Study of Growth Characteristics of Water Bloom in Han River

摘要

Water bloom has appeared at the middle or lower reaches of Han River several times since 1990s, which is a great threat to the domestic water, industrial water, and agricultural water along the river. By using molecular methods, the dominant species of water bloom in Han River have been found to belong among Stephanodiscus. And on this basis, we make comprehensive analysis to the environmental factors that influence the growth of water bloom in Han River. It is shown that temperature, the level of nitrogen and phosphorus are the main factors, with phosphorus having the greatest impact on the growth rate of diatoms in water bloom. Therefore, the effective control of the discharge of phosphorus can prevent the water bloom in Han River.