Surface sealing as a modulating mechanism of water content variability: Physically based modeling and field observations at the hillslope scale Academic Article uri icon

abstract

  • Understanding the mechanisms underlying temporal and spatial water content variability at the hillslope and catchment scales remains a current challenge in hydrology. Currently, only few models are validated against flux measurements within the catchment scale, thus offering reliable information regarding internal catchment processes. In arid and semi-arid areas, these include the formation of surface seal that directly affects infiltration and evaporation fluxes but is often disregarded. At the LTER Lehavim site, in the center of Israel (31020'N, 34045'E), a typical hillslope (0.115 Km 2) was chosen offering different aspects and a classic geomorphologic banding. Annual rainfall is 290 mm, the soils are brown lithosols and arid brown loess, prone to soil sealing. The vegetation is characterized by scattered dwarf shrubs (dominant species Sarcopoterium spinosum). An extensive spatial …

publication date

  • December 1, 2011