东南大学学报（自然科学版）2024，Vol.54Issue(2)：360-367,8.DOI:10.3969/j.issn.1001-0505.2024.02.013
三维地形条件下雨水入渗与地表径流耦合分析
Coupled analysis of rainwater infiltration and surface runoff under three-dimensional topographic conditions
摘要
Abstract
To quantitatively describe the distribution and variation of soil moisture in the three-dimensional(3D)slope at different moments after rainfall,a coupled model of rainwater infiltration and surface runoff was established based on the finite volume method.The two-dimensional incompressible Navier-Stokes equation and 3D nonlinear Richards equation were used as the governing equations for surface runoff and groundwater seepage,respectively.The coupled model has superior applicability under complex 3D topographic conditions.The analysis results of an actual project indicate that,under the control of 3D topographic factors,surface run-off caused by rainfall mainly converges in the dominant runoff pathway that flows from high to low overall,and has a delayed response to changes in rainfall intensity.Under the influence of surface runoff,the depth of surface water accumulation shows a significant uneven distribution in local space,with much greater accumula-tion in low-lying areas compared with high elevations,and this non-uniformity intensifies over time.High hy-draulic gradient generated by the accumulation of surface water causes more intense and persistent infiltration in low-lying areas.Research indicates that the coupled model of rainwater infiltration and surface runoff consider-ing 3D topographic factors can provide accurate and reasonable data support for the slope stability analysis in practical engineering.关键词
地表径流/降雨入渗/耦合模型/三维地形/数值模拟Key words
surface runoff/rainfall infiltration/coupled model/three-dimensional topography/numerical simulation分类
建筑与水利引用本文复制引用
韩同春,刘航,刁玲怡,施展斌,吴俊扬..三维地形条件下雨水入渗与地表径流耦合分析[J].东南大学学报（自然科学版）,2024,54(2):360-367,8.基金项目
浙江省自然科学基金资助项目(LY18E080006). （LY18E080006）
