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The SOIL-N/WEKU model system - a GIS-supported tool for the assessment and management of diffuse nitrogen leaching at the scale of river basins
Res Ctr Julich, Programme Grp Syst Anal & Technol Evaluat, D-52425 Julich, Germany Linkoping Univ, Dept Math, Div Stat, SE-58183 Linkoping, Sweden NERI, DK-8600 Silkeborg, Denmark.
Res Ctr Julich, Programme Grp Syst Anal & Technol Evaluat, D-52425 Julich, Germany Linkoping Univ, Dept Math, Div Stat, SE-58183 Linkoping, Sweden NERI, DK-8600 Silkeborg, Denmark.
Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Mathematics, Statistics .
Res Ctr Julich, Programme Grp Syst Anal & Technol Evaluat, D-52425 Julich, Germany Linkoping Univ, Dept Math, Div Stat, SE-58183 Linkoping, Sweden NERI, DK-8600 Silkeborg, Denmark.
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2002 (English)In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 45, no 9, 285-292 p.Article in journal (Refereed) Published
Abstract [en]

The SOIL-N/WEKU model system was developed to estimate groundwater-borne nitrogen inputs into river systems. The core of this model system is composed of a soil nitrogen leaching model (SOIL-N) and a groundwater residence time/denitrification model (WEKU). The application of the model system was carried out in the framework of the EU-project RANR (Regional analysis of subsurface nitrogen retention and its impact on the nitrogen export from land to sea) for a macroscale study river basin in Germany (the Uecker basin, ca. 2,400 km(2)) and a mesoscale study catchment area in Denmark (the Gjern basin, ca. 200 km2). For both catchment areas, the,modelled average nitrogen loads leached into the groundwater were about 40 kg N/ha a, while the remaining groundwater-borne nitrogen intake to rivers was quantified to an average of about 2 kg/ha a. The comparison with observed groundwater-borne riverine nitrogen loads showed a very good agreement, proving the key role nitrogen retention in groundwater plays in the two catchment areas.

Place, publisher, year, edition, pages
2002. Vol. 45, no 9, 285-292 p.
Keyword [en]
denitrification in groundwater, diffuse nitrogen leaching, GIS - modeling, groundwater residence times
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:liu:diva-48887OAI: oai:DiVA.org:liu-48887DiVA: diva2:269783
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Grimvall, Anders

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