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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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。

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This paper introduces an application method and procedure of CAD technology in river cross-section design, with software and hardware platform.

介绍了一种CAD技术在河道断面设计中的应用方法及过程，并给出了所采用的软硬件环境。

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