The Comparison of Eutrophication Models and Analyze of Their Key Parameters

It discussed the characteristics of three types of eutrophication models,and makes an analysis of the key parameters.The key parameters of single nutrient load models are mean lake depth,hydraulic retention time,settling velocity and vertical exchange coefficient.The key parameters of phytoplankton related to nutrient models are concentration of TP and TN,half-saturation constant and growth rate of phytoplankton.The key parameters of ecological dynamics model can be divided into water quality,physics,biological and water dynamics.The parameters of water quality includes:COD,C,N,P,Chla and the proportion of them.The parameters of physics includes:pH,DO,light intensity and temperature of water.The parameters of biological includes:algal growth rate and algal photosynthesis rate.The first two models are suitable for shallow and steady state water body.The ecological dynamical models are suitable for the water body that is with complex pollution and with large spatial variation.The results can be a reference to the application of eutrophication models and the choice of parameters.