CAJ | 학술논문

为了把握洪水泥沙过程对黄河下游游荡型河段河床冲淤调整的影响，通过平面二维水沙数值模拟与实测资料分析，进行了不同水沙过程下黄河下游河道冲淤规律的探讨。研究发现不同洪水泥沙过程对河槽的调整塑造有明显不同的影响，大洪峰流量塑造的河槽在非洪峰期难以维持原有输沙强度。主槽累积刷槽效应与洪水泥沙过程有很好的响应关系，塑造出最适宜河床断面形态的洪水过程才能实现最佳输沙效率。在不同量级漫滩洪水条件中，对应洪峰6000 m3／s的洪水过程，塑造的断面形态具有最大累积刷槽效应，故可采用其作为黄河下游漫滩洪水的调控指标。
위료파악홍수니사과정대황하하유유탕형하단하상충어조정적영향，통과평면이유수사수치모의여실측자료분석，진행료불동수사과정하황하하유하도충어규률적탐토。연구발현불동홍수니사과정대하조적조정소조유명현불동적영향，대홍봉류량소조적하조재비홍봉기난이유지원유수사강도。주조루적쇄조효응여홍수니사과정유흔호적향응관계，소조출최괄의하상단면형태적홍수과정재능실현최가수사효솔。재불동량급만탄홍수조건중，대응홍봉6000 m3／s적홍수과정，소조적단면형태구유최대루적쇄조효응，고가채용기작위황하하유만탄홍수적조공지표。
In order to clarify the influence of flood -sediment process on the channel morphology in wandering reach of the Lower Yellow River , the scouring -silting characteristics under different flood -sediment processes have been inquired by the methods of 2-D water-sediment numerical simulation and measured data analysis.It is shown that different flood-sediment processes have significantly different effects on shaping the main channel , and the channel molded by the big flood peak can hardly maintain the original intensity of the sediment transportation during non -peak flood periods . The cumulative scouring effects of the main channel have good response to the flood -sediment process , and the flood process can realize the best efficiency of the sediment transport by forming the most appropriate cross -section morphology of the channel . Among various magnitudes of the overbank flood processes ,only the process (Qmax=6 000 m3/s) can obtain the best cumulative scouring efficiency by shaping the proper cross-section morphology . Therefore , the corresponding discharge can be considered as a regulation indicator of the overbank floods in the Lower Yellow River .