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Abstract

The MASONW (MACRO + SOILN + Watershed) model describing nitrogen leaching in watersheds was developed and tested. The model is based on the MACRO and SOILN models. The dual-porosity model MACRO simulates water flow on the field scale. The SOILN model describes turnover and leaching of nitrogen. Two main features of a watershed have been added into these two models: (a) the existence of a river system, and (b) variable thickness of the aeration zone within a watershed. Good agreement between the output of the MASONW model and observed data for water discharge and nitrate concentrations were achieved in the Odense watershed (496 km(2)) in Denmark.

Keywords

modelling; nitrogen leaching; river system; watershed; MACRO model; SOILN model

Published in

Hydrological Sciences Journal
2004, volume: 49, number: 2, pages: 313-322
Publisher: IAHS PRESS, INST HYDROLOGY

SLU Authors

  • Larsson, Martin

    • Department of Soil Sciences, Swedish University of Agricultural Sciences

UKÄ Subject classification

Agricultural Science

Publication identifier

  • DOI: https://doi.org/10.1623/hysj.49.2.313.34836

Permanent link to this page (URI)

https://res.slu.se/id/publ/3205