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Nitrogen source apportionment modeling and the effect of land-use class related runoff contributions
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2007 (English)In: Nordic Hydrology, Vol. 38, no 4-5, 317–331- p.Article in journal (Refereed) Published
Abstract [en]

Models simulating nutrient transport at the catchment scale are frequently used for source

apportionment and thereby for finding cost-efficient management strategies for water quality improvements. One

typical modelling approach at the catchment scale is the use of leaching coefficients (mass per unit flow of

water) to compute the nutrient input based on land-use information. In this study two different such model

approaches, the lumped Fyrismodel and the distributed HBV-N-D model, were compared based on simulations

for the River Fyris catchment in central Sweden. A major difference between the models were different

assumptions of specific runoff variations between different land-use classes. These differences had a

considerable effect on the computed source apportionment. The higher specific runoff from agricultural areas in

the HBV-N-D model compared to the Fyrismodel resulted in a larger contribution of agricultural areas to the total

nitrogen export. These results demonstrate the importance of the assumptions of the spatial variation of specific

runoff on source apportionment HBV-N-D model estimations.

Place, publisher, year, edition, pages
2007. Vol. 38, no 4-5, 317–331- p.
Keyword [en]
Fyrismodel; HBV-N-D model; leaching coefficients; model comparison; River Fyris catchment; source apportionment
Identifiers
URN: urn:nbn:se:su:diva-20547DOI: doi:10.2166/nh.2007.015ISI: 000251515500002OAI: oai:DiVA.org:su-20547DiVA: diva2:187073
Available from: 2007-11-27 Created: 2007-11-27 Last updated: 2011-01-11Bibliographically approved

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