摘要
在太湖实际波浪观测的基础上,采用率定验证后的第三代动谱平衡方程,考虑实际水底地形、波浪折射、浅化、反射、破碎、湖流等条件下,对太湖波浪进行数值模拟,研究太湖波浪的主要影响因素.结果表明:SWAN模型可以较好地模拟风作用下太湖风浪的生成和传播过程,模型在太湖应用是合适的;波高、波长、波周期等波浪参数在太湖的分布与风速、风向、水深等因素密切相关;在相同风向、不同风速情况下,太湖波浪发展至稳定状态的时间不一样;在不同风向,相同风速持续作用下,有效波高达到稳定的时间差不多,变化趋势也比较相同.说明波浪的发展不光取决于风速的大小,还同风的持续吹的时间和风区长度有关.
On the basis of measured data about wave in Lake Taihu, the calibrated wave model which was described by the third-generation spectral action balance equation was obtained, The several key waves＇ factors were considered in SWAN model such as bottom topography, wave refraction, depth-induced dissipation, wave break, lake current, etc. The wave in Lake Taihu was simulated and the main influence factors of wave were analyzed by this model, The results showed that the SWAN model can well describe the process of wave＇s growth and propagation in Lake Taihu. The distribution of wave heights, wave lengths, wave periods, etc, were closely related to wind speed, wind direction, water depth, etc. On the condition of the same direction and different wind speed, the required time from wave growth to wave stabilization was different; However, On the condition of the different direction and same wind speed, the required time was nearly the same. Therefore wave＇s growth were not only depended on wind speed, but also depended on the wind＇s sustained action and fetch.
出处
《湖泊科学》
CAS
CSCD
北大核心
2008年第1期117-122,共6页
Journal of Lake Sciences
基金
教育部博士点基金项目(20070294019)
国家自然科学基金项目(50579015)
河海大学自然科学基金项目(2007416611)联合资助．
关键词
太湖
波浪
SWAN模型
动谱方程
Lake Taihu
wave
SWAN
numerical model
spectral action balance equation
