The project is headed by Deng Bing a sub-project of “Water Environment Diagnosis and Ecological Security Safeguard under Different Water Level”, which is supported by MOST National Scientific and Technological Key Special Program. The partners are China Institute of Water Resources and Hydropower Research, Institute of Remote Sensing Applications of Chinese Academy of Sciences, Institute of Environment of Chongqing Province, East China Normal University, and Huazhong Agricultural University. It aims to 1) describe the effect of the dam on hydrodynamics process of the reservoir area and the water bloom area, and migration, diffusion and transformation process of nutrients; 2) clarify environmental consequence of water exchange process; 3) describe the influx change of bioavailable nutrients into the reservoir; 4) characterize the direct and indirect impact of high water level on euphotic zone; 5) simulate eco-dynamic mechanism of the formation and disappearance of water bloom; 6) simulate the physical-ecological process of the formation and disappearance of water bloom; 7) assess middle-term and long-term risk of water bloom; 8) propose optimum strategy for water bloom control.