Spatiotemporal evolution of water content at the rainfall-event scale under soil surface sealing conditions Conference Paper uri icon

abstract

  • Surface water content dynamics rules the partitioning between infiltration, runoff, and evaporation fluxes. Extending the knowledge on factors controlling top-soil water content temporal stability (TS) is needed to calibrate and validate various remote sensing technologies. Spatiotemporal evolution of water content is highly non-linear, being affected by various factors at different spatial and temporal scales. In semi-arid climates, this evolution is significantly affected by the formation of surface seals, shown in previous studies to significantly reduce both infiltration and evaporation fluxes from the soil. The drying regime in a natural sealed soil system exerts a sharp contrast in the soil profile-a very dry seal is superimposed on top of a wetter soil layer. One question is thus, whether seal layers contribute to or destroy temporal stability of top soil water content at the hillslope scale. To …

publication date

  • April 1, 2012