[Research Objectives]:
The STONE model for national scale N- en P-emission assessments will be kept up-to-date and be made suitable for ex-ante evaluations of the fertilization policy. Primarily N- and P-emissions from agricultural soils to groundwater and surface waters are considered.
Extending the STONE modelling system for assessments of surface water concentrations. Effectiveness of measures taken for the Water Framework Directive need to be evaluated at the national scale and at the catchment scale.
Ongoing validation of the STONE model with respect to nitrate concentrations, phosphate soil saturation and N- en P-emission to surface waters at the national scale and the regional scale Maintenance of STONE model code, data files and documentation
[Results and products]:
Reports on the improvements of the STONE model. Attention will be paid to P-accumulation in soil, link between QUADMOD and ANIMO concerning the estimation of the soil nitrogen supply capacity, the model performance to represent nitrate concentrations in loess areas, the differentiation of fertilization and nutrient uptake by arable crops and the off-line link between the MAMBO fertilization module and STONE
Completely documented version of the STONE model version attuned to ex-ante -evaluation 2007 research questions. |
