Modelling of Water Circulation and the Dynamics of Phytoplankton for the Analysis of Eutrophication.

摘要

The eutrophication and algal blooms are problems in many Finnish lakes and sea areas. One possible way to approach the problem is mathematical modeling. If the most important processes have been successfully modeled, it is easy to calculate the effects of nutrient load changes. This thesis presents experiences on developing and applying eutrophication models. The pre-calculated flow fields are the most important input to the water quality model, so the applications of the flow model are examined in two papers. The results indicate that the flow model can produce typical flows caused by wind. The simulations of the timing of upwelling were also successful. The excessive vertical diffusion can cause problems in eutrophication model applications.