WORLD HISTORY

Detailed explanation-1: -Over the years, the Chinese have tried to control the Yellow River by building higher levees, digging channels and building dams. Dams have tended to be the most helpful in controlling floods, but the river’s thick silt has clogged many of them.

Detailed explanation-2: -Throughout most of its history, China has attempted to control the Huang He by building overflow channels and increasingly taller dikes, and in 1955 the Chinese embarked on an ambitious 50-year construction plan and flood-control program.

Detailed explanation-3: -The levees were built in part because of increasing erosion upstream, which was caused by more intensive agriculture and the expansion of the growing Chinese civilization.

Detailed explanation-4: -♦ Yu on Flood Control With the help and support of the locals he dug canals on the usually flooded areas and dredged the rivers with outlets leading to the sea. For 13 years, he dedicated his time and strength to this project without going home even when his wife gave birth to their son Qi.