2010年黄河调水调沙期间花园口洪峰增大的成因

对2010年黄河调水调沙期间花园口站出现的洪峰增值现象进行了分析,结果表明:洪峰增大的主要原因是洪水运行过程中,铁谢-逯村间展宽河段内粗颗粒泥沙发生沉积,产生了一个临时的潜水沙坝,造成其上游的蓄水量增加,在水流的持续作用下,沙坝被冲开从而造成了逯村站流量的加大;在洪水波向下游运行的过程中,又产生了沿程河槽的冲刷,流速递增,从而造成了流量进一步加大.

Cause of Formation of Increased Flood Peak at Huayuankou during Regulated Discharge Regime of the Yellow River in 2010

The paper analyzes the phenomenon of increment of flood peak occurred at Huayuankou Station during the regulated discharge regime of the Yellow River in 2010.The outcomes show that a) the main reason of increased flood peak is that the coarse sediment has deposited in the widened river section of Tiexie-Lucun,formed a temporary submerged sand dam and caused the increase of storage of the upper stream during flood.The sand dam has been washed out under the continuous action of flow,causing the increase of di...