows in natural water systems. In the Norrstrom basin, and possibly more generally, nitrogen accumulation-depletion flows to and from accumulated legacies for the future or from the past appear therefore to be more important for water quality than current nitrogen discharges from active source-sectors.
Place, publisher, year, edition, pages
2006. Vol. 31, no 17, 1030-1037 p.
input-output analysis; nitrogen accumulation-depletion; water quality; transport pathways
IdentifiersURN: urn:nbn:se:kth:diva-7187DOI: 10.1016/j.pce.2006.07.007ISI: 000242679100004ScopusID: 2-s2.0-33750629081OAI: oai:DiVA.org:kth-7187DiVA: diva2:12120
QC 201006232007-05-282007-05-282010-12-03Bibliographically approved