Scaling effect of hydrological responses in vegetated semi-arid areas with surface sealing Academic Article uri icon


  • Soil surface sealing and vegetation patches are common features in semi-arid areas that can affect hydrologic responses of these lands. A previous study in such environments showed quantitatively that surface sealing and vegetation patches are the major factors controlling rainfall-runoff processes at the plot scale. There, however, still exist some open questions regarding the effect of varying spatial scales on the hydrologic response. This study aims to examine the scale effect on the rainfall-runoff relationship of a semi-arid hillslope. A modeling approach coupling a two-dimensional surface runoff model with a two- layer infiltration model is applied to multiple scales for the rainfall-runoff analysis. To facilitate this study, upscaling approaches are adopted to reduce the model spatial resolution hence the overall computation burden while preserving model accuracy …

publication date

  • December 1, 2013