The process of diffusion and transportation of COD around the radial sand ridges in the Huanghai Sea Zhu Yu-xin Zhang Guang-yu Tianjin Research Institute of Water Transport Engineering Tianjin Research Institute of Water Transport Engineering Tianjin,China Tianjin,China Zhuyx500@ Wang ying Tianjin Research Institute of Water Transport Engineering Tianjin,China ruozhu1106@ Abstract—It applies hydrodynamic Model to simulate COD of The model takes advantage of the Delft3D modeling sewage around Xiaoyangkou, Rudong City, Jiangsu Province in system (WL| Delft Hydraulics, 2001). Delft3D system is a this paper. Curvilinear orthogonal grid is used in interesting flexible, modular modeling posed of a number of area, and hydrodynamics and water quality model are used to modules, Using it can investigate hydrodynamics, sediment the current velocity field and tidal level field both on case of the transport and morphology and water quality for fluvial, spring and the neap tide. putational results are estuarine and coastal environments. compared with measured field data around drain. It shows that Depth-averaged Governing Equations the simulation results are consistent with field data. In each case In order to study the distribution of CODMn when sewage of spring and neap tide , velocity and direction play an important is discharging, using
