Abstract:

The increasing human activities coupled with natural factors such as climate change,have resulted in increasingly prominent water threats in the Yangtze River,including water environment,water hazards and water ecological problems.This paper macroscopically analyzes water problems that the Yangtze River is facing,including deterioration of water quality in part of the main reaches of the River and the Three Gorges Reservoir bay and its tributaries,eutrophication of lakes,heavy flooding disaster resulted from low rainfall,seasonally water shortage in lake plain areas,and biological resources degradation in the River and the lakes.The anthropic factors including accelerating industrialization and urbanization at watershed scale,rapid land use/cover change,construction of a series of key hydraulic projects,excessively exploit of lake resources,as well as the natural factors such as climate change which impact the water problems in the Yangtze River are revealed.Prevention and controlling strategies related to those water problems are put forward,including encouraging regional exploitation in order,promoting integrated watershed management,and optimizing the operation of the key hydraulic projects