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| 珠江口磨刀门河口动力平衡特点及人类活动对其影响 | |
| 引用本文： | 贾良文,吴超羽,任杰. 珠江口磨刀门河口动力平衡特点及人类活动对其影响[J]. 海洋工程, 2006, 24(2): 53-60 |
| 作者姓名： | 贾良文 吴超羽 任杰 |
| 作者单位： | 广东省航道局,广东,广州,510115;中山大学,近岸海洋研究中心,广东,广州,510275 |
| 基金项目： | 973项目“长时间尺度河口近岸环境演变及其对河口过程的响应”资助课题(2002CB412407) |
| 摘 要： | 应用ECOMSED模型输出、运动方程简化等方法,研究了珠江口磨刀门河口动力平衡的特点。研究表明:在磨刀门河口动力平衡中,纵向的主要平衡项为压力项和垂向涡动摩擦项,侧向的主要平衡项为侧向正压力项和科氏力项。正压力为磨刀门河口动力的主导因素,但在枯季动力平衡中,斜压力也是不可忽略的项。人类活动对磨刀门河口动力最主要的影响是改变了正压力项的大小,近几十年来,磨刀门河口正压力呈减小的趋势。 |
| 关 键 词： | 磨刀门河口 动力 平衡 |
| 文章编号： | 1005-9865（2006）02-0053-08 |
| 收稿时间： | 2005-07-06 |
| 修稿时间： | 2005-07-06 |
Study on dynamic balance characteristics of the Modaomen estuary of the Pearl River and impacts of human activities |
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| JIA Liang-wen,WU Chao-yu,REN Jie. Study on dynamic balance characteristics of the Modaomen estuary of the Pearl River and impacts of human activities[J]. The Ocean Engineering, 2006, 24(2): 53-60 | |
| Authors: | JIA Liang-wen WU Chao-yu REN Jie |
| Affiliation: | 1. Guangdong Provincial Waterway Bureau, Guangzhou 510115, China; 2. Coastal Ocean Research Center of Zhongshan University, Guangzhou 510275, China |
| Abstract: | The ECOMSED model output and the simplification of the Reynolds equation are employed in this paper to study the characteristics of the dynamic balance of the Modaomen Estuary of the Pearl River.The study shows that the longitudinal component of the pressure force is mainly balanced by the vertical eddy frictional term and the lateral component of the pressure force is mainly balanced by the Coriolis force.The barotropic force is the dominant dynamic factor in the Modaomen estuary,but the baroclinic force is also important during the dry season.The most important impact of the human activities on the estuarine dynamics of the Modaomen estuary lies in altering the barotropic force,which decreases generally in recent decades. |
| Keywords: | Modaomen estuary dynamics balance |
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