湖沼における吐出し効果によるアオコ浄化手法の提案及び藻類の比増殖速度に不確実性を考慮した基礎的研究

抄録

The purpose of this study is to propose the method to simply define the required volume of water in order to prevent blue-green algae from growing by flushing out them. More specifically, Considering the eutrophic environment, we propose the simple method to define the safest required volume of water to flush out them. To define it, we used the relationship between the algae’s growth rate and rotation rate by adding an washout effect to the logistic equation which expresses the change of the number of individual organisms. Then, we evaluated applicability of this method by both culture experiment and field observation about the algae. Moreover, we introduce a new framework which solve as probability theory considering an uncertainty that the growth rate of the algae contains by using the relationship among Langevin equation, stochastic differential equation, and Fokker-Planck equation.