Modeling the Effects of Hydrodynamics on Thermal Stratification and Algal Blooms in the Xiangxi Bay of Three Gorges Reservoir

Algal blooms have been reported in some tributary bays since the initial impoundment of Three Gorges Reservoir, which has seriously affected water ecology and drinking safety. Hydrodynamics plays a crucial role algae growth. The recent numerical models hydrodynamics quality are effective to identify effects on phytoplankton find potential strategies for controlling algal blooms. In this study, CE-QUAL-W2 model was applied simulate Xiangxi Bay (XXB) Reservoir. performed well simulating flow patterns, temperature profile, results indicated that showed spatial temporal differences XXB. mouth area, intensity plunge depth density currents were dynamic characterized by typical seasonal pattern. transformation from interflow overflow will provide more opportunities vertical mixing, resulting un-stratification reducing However, middle upper areas, strong stratification low velocity at upstream enough favorable conditions growth increase simulation revealed variation mixing explains Chl.a. It played vital dynamics succession