摘要
三峡水库蓄水运用以后,下游河段来水来沙发生改变,河床发生了冲淤调整。基于该河段建库后原型观测资料,分析了近期鲇鱼套港区河道的冲淤变化情况,并结合本河段的水流泥沙特性,阐述了该河段的演变机理。分析计算表明:本河段河势基本稳定,受清水下泄影响,整个河段包括鲇鱼套港区以冲刷为主;受潜洲尾部淤长影响,武昌深槽头部有所淤积后退;鲇鱼套港区潜洲右槽部分河槽被冲刷挤压,断面形态有窄深化趋势,如果遇到大水年潜洲尾部的淤长势必影响港区的顺利通航及航行安全。
Since the impoundment and utilization of the Three Gorges reservoir, water and sediment to the downstream reach has changed, resulting in the erosion of the bed. Based on the prototype observation data of the reach after construction of the Three Gorges reservoir, we analyze the silting and erosion of fiver bed of Nianyutao, and explore the evolution mechanism combining with the characteristics of flow and sediment. The analyzing and calculation results show that the fiver of this reach maintains stable basically, the whole reach containing Nianyutao harbor area appears mainly scouting affected by the discharging of the clear water;, The head of the Wuehang deep trough has some siltation and retreat, affected by the siltation and lengthening of the Qianzhou shoal; The right channel of Qianzhou shoal is scoured and extruded, and the cross sections turn to be narrow and deep. If encountered flood year, the siltation and lengthening of the Qianzhou shoal tail will have an unfavorable influence on the smooth and safe navigation.
出处
《水运工程》
北大核心
2009年第12期40-43,共4页
Port & Waterway Engineering
基金
国家科技支撑计划项目(2006BAB05B03-05)
976项目(2003CB415205)
国家自然科学基金项目(50479036)
湖北省创新群体基金项目(2003ABA195)
博士点基金项目(20020486017)
关键词
武汉河段
鲇鱼套港区
三峡水库
冲淤演变
Wuhan waterway
Nianyutao harbor area
Three Gorges reservoir
erosion and siltation
