2019 Volume 7 Issue 1 Pages 185-192
A new critical depth (zcr) model was developed by adding light saturation effects during photosynthesis to a Sverdrup zcr model in order to design an artificial circulation system as a countermeasure to eutrophication. A Blackman-type equation was selected from various P-I equations for its accuracy and relationship to the original Sverdrup model. Quantitative differences between the zcr values of some new equations were found to be remarkable in specific high light conditions. Furthermore, the zcr calculated by the Sverdrup model overestimated the zcr compared to the modified Sverdrup equation proposed by this research. We discuss methods for the design of a practical air diffuser depth that prevents cyanobacteria bloom from the point of view of design and management of bubble circulation countermeasures.
