通过物理模型试验 ,研究了黄河下游朱家屋子至西河口河段挖河固堤启动工程的减淤效果及水位变化。研究结果表明 ,挖河后的水面比降调整与挖河水深的 - 2次方成正比 ;不论挖河断面大小 ,其水面比降的调整规律是基本一致的 ;在一定的时段和试验水沙条件下 ,挖河有一定的减淤效果 ,挖沙减淤比为 0 .76左右 ;开挖段的回淤量对挖河减淤效果影响很大 Through the physical model test, the sedimentation effect and water level change of dredging and embankment embankment construction in Zhujiawuzi to Xihekou section of the lower Yellow River have been studied. The results show that the surface water cut ratio after digging the river is proportional to the square root of the digging river depth. No matter the size of the digging river, the regulation law of its surface water level is basically the same. At certain period of time, Under the conditions, the dredging river has a certain effect of reducing sedimentation, dredging silt reduction ratio is about 0.76; dredging section of the amount of silt dredging damming effect greatly affected