摘要
对天然河道特别是弯曲河道的纵向离散系数的确定方法进行综述,详细分析了理论公式、示踪试验、经验公式这3种方法的研究现状和发展趋势。讨论了基于断面流速分布的理论公式的适用范围以及国内外学者对该公式使用的拓展;阐述了几种示踪试验中计算纵向离散系数的新方法,并分析了这些方法的特点;列举了一些具有代表性的经验公式,并提出了弯曲河道纵向离散系数研究中一些有待深入研究的问题。
A review was made of the methods for determination of the longitudinal dispersion coefficient in natural rivers, especially in river bends, with emphasis placed on the current situation and development trends, i.e. the theoretical formulas, the tracer experiment and the empirical formulas. The applicability of the theoretical formula based on the velocity profile and its further development by researchers at home and abroad were discussed; some new methods for calculation of the longitudinal dispersion coefficient by means of tracer experiment data, and their features were analyzed; some typical empirical formulas were summarized, and some problems which need further research are proposed.
出处
《中国农村水利水电》
北大核心
2009年第2期5-8,共4页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(50749031)
教育部博士点基金项目(新教师项目)
关键词
纵向离散系数
弯道
示踪实验
longitudinal dispersion coefficient
river bend
tracer experiment
