Sediment load change with erosion processes under simulated rainfall events

摘要: It is of great significance to quantify sediment load changing with erosion processes for improving the precision soil loss prediction. Indoor rainfall experiments were conducted in 2 intensities (90 mm·h−1 and 120 mm·h−1), four slope gradients (17.60%, 26.80%, 36.40%, 46.60%) lengths (5 m, 10 m). Erosion are divided into five stages. Results show that yield mainly sourced from rill erosion, contributing 54.60% 95.70% duration which extended by gradients. Sediment concentration significantly different along stages, highest values development stage (SIV). Surface flow velocities (interrill rill) demonstrate less significant differences Rainfall intensity increases all up 12.0 times higher when 90 mm·h−1. There an increasing trend rising gradient, however, fluctuations existed lowest on 26.80% respectively, among treatments. The gradient effects enhanced length. this study important validating hillslope modelling at each stage.