Effects of hydraulic projects in san-hua reach of the yellow river to floods and runoff

摘要

The two multi-purpose reservoirs of Luhun and Guxian can basically control the coming water from upper stream and can reduce flood peaks and flood volume of the San-Hua reach. The effects of medium and small-sized reservoirs in the San-Hua reach to floods are mainly function of retaining and storage and usually the function is small Groups of medium small-sized reservoirs have greater influence to the peak discharge and runoff volume of an individual flood and smaller influence to an individual flood of continuous floods.