MODELING LIFE CYCLE OF CYANOBACTERIA IN RESERVOIRS

Blue-green algae and mold smell are some of the major water quality problems in closed waters in Japan. It is important to understand the life cycle of algae to clarify these phenomena. The same individual becomes akinete and accumulates on the bottom of the lake. Once it goes out of the system, it germinates again and then returns to the system and multiplies. In this study, we have constructed a life cycle model of algae with reference to past studies abroad and constructed a water quality model expressing the algae growth using the particle tracing model. In addition, the occurrence of the green algae in a certain reservoir was simulated. As a result, the applicability of the model was confirmed such that the reproducibility of rapid algal growth, which is thought to be caused by the germination and levitation of akinete cells on the sediment, improved compared to the conventional Eulerian model.