黄河口清水沟流路的河床演变及其影响

黄河口清水沟流路先后经历了游荡型，顺直型和弯曲型和河床演变阶段。与此同时，河流的冲淤变化经历了摆动淤积，造床冲刷和延伸淤积三个阶段，这些变化对河床纵剖面，水位和险情带来了某些较深刻的影响。

THE CHANNEL CHANGES AND THEIR EFFECTS IN THE QINGSHUIGOU STREAM INTO THE ESTUARY OF THE YELLOW RIVER

The Qing Shui Gou Stream into the estuary of the Yellow River experienced the following changing periods: First it began with the wandering channel pattern, then the straight channel pattern, till at last meandering channel pattern. At the same time, the at last meandering channel pattern. At the same time, the scouring and deposition changes of the stram also experienced three periods: 1) the deposition with the channel wandering 2)the scouring which makes the channel formed 3) the deposition which makes the estuary extedn. These changes have some deep effects on the channel longitudinal profiles, the water level and the dangerous situation. The study of these changes and effects is of great instruction to the preventing disasters, the harness and the course change by engineering measures of the estuary reach of the Yellow River.