Metamodels of PEARL and GeoPEARL are used to evaluate Dutch and European policy plans. The following Dutch policy documents are relevant:1991-2000: The Long Term Crop Protection Plan (MJP-G)
PEARL plays an important role in the evaluation of this policy plan, by predicting trends in emissions of pesticides to the groundwater and the atmosphere. A regional-scale version of the model has recently become available. This model can predict the magnitude of the leaching and the area where environmental standards are exceeded.
View the MJP-G report.
A simplified version of PEARL has been used to evaluate, ex ante, parts of this new policy. As a result of measures taken in the last year of the crop protection plan 1991 - 2000 and international registration procedures, the leaching of pesticides will be reduced substantially. Certification of farms contributes to a further emission reduction; this reduction is up to 40% of the total amount leaching calculated for the year 2005 without the new policy. The so-called 'essential uses' (pesticides declared indispensable in the growth of certain crops) were excluded from these calculations.
On behalf of the ministries LNV and VROM, a number of institutes (amongst others Alterra and RIVM) currently develop an environmental indicator and software package, which will be used to follow the progress of the new policy. PEARL or a simplified version (metamodel) will be part of this tool.