The application of a new, spatial nitrogen leaching/retention model NEXRET to the Oulujoki river basin (22800 km2) in Finland is discussed. The model utilizes remote sensing-based land use and forest classification and evaluated export coefficients obtained from detailed small catchment studies. The present and future N depositions were estimated with the regional deposition model DAIQUIRI. Based on source apportionment, N deposition, forestry and agriculture each contribute 16–17% of the total export, with pronounced variation between the different sub-basins. The effect of changing forestry and deposition on N fluxes is assessed by using N deposition scenarios based on recent international emission reduction agreements.
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- Modeling Effects of Changing Deposition and Forestry on Nitrogen Fluxes in a Northern River Basin
- Springer Netherlands