Recently the eutrophication has been an important environmentalproblem of the water resources management. The extensive nutrient elementsin the water are the causes of the eutrophication. Among the main elements,the nitrogen and phosphorus are the main controlling factors, and in manylakes the phosphorus is the restricting factor of the phycophyta's growth. Thispaper is completed based on the fifth topic——“The Water EnvironmentPollution,the Pollution Transport and Environmental Effects of the MiyunReservoir...