Algal blooms hit South Korean rivers

Quoted: Jae Park, an environmental engineer at the University of Wisconsin?Madison, agrees. He says that a combination of plenty of sunlight and high levels of nutrients in the rivers, rather than slower flow speeds, is responsible for the the algal outbreak. In fact, the algae do not seem to thrive in water deeper than 3 metres, so by creating a number of deep reservoirs, the dams have helped to curb algal growth.