The effect of soil type, meteorological forcing and slope gradient on the simulation of internal erosion processes at the local scale.

摘要: Numerical simulation experiments of water erosion at the local scale (20 × 5 m) using a process-based model [Plot Soil Erosion Model_2D (PSEM_2D)] were carried out to test effects various environmental factors (soil type, meteorological forcing and slope gradient) on runoff response determine dominant processes that control sediment yield lengths. The selected corresponded conditions for which had been fully tested beforehand. use Green Ampt infiltration explained role played by rainfall intensity in response. Sediment outlet simulated area was correlated positively with gradient, but less sensitive soil type. relationship between loss per unit area) length greatly influenced all factors, there general tendency towards higher when longer. Contribution gross surfaces lengths ranging from 4 20 m. highest yields cases where flow activated. An increase gradient resulted detachment starting upstream. exported came predominantly zone located near outlet. microrelief helped development rill network controlled both ratio length. Copyright © 2010 John Wiley & Sons, Ltd.