On ecological flow influence of hydroelectric cascade development and compensating measures

The watershed ecosystem influence of the hydroelectric cascade development has become an emphasis and difficulty when assessing the water resources for construction projects. It is the problem that the Guideline for assessment of water-draw and utilization in construction projects(for trial implementation) needs to be solved urgently. To help assess water-draw and utilization in hydropower station and provide the basis to revise the Guideline for assessment of water-draw and utilization in construction projects (for trial implementation), and achieve harmonious with human being, this paper puts emphasis on the two aspects of watershed ecosystem and hydrological regime to analyse the impact of watershed ecosystem by cascade hydropower stations and puts forward corresponding effective measures. This will be a certain theoretical meaning and practical guiding role to hydropower cascade development research and water resources assessment.