中文摘要：

土壤团聚体作为径流搬运过程中的基本结构单元,其在径流运移中的剥蚀破坏影响着坡面径流入渗状况、泥沙含量及地表侵蚀过程的强度。利用变坡试验水槽,在不同流量（0.4～1.2 L/s）和坡度（8.8%～46.6%）范围内,详细分析了流量、坡度、径流水深和阻力系数对鄂南两种典型母质发育红壤团聚体剥蚀破坏的定量影响。研究结果表明,流量和坡度对两种母质发育红壤团聚体的剥蚀影响都是极显著的,坡度对两种红壤团聚体的剥蚀破坏影响均大于流量;不同流量和坡度组合下的团聚体剥蚀破坏变化规律不同,利用流量和坡度的幂函数可以准确地预测团聚体剥蚀程度;在两种水力学参数之间,团聚体剥蚀程度随着径流水深的增加而降低,随着阻力系数的变大剥蚀程度增加。

英文摘要：

The aggregate is the fundamental structural unit of a soil. The destruction of a soil aggregate that is trans- ported by overland flow may significantly affect the surface runoff and permeability of soils, sediment content and the general erosion intensity. Experiments were performed in a hydraulic flume with varying slope in flow discharge （0.4 - 1.2 L/s） and slope gradient （8.8% - 46.6% ） to investigate the quantitative effects of discharge, slope, flow depth and friction factor on the abrasion extent of red soil aggregates from two parent materials. The results indicated that the effect of discharge and slope on red soil aggregates abrasion extent from two parent materials were both signifi- cant, and the effect of slope were greater than discharge. The change regularities of aggregates abrasion extent were not the same at the different combination of discharge and slope. The results of this study suggested that the power function of the discharge and slope was the best equation for predicting the aggregates abrasion extent. The aggregates abrasion extent was decreasing with increasing flow depth and they were increasing with increasing friction factor.