screed board

By considering concealing and revealing features of the non-uniform sediments, and using analytical method of theoretical mechanics, vectorial formulae for the competent velocity of sediments at arbitrary plane in both concealing and revealing states are given respectively.

考虑非均匀泥沙的隐暴特性 ,采用矢量力学分析方法 ,本文导出了任意面上处于隐蔽和暴露状态下的泥沙起动流速矢量式。

Based on the reviews of current research, an 2-D horizontal non-uniform sediment numerical model is established according to the character of hydrodynamic and sediment transport in Yangtze estuary.

本文以长江口为例在前人工作的基础上，通过分析长江口水流、泥沙运动特性的基础上，建立平面二维的非均匀泥沙数学模型，并对长江口的泥沙输运过程和输运机理进行了研究。