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Organic matter / nitrogen simulations with SWAP/ANIMO

Organic matter / nitrogen simulations with SWAP/ANIMO. Joop Kroes & Piet Groenendijk. Purpose of modelling efforts. Prediction of environmental impacts of: Fertilization legislation Water management Land use Special combating measures With respect to: Nitrate concentrations in groundwater

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Organic matter / nitrogen simulations with SWAP/ANIMO

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  1. Organic matter / nitrogen simulations with SWAP/ANIMO Joop Kroes & Piet Groenendijk

  2. Purpose of modelling efforts Prediction of environmental impacts of: • Fertilization legislation • Water management • Land use • Special combating measures With respect to: • Nitrate concentrations in groundwater • N & P transport to surface waters • Soil P saturation degree • Trace gas emissions (just started)

  3. Introduction • Key EC Directives • Nitrates 91/676 • Water Framework 2000/60/EC • Marine Conventions (e.g. OSPAR, HELCOM, Barcelona);

  4. Time scales considered • Water Framework Directive / Nitrate Directive related • Duration: 10 – 50 year • Frequency: annual estimates • Generates input to surface quality models: • Duration: 1 – 10 years • Frequency: daily or weekly

  5. Dutch assessment approach for N/P leaching to gw/sw • Characterized by shallow groundwater tables (deltas; wetlands) • Intensive land use (agriculture, urbanisation) • Process oriented modelling approach • National and regional assessments with the same approach • Consensus between research organisations

  6. National assessment STONE model chain

  7. Regional appraoch • Plots: calculation units • soil • hydrology • crops • historical P-accumulation • management • fertilization • relation with deep groundwater

  8. Hydrological pathways precipitation Atmosphere interception transpiration soil-evaporation Plant Surface waters surface runoff snow melt Unsaturated zone drainage/ subsurface infiltration - Transport of soilwater Saturated - Macro pores drainage/ zone subsurface infiltration deep percolation/ seepage Deep Groundwater

  9. Animo model

  10. Parameterizarion of organic matter pool Empirical relation: ANIMO: Animo parameters related to empirical relation:

  11. cattle slurry empirical rel. ANIMO * * * * * * * * * * * *

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