刘小丽,习刚正,刘明珠

• 1:山东省海洋环境地质工程重点实验室
• 2:中国海洋大学环境科学与工程学院

摘要(Abstract)：

基于海床土体变形、渗流和溶质运移的耦合数值计算模型,考虑波浪沿沙丘状海底地形传播的浅水效应,本文分析了沙丘状海床内部孔隙水渗流特征和海水中溶质进入沉积物的运移特征,并通过与平底海床计算结果的对比,分析了沙丘状海底地形对溶质迁移的影响特征。结果分析表明,相对于平底海床,沙丘状海床一定深度内孔隙水渗流呈现明显的二维特征,进一步加速了溶质在沉积物中的迁移速率;对于沙丘状海底,对流和水动力弥散均有效促进了溶质向沉积物中的迁移,其中,对流作用相对稳定,而水动力弥散作用随着波浪作用时间的增加而不断减弱。参数分析表明,沙丘地形对溶质运移过程的影响程度基本不受波高的影响,但其随着波浪周期、水深和坡角的增大而增大,随着剪切模量和渗透系数的增大而减小,其中坡角的影响最为显著。

关键词(KeyWords)： 波浪;沙丘状海底地形;溶质迁移;土体变形;渗流

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41807247)资助~~

作者(Author): 刘小丽,习刚正,刘明珠

DOI: 10.16441/j.cnki.hdxb.20210001

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