Andosols are the dominant soils in the Valle de Bravo basin, the origin of a significant amount of Mexico City's drinking water. The main land use is agriculture and most of the existing surface water bodies are eutrophic. Nitrogen fertilizer is used extensively. There have been very few studies...

[fre] L'inflation ne cesse de préoccuper les économistes et les hommes politiques, plus particulièrement ces dernières années. Diverses théories ont tenté de l 'expliquer, elles ont été inspirées par les grands courants de pensée qui traversent la science économique depuis plus d'un...

The paper presents a simplified model called PESTDRAIN. It simulates pesticide transport in a subsurface tile-drained field. It computes surface runoff and tile-drainage flow rates, along with the associated pesticide concentrations, with a variable event-driven time step. PESTDRAIN consists of...