摘要
鉴于长江口水流流速垂向分布偏离对数分布的情况很多,采用分形理论研究J型、C型和S型流速剖面,发现J型流速分布呈直线型,而C型和S型流速并非常维形分维,呈1阶累计和变维分形垂线分布,进而通过对比不同拟合函数式的拟合效果,验证了三次函数式为C型和S型流速拟合的最佳公式。
In Yangtze River estuary, there are many situations that vertical flow velocity distribution deviates from logarithmic distribution. Fractal theory is used to investigate J-type, C-type and S-type flow velocity distribution profile. It finds out that J-type distribution profile appears linear relationship while C-type and S-type distribution profiles appear first-order accumulated variable-dimensional fraetal phenomenon instead of constant-dimensional fractal phenomenon. And then through comparison of fitting effects of different fitting functions, it verifies that cubic function is the best fit formula of C-type and S-type flow velocity distribution.
出处
《水电能源科学》
北大核心
2015年第12期37-39,31,共4页
Water Resources and Power
关键词
长江口
流速垂向分布
分形理论
潮流
Yangtze River estuary
vertical flow velocity distribution
fractal theory
tide
