一种新的S型悬沙垂线分布研究  

An new S-type vertical distribution of suspended sediment concentration

作　　者：丰青[1,2] 肖千璐 

机构地区：[1]河海大学海岸灾害及防护教育部重点实验室,江苏南京210098 [2]河海大学环境海洋实验室,江苏南京210098

出　　处：《泥沙研究》2015年第1期19-24,共6页Journal of Sediment Research

基　　金：海洋公益性行业科研专项(201205005);江苏省2012年度普通高校研究生科研创新计划项目(CXZZ12-0225);国家自然科学基金资助项目(41276017);国家重点基础研究发展计划(2011CB403306)

摘　　要：鉴于众多实验及实测结果中,最大含沙量常不在水体底部的现象,根据Coles非均匀流理论,对Van Rijn流速垂线分布公式进行改进,得到形式更加简单且能够表示最大流速不在水体表层的S型流速垂线分布公式,并以此为基础,推导出可以表示最大含沙量不在底层的S型悬沙垂线分布公式,结构上与王光谦的I型含沙量公式相似,但形式更为简单。采用实验数据及实测数据进行验证,结果表明,该含沙量垂线分布公式可以较好地反映实验及实测中最大含沙量不在水体底部的现象。In consideration of multitudinous results from field data and laboratory flume experiments that the largest sediment concentration is not always at the bottom,the Van Rijn velocity profile formula is modified to obtain an S-type velocity profile formula base on the non-uniform flow theory by Coles,which can describe a number of flow states including the situation that the largest velocity is not at the surface. Further more the Stype vertical distribution formula of suspended sediment concentration is deduced on account of above works.The structure of equation is similar to the I-tpye sediment concentration profile formula by WANG Guang-qian.Adopting the sediment data from tests and measurements to verify the new formula,the consequence indicates the formula is able to reflect objectively the phenomenon that the largest sediment concentration is not at the bottom.

关 键 词：最大含沙量 S型流速垂线分布 S型悬沙垂线分布 

分 类 号：TV142[水利工程—水力学及河流动力学]