Two-layered, 2D unsteady eutrophication model in boundary-fitted coordinate system

摘要

The decline of water quality in Tolo Harbour in recent years is an example of eutrophication. This paper delineates a robust unsteady two-layered, 2D finite difference numerical model for eutrophication in coastal waters. The modelling is based upon the numerically generated boundary-fitted orthogonal curvilinear grid system and integrated with a hydrodynamic model. It simulates the transport and transformation of nine water quality constituents associated with eutrophication in the waters, i.e. three organic parameters(carbon, nitrogen and phosphorus), four inorganic parameters(dissloved oxygen, ammonia, nitrite + nitrate and or- thophosphate), and two biological constituents(phytoplankton and zooplankton).