Particle kinematics and sediment transport processes in mountain streams: the role of sediment supply and flow regimes

尽管对泥沙输移进行了大量的研究，但对于适用于估计河道中泥沙随时间推移的控制方程还没有达成一致意见。这在一定程度上是由于颗粒床的不规则性，作用于时间和空间上可变的流体力、床面结构和装甲，以及幕式沉积物供应。事实上，河床表面组成(结构和结构)和泥沙供应/储存制度在控制河道稳定性和调节河流泥沙输送方面都发挥着重要作用。山间溪流特别复杂；岩石形成的结构对河床沉积物的流动性和水流的性质都产生了重大影响。此外，这些溪流时不时地从邻近的山坡接收大量泥沙输入，潜在地主导着河道形态和系统动力学。虽然许多研究调查了泥沙和流态变化较少的低地河流的动态，但很少有研究集中在山区溪流上。

Despite a large body of research on sediment transport, no agreement has been established on a governing equation appropriate to the estimation of bulk sediment movement in stream channels over time. In part, this is due to the irregularity of the granular beds acted upon by temporally and spatially variable fluid forces, bedsurface structures and armouring, and episodic sediment supply. Indeed, bed surface composition (texture and structure) and the sediment supply/storage regime both play important roles in controlling channel stability and regulating sediment transport in streams. Mountain streams are especially complex; stones form structures that exert significant influences on both the mobility of the bed sediment and the nature of the flow. In addition, these streams episodically receive large inputs of sediment from adjacent hillslopes, potentially dominating channel morphology and system dynamics. Although many studies have investigated the dynamics of lowland rivers with less variable sediment and flow regimes, little research has focused on mountain streams.