What is the impact of Danjiangkou reservoir dam heightening on geography?

First, the storage capacity and water area of the reservoir area are increased, the evaporation and precipitation around the reservoir area are increased, and the temperature difference between day and night in the reservoir area is reduced; The second is to reduce the discharge, which affects the water quantity in the area below Danjiangkou Reservoir in Hanjiang River, and affects the downstream shipping and industrial and agricultural water use; Third, it is conducive to the South-to-North Water Diversion Project, expanding the irrigation area of Danjiangkou Reservoir, reducing the flood disaster in the Han River, and being conducive to flood control and drought relief in the Yangtze River. Fourth, the change of ecological environment in the reservoir area may breed bacteria and pests and endanger people's health.