Coupling 1D Monte-Carlo simulations and geostatistics to assess groundwater vulnerability to pesticide contamination on a regional scale

摘要

A method to predict groundwater vulnerability to pesticide contamination on a regional scale has been developed and applied to a part of the upper Rhone river valley in Western Switzerland. Stochastic application of deterministic pesticide leaching models(Monte-Carlo), along with Geostatistical interpolation techniques, were used to map both vulnerability levels and uncertain- Ties. The various tested leaching models(numerical and analytical solutions of the convection-dis- Persion equation, capacitive model)lead to similar outcomes. The results maps show very high Vulnerabilities.