论文部分内容阅读
黄河清水沟流路１９７６年改道行河至今已２０年，西河口以下河道长度接近改道前老河道长度，河口淤积延伸，流路变迁，仍是其发展的必然趋势，因此，河口状况如何，关系着黄河下游的安危，及时掌握清水沟流路的演变趋势是非常必要的。本文通过对黄河口的演变特性，输沙特性及河道纵比降变化进行分析研究，预估清水沟流路的演变趋势及延伸距离。
The Qingshuigou channel of the Yellow River has been re-diverted to the river for about 20 years since 1976. The length of the channel below the Xihekou is close to the length of the old channel before the diversion. Silting of the estuary extends and the flow path changes are still the inevitable trend of its development. Therefore, With the safety of the lower Yellow River, it is very necessary to grasp the evolving trend of Qingshuigou channel in time. In this paper, the evolvement characteristics of the Yellow River estuary, the characteristics of sediment transport and the vertical and horizontal drop of the river channel are analyzed and studied to predict the evolution trend and the extension distance of the Qingshuigou channel.