长江口北槽泥沙起动流速研究  

Research on incipient velocity in North Passage of Yangtze River Estuary

作　　者：张俊勇[1,2] 吴华林 陈立[3] 

机构地区：[1]河口海岸交通行业重点实验室,上海201201 [2]交通部长江口航道管理局,上海200003 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《泥沙研究》2012年第1期37-40,共4页Journal of Sediment Research

基　　金：交通部西部交通科技项目"全沙物模可行性研究"(NO.200632800075)

摘　　要：在大量实测资料分析、室内水槽试验和现场坐底观测试验的基础上,对长江口北槽泥沙起动流速特性进行了分析研究。首先分析了北槽河床质实测资料,明确了北槽中段河床组成特性。通过北槽天然沙的室内水槽试验研究了天然沙在浅水区的起动特性。通过北槽现场坐底观测的实测结果分析了北槽实际的泥沙起动特征,其中泥沙起动状态主要通过近底泥沙浓度变化和床面冲淤变化的判定。在以上实测资料的基础上分析了北槽的泥沙起动规律,推荐了在浅水区和深水区适宜的泥沙起动流速经验公式。Based on field data,flume experiment and field riverbed survey,the incipient velocity of sediment in the North Passage of the Yangtze River Estuary is analyzed.First,the riverbed component of the North Passage is analyzed based on field data.Incipient velocity of sediment in shallow water is studied in flume experiment.In deep water it is studied by field riverbed survey.The incipient velocity is recognized by the change of sediment concentration and riverbed scouring and silting.It is concluded that the Sha Yu-qing empirical formula is suitable to calculate the incipient velocity in the North Passage.

关 键 词：起动 水槽试验 坐底观测 

分 类 号：TV142.1[水利工程—水力学及河流动力学]