黄河头道拐断面河道冲淤变化及河床演变特征分析
发布时间：2019-06-29 15:35
【摘要】：针对近年来黄河内蒙段防洪、防凌形势严峻,河槽萎缩日益加重等问题,分析了黄河内蒙段头道拐断面河床冲淤演变特征。通过同流量水位变化,分析该河段河床冲淤变化发现:该河段在2008年以前呈微淤状态,在2008年以后呈冲刷趋势,并有"凹岸冲刷、凸岸淤积"的特点;依据头道拐水文站的水文资料及遥感数据影像的分析,分别以1987年头道拐河道横向水深变化及平面河势变化为基础分析了2006、2010、2014年头道拐河道的相应变化,发现在水流作用的影响下,弯曲河道凹岸的冲刷速度大于凸岸的淤积速度,河道形成旋涡回流。以上结果均是在水流条件及外界条件的共同作用下造成的,水沙条件变化必将导致河道演变,研究水沙条件变化规律有利于充分认识河床演变规律,为今后解决防洪、防凌问题提供依据。
[Abstract]:In view of the problems of flood control, ice prevention and river channel shrinkage in the inner Mongolia section of the Yellow River in recent years, the characteristics of river bed scouring and silting in the head turn section of the inner Mongolia section of the Yellow River are analyzed. Through the analysis of the change of river bed scouring and silting in the same discharge water level, it is found that the reach shows a state of micro-silting before 2008 and a scouring trend after 2008, and has the characteristics of "concave bank scour and convex bank siltation". Based on the analysis of hydrological data and remote sensing data images of Tou Dao roundabout Hydrological Station, based on the variation of transverse water depth and plane river regime in 1987, the corresponding changes of the first turn channel in 2006, 2010 and 2014 are analyzed respectively. it is found that under the influence of water flow, the scouring speed of the concave bank of the curved channel is greater than that of the convex bank, and the channel forms a vortex reflux. The above results are caused by the combined action of water flow conditions and external conditions, and the change of water and sediment conditions will lead to the evolution of river courses. The study of the change law of water and sediment conditions is helpful to fully understand the evolution law of river bed and provide the basis for solving the problems of flood control and ice prevention in the future.
【作者单位】： 内蒙古农业大学水利与土木建筑工程学院;内蒙古农业大学职业技术学院;
【基金】：国家自然科学基金资助项目(51369021)
【分类号】：TV147
[Abstract]:In view of the problems of flood control, ice prevention and river channel shrinkage in the inner Mongolia section of the Yellow River in recent years, the characteristics of river bed scouring and silting in the head turn section of the inner Mongolia section of the Yellow River are analyzed. Through the analysis of the change of river bed scouring and silting in the same discharge water level, it is found that the reach shows a state of micro-silting before 2008 and a scouring trend after 2008, and has the characteristics of "concave bank scour and convex bank siltation". Based on the analysis of hydrological data and remote sensing data images of Tou Dao roundabout Hydrological Station, based on the variation of transverse water depth and plane river regime in 1987, the corresponding changes of the first turn channel in 2006, 2010 and 2014 are analyzed respectively. it is found that under the influence of water flow, the scouring speed of the concave bank of the curved channel is greater than that of the convex bank, and the channel forms a vortex reflux. The above results are caused by the combined action of water flow conditions and external conditions, and the change of water and sediment conditions will lead to the evolution of river courses. The study of the change law of water and sediment conditions is helpful to fully understand the evolution law of river bed and provide the basis for solving the problems of flood control and ice prevention in the future.
【作者单位】： 内蒙古农业大学水利与土木建筑工程学院;内蒙古农业大学职业技术学院;
【基金】：国家自然科学基金资助项目(51369021)
【分类号】：TV147
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