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中文摘要：
目前在黄河口改道、淤积延伸对其上游河道反馈影响问题的认识上，各家研究成果不仅定量相差很大，在定性上也有较大分歧。作者分析认为，黄河下游河道演变与河口演变影响因素繁多，河床（包括河口）冲淤变形十分剧烈，各因素之间的相互作用极为复杂，采用传统的资料分析手段，不能对此复杂情况进行充分和全面的分析，是造成上述研究结论分歧的根源。因此，未来必须借助河工模型试验或数学模型计算等手段开展研究，才可能彻底揭示黄河口演变对河道反馈影响规律。
英文摘要：
At present, many researchers disagree with each other on the problem of feedback influence on the upstream river due to the sedimentation extension and changes of the course in the estuary of Yellow River because their research conclusions differentiate not only quantitatively, but also qualitatively. Through analyzing the existing results, the author thinks that there are many factors that influence the river way and estuary evolution, the erosion and deposition of riverbed in the lower reach of the river including estuary, and their interaction is extremely complicated. Thus, it is difficult to analyze the complex problems fully and roundly with the traditional method of data analysis, which is the main reason of those bifurcations. Therefore, only if the study makes use of the methods of physical model and mathematical model calculation of multiple combination schemes, the law of feedback influence on the lower Yellow River due to the estuary can be discovered drastically.
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