Eco-environmental Problems of the Water-level-fluctuating Zone in Three-gorges Reservoir and Their Countermeasures

After the accomplishment of Threegorges reservoir, a 30 meters high waterlevelfluctuating zone (WLFZ) will appear along with the both banks, and become a kind of seasonal humid ecosystem. According to the program to store water of Threegorges reservoir, the ecological and environmental problems which will probably appear in WLFZ are discussed such as formation of contaminated zone along both banks, appearance of epidemic diseases in reservoir (including Chongqing urban districts), aggravation of geologic disaster, injury of biodiversity and intensifying of ecosystem fragile, etc. To counter the causes, distributed features and trends of ecological and environmental problems existing probably in WLFZ of Threegorges reservoir, the authors put forward six items of corresponding countermeasures.