In the lower reaches, where the current slows, the natural accumulation of sediment in the riverbed has caused the river to change course often in the past.
在河流下游，由于流速变缓，泥沙(等沉淀物)自然而然地堆积在河床中，曾经造成黄河经常改道。
2
Like other rivers that wind across coastal plains, the courseof the lower Indus river shifts frequently.
和其他在沿海平原兜来兜去的河流一样，印度河下游的河道捉摸不定。
3
The suburb of Yeronga (image lower left) also has evident regions of flooding, as does a park and golf course located along a bend in the Brisbane River to the south of St. Lucia (image center).