The Capability Analysis of Flood Discharge in Ningmeng of Yellow River

the amount of water and sediment reduce obviously in Ning Meng reach because of the influence of the regulation of Long-Liu reservoir in upper of Yellow River、rainfall and production and living use water, especially the time reduce of large flows and the growth of small flow duration time, resulting main channel siltation and atrophy severe in the Inner Mongolia Reach, lower bankfull discharge, the main channel flooding capacity decreased when the great flood of water level rise, resulting in the increase of the river's ice flood control pressure. The study will provide technical support for flood control decision-making.