The consequences of interpolating or calculating first on the simulation of pesticide leaching at the regional scale
Models for calculating pesticide leaching require soil data, which is collected at drilling points. This article describes how this information can be interpolated to maps on the national scale and what the consequences are for the leaching calculated for pesticides.
The consequences of management of soil data on leaching calculated for pesticides
The Netherlands Environmental Assessment Agency uses the GeoPEARL model to calculate the leaching of pesticides to groundwater and surface water. One example of this use is seen in the Interim Evaluation of the Policy Document On Sustainable Crop Protection. Use of the model requires such input data as soil data, which is not readily available, but has to be collected at drilling points. This information then has to be interpolated for use on nationwide maps. The various methods available for collecting this point data are described here. In one of the methods the model is directly applied to boreholes that are taken to be representative for one soil map unit. This approach has been proven in practice as the most adequate and for this reason is used in the GeoPEARL model.
This article is also incorporated into Bertrand Leterme’s PhD thesis. MNP was involved in the preparatory work for this thesis.
- To the thesis: "Assessing pesticide leaching at the regional scale: A case study for atrazine in the Dyle catchment"
|Author(s)||Leterme B ; Vanclooster M ; Linden AMA van der ; Tiktak A ; Rounsevell MDA|
|Publication||Geoderma 2007; 137(3-4):414-25|