By analysis of the morphological process in longitudinal profile, crosssection 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。
2
Its main work includes the Yellow river sediment cross-section tests, river bed surface quality sampling and particle size distribution analysis and so on.
其主要工作内容包括黄河河道断面淤积测验，河道表层河床质取样及颗粒级配分析等工作。
3
This paper introduces an application method and procedure of CAD technology in rivercross-section design, with software and hardware platform.