中文摘要：

由于生成网格质量的优劣直接影响流场计算的精度和效率，在对目前常用的几种网格生成方法进行比较的基础上，提出了代数法和偏微分方程相结合的一类新的混合方法。该方法能有效地控制所生成网格的疏密，且在边界处有良好的正交性。通过具体算例，说明该生成方法具有良好的可靠性和较强的适应性等特点，可以用于解决天然河道、水库等不规则边界网格生成问题。

英文摘要：

The quality of the grids influences the precision and efficiency of the simulation directly. In this paper, some grid generation methods are compared, and a new hybrid method by combing algebraic and differential methods is constructed. The new method can control the grid effectively and preserve good orthogonality at boundaries. Some numerical tests are reported. The tests results show that the new hybrid method is reliable and reasonable. It can be used in the practical simulation for natural rivers.