Modeling preferential transport of stable isotopes and heat in a shallow hillslope soil

Tomas Vogel1
1 Faculty of Civil Engineering, CTU Prague

P 13.3 in Czech-German exchange on environmental-, soil- and hydro(geo)logical issues

The research is focused on improved quantitative understanding of processes controlling the movement of water and heat below the soil surface under natural vegetation. Special attention was paid to the preferential transport of oxygen-18 during rainfall-runoff events and to the impact of preferential flow on heat transport. Transient flow of water and transport of heat were simulated using a dual-continuum model with two semi-separate flow domains representing the soil matrix and the network of preferential pathways. The soil water status, subsurface fluxes, temperatures, and isotope contents were monitored at an experimental hillslope site. The model was able to reproduce quite well the measured natural variations of oxygen-18, and, at least in principle, also the measured temperatures of effluent subsurface water.

Letzte Änderung 01.11.2013