River section analysis is the foundation of riverbed evolution analysis.
河道断面分析是河床演变分析的基础。
By analysis of the morphological process in longitudinal profile, cross section and river pattern, the law of river course evolution at Yellow river estuary was summarized.
通过分析黄河口河道在纵剖面、横断面、河型等方面的演变过程，总结归纳出黄河口河道的演变规律。
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