Sedimentation and cross-section regulation in different periods in the Lower Yellow River

The Yellow River is famous as its excessive sediment and insufficient water. The sedimentation is influenced by the variation of incoming water and sediment and controlled by river boundaries. The dykes along the two banks can take an important role during flood events but increase the sediment silting rate of the river course. Longitudinal and transverse regulations vary with incoming water and sediment. The silting rate in the main channel is bigger than that in floodplains. In some local reaches the second suspended river are very serious. At present the withered river is caused by some water and sediment condition and the cross section will be regulated toward good condition with the advantage incoming water and sediment.