中文摘要：

一个 Lagrangian tracer 模型为地区性的架海(COHERENS ) 基于联合 Hydrodynamical 生态的模型为 Hangzhou 海湾被建立。学习区域被划分成八子域识别主导的物理过程，并且学习时期是三月(旱季) 和 7 月(湿季节) 。模型表演被海表面举起和潮汐的当前的观察首先在几个车站验证了。八个 tracer 实验被设计， Lagrangian 粒子追踪被模仿在在表面层以内释放的被动 tracer 的运输上检验物理过程(潮，风和河流量) 的影响。数字模拟和分析显示那：(1 ) 风不除了在湿季节期间免除海湾的南方区域的那些在 30 天以后改变 tracer 分发；(2 ) 潮和 Qiantang 河流量为在海湾的头区域的粒子运输是重要的；(3 ) Changjiang 河流量在海湾的嘴影响 tracer 运输，并且它的影响比在湿季节在旱季是更小的。

英文摘要：

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.