摘要
用饱和-非饱和达西渗流理论对降雨入渗的复杂渗流场问题用有限单元法求解,在理论上进行了深入的研究。文中特别提出了降雨入渗边界条件及非饱和逸出面边界条件(包括降雨中间停雨时期边界条件)在渗流场求解中的正确处理方法,提出和定义了描述土体渗流特性的极限含水率和蒸逸系数的两个新概念。两个算例的数值试验也进一步表明,文中所用的降雨入渗渗流场分析方法结果合理,实用性强。
The finite element method is applied to solve the complicated Darcy's saturated-unsaturated seepage problem caused by raining infiltration.In the solution,the boundary conditions of raining infiltration and unsaturated exit surface of seepage are strictly processed numerically.Two new concepts and definitions of extreme rate of water content and evaporation coefficient of porous seepage media are proposed.The reasonability of the proposed method is verified by two examples.
出处
《水利学报》
EI
CSCD
北大核心
2003年第12期66-70,75,共6页
Journal of Hydraulic Engineering
基金
教育部年轻骨干教师资助项目(教技司65 10)
南京市人事局基金资助项目(宁人字 2000 4)
科技部中奥合作资助项目(2001 Ⅵ B 1)
江苏省科技厅资助项目(BZ2003046)
关键词
饱和-非饱和渗流
降雨入渗
非饱和逸出面
极限含水率
环境湿度
蒸逸系数
saturated-unsaturated seepage
raining filtration
unsaturated exit surface
extreme rate of water content
coefficient of water evaporation
