The impact of physical processes on pollutant transport in Hangzhou Bay  

作　　者：李宁 毛志华 张庆河 

机构地区：[1]School of Civil Engineering,Tianjin University [2]Key Laboratory of Harbor and Ocean Engineering,Ministry of Education of China [3]State Key Laboratory of Satellite Ocean Environment Dynamic,Second Institution of Oceanography,State Oceanic Administration

出　　处：《Chinese Journal of Oceanology and Limnology》2009年第2期266-276,共11页中国海洋湖沼学报（英文版）

基　　金：Supported by the Natural Science Foundation of China (No.40576080);National High Technology Research and Development Program of China (863 Program, No. 2007AA12Z182)

摘　　要：A Lagrangian tracer model is set up for Hangzhou Bay based on Coupled Hydrodynamical Ecological model for Regional Shelf Sea (COHERENS). The study area is divided into eight subdomains to identify the dominant physical processes, and the studied periods are March (the dry season) and July (the wet season). The model performance has been first verified by sea-surface elevation and tidal current observations at several stations. Eight tracer experiments are designed and Lagrangian particle tracking is simulated to examine the impact of physical processes (tide, wind and river runoff) on the transport of passive tracer released within the surface layer. Numerical simulations and analysis indicate that: (1) wind does not change the tracer distribution after 30 days except for those released from the south area of the bay during the wet season; (2) the tide and the Qiantang River runoff are important for particle transport in the head area of the bay; (3) the Changjiang River runoff affects the tracer transport at the mouth of the bay, and its impact is smaller in the dry season than in the wet season.A Lagrangian tracer model is set up for Hangzhou Bay based on Coupled Hydrodynamical Ecological model for Regional Shelf Sea （COHERENS）. The study area is divided into eight subdomains to identify the dominant physical processes, and the studied periods are March （the dry season） and July （the wet season）. The model performance has been first verified by sea-surface elevation and tidal current observations at several stations. Eight tracer experiments are designed and Lagrangian particle tracking is simulated to examine the impact of physical processes （tide, wind and river runoff） on the transport of passive tracer released within the surface layer. Numerical simulations and analysis indicate that： （1） wind does not change the tracer distribution after 30 days except for those released from the south area of the bay during the wet season; （2） the tide and the Qiantang River runoff are important for particle transport in the head area of the bay; （3） the Changjiang River runoff affects the tracer transport at the mouth of the bay, and its impact is smaller in the dry season than in the wet season.

关 键 词：Hangzhou Bay pollutant transport COHERENS tracer experime 

分 类 号：X55[环境科学与工程—环境工程]