What is GeoPEARL? GeoPEARL is a spatially-distributed model of pesticide leaching to the groundwater and surface waters in the Netherlands. Calculations.

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Presentation transcript:

What is GeoPEARL? GeoPEARL is a spatially-distributed model of pesticide leaching to the groundwater and surface waters in the Netherlands. Calculations are performed for 1D-columns During the parameterisation of the model, information from a regional groundwater flow model was used so that it is possible to distinguish between fluxes into the groundwater and fluxes into surface waters (next slide).

Position of PEARL column in landscape field- ditches water courses < 3m water courses > 3 m PEARL 1D column Leaching into the regional groundwater Groundwater table Drainage into local surface waters

The plot approach PEARL is run in a GIS context for a large number of unique combinations (plots) of soil, climate, land-use and hydrogeological units.

Derivation of the unique combinations: GeoPEARL is a spatially-distributed model of pesticide leaching to the groundwater and surface waters in the Netherlands The core of the model consists of a 1D-model, i.e. FOCUS PEARL 2.2.2. PEARL is run in a GIS context for a large number of unique combinations (plots) of soil, climate, land-use and hydrogeological units. A Graphical User Interface facilitates model use.

Plots are represented by a single vertical column: A plot

Basic soil properties in GeoPEARL Clay soils with near neutral pH-values (‘lower part’) Acidic peat soils Slightly acidic sandy soils (‘higher part’)

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