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Modelling nitrogen transport and retention in the catchments of southern Sweden
SMHI, Research Department, Hydrology.ORCID iD: 0000-0001-8314-0735
SMHI, Research Department, Hydrology.
1998 (English)In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 27, no 6, 471-480 p.Article in journal (Refereed) Published
Abstract [en]

The Baltic Sea is suffering from eutrophication and attempts are being made to reduce nutrient loads. This article focuses on nitrogen transport from southern Sweden (145 000 km(2)), and presents a model approach (HBV-N) that has been used in the national decision-making process for best management practices. Calculations of nitrogen leaching, retention in the freshwater system, net transport to the sea, and source apportionment are presented for the period 1985-1994. Input data were handled in GIS, including results from SOIL-N and MATCH. Daily simulations were made in 3725 subbasins with calibration against measured time series at 722 sites. Diffuse source pollution was normally retained by 10-25% before entering the river network. Lakes normally reduced nitrogen transport by 30-40 kg ha(-1) yr(-1) of lake area. On average, 45% of the annual gross load was reduced during transport, but temporal and spatial variations were great. 75 000 tonnes N yr(-1) reached the sea.

Place, publisher, year, edition, pages
1998. Vol. 27, no 6, 471-480 p.
National Category
Oceanography, Hydrology, Water Resources
Research subject
Hydrology
Identifiers
URN: urn:nbn:se:smhi:diva-1553ISI: 000077140400010OAI: oai:DiVA.org:smhi-1553DiVA: diva2:850960
Available from: 2015-09-03 Created: 2015-08-31 Last updated: 2017-12-04Bibliographically approved

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Arheimer, Berit

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