Water in the Yellow River is charged with much silt. The mean volume of silt flow reaches 1

6 billion tons a year，and a cubic metre contain about 35 kg

The Yellow River is famous for much silt in the world

so it is. called "silt river"

The river course of lower reaches of the river burst frequently in history

resulting in a heavy disaster to the people. Since the foundation of the new China

the soil and water conservation work in the middle and upper reaches has been made extensively

the large

middle and small type of reservoir and a great number of silt arresters and terrace have been constructed; and the trees and grasses have been planted extensively

so that the volume of silt flow into the Yellow River can be controlled. Although we have won great successes in the works above

we must not become unrealistically optimistic. We have to know that harnessing the Yellow River is an arduous and long-term task. We must not lower our guard.