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
This paper introduces an application method and procedure of CAD technology in rivercross-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。
3
In calculation models of cutting volume for dredging project, the crosssection is usually a special one through survey points, and the curve of the river bed is assumed to be a line or a polyline.