| A model study of influence of circulation on the pollutant transport in the Zhujiang River Estuary and adjacent coastal waters |
| |
| 作者姓名： | WONG Lai Ah GUAN Weibing CHEN Jay-Chung SU Jilan |
| |
| 作者单位： | [1]CenterforCoastalandAtmosphericResearch,HongKongUniversityofScienceandTechnology,HongKong,China [2]KeyLaboratoryofOceanDynamicProcessesandSatelliteOceanographyofStateOceanicAdministration,Hangzhou310012,China |
| |
| 摘 要： | A tracer model with random diffusion coupled to the hydrodynamic model for the Zhujiang River Estuary (Pearl River Estuary, PRE) is to examine the effect of circulations on the transport of completely conservative pollutants. It is focused on answering the following questions: (1) What role does the estuarine plume front in the winter play in affecting the pollutants transport and its distribution in the PRE? (2) What effect do the coastal currents driven by the monsoon have on the pollutants transport? The tracer experiment results show that: (1) the pollutant transport paths strongly depend on the circulation structures and plume frontal dynamics of the PRE and coastal waters; (2) during the summer when a southwesterly monsoon prevails, the pollutants from the four easterly river inlets and those from the bottom layer of offshore stations will greatly influence the water quality in Hong Kong waters, however, the pollutants released from the four westerly river-inlets will seldom affect the water quality of Hong Kong waters due to their transport away from Hong Kong; (3) during the winter when a northeasterly monsoon prevails, all pollutants released from the eight river gates will be laterally transported seaward inside the estuary and transport westward in the coastal waters along the river plume frontal zone. However, pollutants released from the surface layer of offshore stations near or east of the Dangan Channel will be carried into the coastal waters of Hong Kong by the landward component of the westward coastal current driven by the winter northeasterly monsoon. But the pollutants from the bottom layer of the offshore stations will be carried away from the offshore by the bottom flow driven by the northeasterly monsoon. This implies that only surface-released matter from offshore stations will affect the water quality of the coastal waters around Hong Kong during the winter when a northeasterly monsoon prevails.
|
| 关 键 词： | 漫射 循环 水力模型 珠江口 海洋调查 海洋污染 |
| 收稿时间： | 2003/10/11 0:00:00 |
| 修稿时间： | 2004/3/20 0:00:00 |
A model study of influence of circulation on the pollutant transport in the Zhujiang River Estuary and adjacent coastal waters |
| |
| WONG Lai Ah,GUAN Weibing,CHEN Jay-Chung,SU Jilan.A model study of influence of circulation on the pollutant transport in the Zhujiang River Estuary and adjacent coastal waters[J].Acta Oceanologica Sinica,2004,23(2):225-237. |
| |
| Authors: | WONG Lai Ah GUAN Weibing CHEN Jay-Chung and SU Jilan |
| |
| Institution: | 1.Center for Coastal and Atmospheric Research, Hong Kong University of Science and Technology, Hong Kong, China2.Key Laboratory of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, China |
| |
| Abstract: | A tracer model with random diffusion coupled to the hydrodynamic model for the Zhujiang River Estuary (Pearl River Estuary, PRE) is to examine the effect of circulations on the transport of completely conservative pollutants. It is focused on answering the following questions:(1) What role does the estuarine plume front in the winter play in affecting the pollutants transport and its distribution in the PRE? (2) What effect do the coastal currents driven by the monsoon have on the pollutants transport? The tracer experiment results show that:(1) the pollutant transport paths strongly depend on the circulation structures and plume frontal dynamics of the PRE and coastal waters; (2) during the summer when a southwesterly monsoon prevails, the pollutants from the four easterly river inlets and those from the bottom layer of offshore stations will greatly influence the water quality in Hong Kong waters, however, the pollutants released from the four westerly river-inlets will seldom affect the water quality of Hong Kong waters due to their transport away from Hong Kong; (3) during the winter when a northeasterly monsoon prevails, all pollutants released from the eight river gates will be laterally transported seaward inside the estuary and transport westward in the coastal waters along the river plume frontal zone. However, pollutants released from the surface layer of offshore stations near or east of the Dangan Channel will be carried into the coastal waters of Hong Kong by the landward component of the westward coastal current driven by the winter northeasterly monsoon. But the pollutants from the bottom layer of the offshore stations will be carried away from the offshore by the bottom flow driven by the northeasterly monsoon. This implies that only surface-released matter from offshore stations will affect the water quality of the coastal waters around Hong Kong during the winter when a northeasterly monsoon prevails. |
| |
| Keywords: | 3D numerical modeling pollutant matter transport Zhujiang River Estuary |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
