A process-based preferential flow transport model was implemented in a geographic information system to locate areas in the landscape with high risk of contamination by agrochemicals, especially pesticides. Protecting ground water resources necessitates a ...

In this paper a model is presented which interprets virus removal as a function of collision efficiencies αβ and αλ, inactivation rate coefficient μl and rate parameter γ. Initial high removal is determined by ab, which decreases exponentially at a rate g ...