床沙质与冲泻质划分的新方法  

NEW APPROACH TO DIFFERENTIATING WASH LOAD AND BED MATERIAL LOAD

作　　者：黄才安[1] 赵晓冬[2] 

机构地区：[1]扬州大学水利与建筑工程学院水利水电工程系,江苏扬州225009 [2]南京水利科学研究院河港研究所,江苏南京210024

出　　处：《扬州大学学报（自然科学版）》2003年第1期61-65,共5页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省教育厅自然科学基金资助项目 (0 0 KJB5 70 0 0 2 ) ;江苏省高校省级重点实验室开放课题 (KJS0 10 6 0 )

摘　　要：从床沙质能与床沙交换而冲泻质不能与床沙交换这一定义出发 ,利用泥沙运动的起动和止动条件分析了床沙质与冲泻质划分的内在机理 .根据这一划分机理 ,在引入适当的泥沙起动和止动公式后 ,即可求出床沙质与冲泻质的分界粒径 .验证计算表明 ,此方法理论概念正确 ,计算结果合理 。Started from the concept that bed material load can exchange with bed material while wash load cannot exchange with bed material, the inherent mechanism of delimiting between bed material load and wash load is analyzed by using of sediment incipient motion condition and sediment ceasing motion condition. Based on this mechanism, the critical sediment diameter between bed material load and wash load can be determined after introducing the appropriate sediment incipient motion and ceasing motion equations. Results of verifications show that the method proposed by this paper is correct in theory, reasonable in results, and simple in computations.

关 键 词：床沙质 冲泻质 划分方法 划分机理 分界粒径 泥沙运动 床沙 悬移质 

分 类 号：TV142[水利工程—水力学及河流动力学]