CONCLUDING REMARKS
TELEMAC2D was set up at the Lvsi Port area in Jiangsu Province at the east coast of China to study the impacts of the treated wastewater discharged into the Yellow Sea on the coastal water quality and marine environment in the area. Concentrations of CODMn and Nitrogen are modelled under the tidal conditions with three scenarios pertaining to different operational conditions of a wastewater treatment plant and a reclaimed water plant. The results show that when both plants are operating under normal full capacity conditions, the treated wastewater discharged into the sea poses no threat to the water quality and marine environment under the current regulations. However, when the untreated wastewater is discharged into the sea, it will pose a significant threat to the water quality. The concentration of Nitrogen in particular will be much higher than the regulatory limits, and the affected area is much larger than that is allowed. Therefore, appropriate mitigation measures must be put in place to reduce the risk of environmental disaster in the area should those conditions occur. The model has provided useful information to help assess the coastal environment and ecological system, but the work can be improved by, for example, including the wave effects and 3-dimensionality.