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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。
Soil aggregates, as the basic structural units in runoff transport process, denudation and destructive effect on runoff infiltration, sediment content and intensity of surface erosion process. In the range of 0.4 ~ 1.2 L / s and the gradient (8.8% ~ 46.6%), the effects of flow rate, slope, runoff depth and resistance coefficient on the growth of two typical red soils Aggregate denudation damage quantitatively. The results show that the effect of flow rate and slope on the denudation of two parental red soil aggregates is significant. The effect of slope on the denudation and destructiveness of both red soil aggregates is greater than that of the flow rate. The denudation and degradation of aggregates under different flow rates and slope combinations The variation law is different. The denudation degree of agglomerate can be accurately predicted by the power function of flow rate and slope. Between the two hydraulic parameters, the denudation degree of agglomerate decreases with the increase of runoff water depth. With the increase of drag coefficient, Increase in degree.