Influence of internal flow structures in plant community on the whole river flow and applicability of multi-scale analysis

试验研究了高大植物群落与非植被区流量的相互作用。研究发现，在非植被区几乎均匀的流速剖面在群落上游区迅速转变为典型的冠状带慢、干流带快的流速剖面。相反，在群落下游区域，在冠状带后面产生混合运动，影响沿河长时间的水流。在高植物群落位于河流一侧的情况下，观察到与非植被区域相互作用产生的复杂三维电流。

Experimental research was performed on the interaction between the flow in tall plant community and that in non-vegetated area. It was found that velocity profile, which is almost uniform in non-vegetated area, quickly transferred in the upstream zone of the community into the typical profile which is slow in crown zone and fast in trunk zone. On the contrary, in the downstream zone of the community, mixing motion is generated behind the crown zone, which influences long along the river flow. In the case the tall plant community is located along the one side of a river, complicated three dimensional current, which is generated by the interaction with non-vegetated area, was observed.