“…Based on the establishment of hydrodynamic model, through understanding the characteristics of different algae, a perfect physical and biological coupling algae model is gradually established to simulate its source, growth, movement, extinction and other processes. Based on the particle tracking models applied to large sea areas or harbors, such as the growth and drift model of the Yellow Sea green tide (Gao et al, 2021), the migration and diffusion model of the Qinhuangdao red tide (Kuang et al, 2016), the diffusion model of alien phytoplankton in the Bohai Bay (Zhang et al, 2021), and the Alexandrium catenella red tide in the Gulf of Maine (Li et al, 2020b), this study also used the particle tracking model to study the small-scale red tide that occurred in the PRE on the basis of ignoring the biological process. The model can well reproduce the development process of the red tide in the PRE, and can make up for the shortage of remote sensing data and measured data.…”