Modelling tritium and phosphorus transport by preferential flow in structured soil

摘要

Subsurface solute transport through structured soil is studied by model interpretation of experimental breakthrough curves from tritium and phosphorus trace tests in three intact soil monoliths. Similar geochemical conditions, with nearly neutral pH, were maintained in all the experiments. Observed transport differences for the same tracer are thus mainly due to differences in the physical transport process between the different monoliths. The modelling is based on a probabilistic Langrangian approach that decouples physical and chemical mass transfer and transformation processes from pure and stochastic advection.