三峡库区重庆主城区河段河床演变分析  

Analysis of river channel variation of urban reach of Chongqing city in TGP reservoir area

作　　者：代文良 张娜 

机构地区：[1]长江水利委员会长江上游水文水资源勘测局,重庆400014

出　　处：《人民长江》2009年第3期1-3,共3页Yangtze River

基　　金：国家"十一五"科技支撑计划重点项目(2007BAB21B01-01A)

摘　　要：三峡工程建成后,重庆主城区河段处于水库变动回水区,水流条件和泥沙运动规律将发生变化,该河段泥沙冲淤变化的分析研究,备受有关方面关注。根据2007年及多年所监测的来水来沙资料及河道观测资料,对重庆主城区河段的泥沙冲淤变化规律进行初步分析,结果表明:重庆主城区河段冲淤量主要与来水来沙条件、河道形态、两江相互顶托等因素有关;2007年重庆主城区河段冲淤主要分布在开阔段的缓流、回流区等部位;主要淤积期为6月中旬至7月中旬、9月中旬至11月中旬,主要冲刷期分别为年初至6月中旬、8月中旬至9月中旬、11月中旬至年末;全年略呈冲刷态势。After completion of TGP,the river reach at main urban area of Chongqing city became backwater fluctuation zone,the flow condition and sediment movement law will change,so the research on scouring and silting variation of this reach is concerned by all social sectors.According to river channel observation data in 2007 and past years,the variation law of sediment scouring and silting in the river channel at main urban area of Chongqing city is analyzed.The results show the scouring and silting volume in the river channel at urban area of Chongqing city mainly relates with factors of flow and sediment condition,river channel form,mutual flow jacking of the Yangtze River and the branch of the Jialing River etc.The scouring and silting in the river reach at main urban area of Chongqing city mainly distributed in slowing zone of widen area and backwater zone,the main silting period is from mid-June to mid-July,mid-September to mid-November,the main scouring periods are from the early day of the year to mid-June,mid-August,mid-November to the end of the year,the river channel was scoured slightly.

关 键 词：河床演变 冲淤分析 重庆主城区 三峡库区 

分 类 号：TV147[水利工程—水力学及河流动力学]