Besides the extension length of sedimentation, the factors that effected the river course are channel pattern, process of water and sediment and dredging.
影响河口河道好坏的因素，除淤积延伸长度外，还应包括河槽形态、水沙过程、河口疏浚等。
Tarim river lies in Takilamakan desert, so studies on riverbed evolvement process and channel regulation have significance for the river protection.
塔里木河位于塔克拉玛干沙漠，其河床演变和河道整治对保护塔里木河具有重要的意义。
Taking the changing tendency forecast of the channel patterns as an example, we have further discussed the application of geomorphic thresholds to the channel process in the Lower Yellow River.
并且以河型转化趋势预测为例，对地貌临界在河床演变中的应用作了进一步的探讨。
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