The purpose of the study is to emphasige the view and measurement of environment protection.Importance shoued be attached to the harmful effects in environmental assessment of projects.

• 有利影响从五个方面进行了分析，不利影响是根据开发项目的不同阶段，即建设期、初期蓄水期和运行期三个阶段产生的主要环境问题进行了分析。