强风作用下珠江伶仃洋河口湾能量耗散分析  

Effects of strong wind on tidal energy flux and dissipation in Lingdingyang Bay of Pearl River

作　　者：倪培桐[1] 韦惺[2] 

机构地区：[1]广东省水利水电科学研究院,广东广州510630 [2]中国科学院南海海洋研究所,广东广州510301

出　　处：《水利水电科技进展》2017年第3期35-41,共7页Advances in Science and Technology of Water Resources

基　　金：广东水利科技创新项目(2016-12);广东省科技计划(2010B03080004)

摘　　要：基于珠江河网-河口湾的三维数值模型,通过区域能量耗散项积分方法分析了风作用下的伶仃洋河口湾能量耗散。结果表明,潮能沿深槽向河口与三角洲传播,风的作用改变了伶仃洋河口湾能量通量的振幅和相位,但对各断面多潮平均能量通量影响不大;强风的作用使伶仃洋河口湾区域的单位面积能耗增加,垂向涡动能耗增强1~2倍,摩擦能耗变幅不大,且不会改变地貌形态阻力作用下的能耗空间分布性质。Based on the three-dimensional numerical model for Lingdingyang Bay of the Pearl River network,the tidal energy flux and dissipation in Lingdingyang Bay under effects of strong wind were analyzed with the method of integration of regional energy dissipation. Results show that the tidal energy transfers into Lingdingyang Bay and the Pearl River Delta through the deep channel. The effects of wind lead to the changes in the amplitude and phase of the tidal energy flux in Lingdingyang Bay,while have insignificant influence on the average energy flux of multiple tides through each crosssection. Strong wind increases the tidal energy dissipation per unit area in Lingdingyang Bay,and the vertical eddy turbulence energy dissipation increases by 1 - 2 times; however,it does not produce a great change in friction-induced energy dissipation and does not change the spatial distribution of energy dissipation under the effects of landform ＇s resistances.

关 键 词：珠江河口 能量通量 能量耗散 风 小尺度 动力结构 高能耗区 

分 类 号：TV148[水利工程—水力学及河流动力学]