Nitraat in het bovenste grondwater in de zandgebieden van Nederland; een geografisch beeld op basis van monitoringgegevens en een vergelijking met de resultaten van procesmodellen

Models relating nitrogen supply and nitrate leaching are based upon scientific knowledge and experiments. These deterministic models are used for scenario analysis to reduce nitrate leaching. The models also give a geographical view of nitrate in the uppermost groundwater. Because of the difference in scale between experimental fields and a geographical view, systematic differences between reality (measurements) and model calculations can occur. Our goal is to make a geographical view of the Netherlands for the occurence of nitrate in the uppermost groundwater of agricultural land and of forests, by statistical interpolation of measurements. Indications will be given of magnitude and origin of the differences between deterministic and statistical models