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
2002 (English)In: Water Science and Technology, ISSN 0273-1223, Vol. 45, no 9, 285-292 p.Article in journal (Refereed) Published
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.
denitrification in groundwater, diffuse nitrogen leaching, GIS - modeling, groundwater residence times
IdentifiersURN: urn:nbn:se:liu:diva-48887OAI: oai:DiVA.org:liu-48887DiVA: diva2:269783