The objective of this research was to assess the effect of gullying on the erosive response at the basin scale by modeling. For this purpose, a distributed hydrological model, which includes erosion by raindrop, rilling and gullying, was configured and applied in a Mediterranean basin in southern Spain. The results show a range of parameters close to those provided by the literature and good agreement with field measurements. However, the simulations indicate that the rill erodibility parameter at the surface is overestimated by as much as 70% to compensate for gullying processes. Other parameters, such as the subsoil erodibility of the soil profile, play an important role in the erosive response of the basin. A geomorphological threshold for sediment yield that relates density of gullies and erodibility parameters was found. These responses are especially relevant in semiarid environments where the intense pulses of precipitation have important effects on landscape evolution.

这项研究的目的是通过建模来评估流沙对流域尺度侵蚀反应的影响。为此，在西班牙南部的地中海盆地配置并应用了分布式水文模型，其中包括雨滴，钻探和沟壑的侵蚀。结果显示一系列参数接近文献提供的参数，并且与现场测量结果吻合良好。但是，仿真表明，表面的钻蚀性参数被高估了多达70％，以补偿流沙过程。其他参数，例如土壤剖面的地下土壤易蚀性，在盆地的侵蚀反应中起着重要作用。发现了沉积物产量的地貌阈值，该阈值与沟壑的密度和可蚀性参数有关。