摘要
利用土壤对雨水的蓄存和滤渗作用可降低城市排水的径流峰值且能补充地下水。基于土壤饱和–非饱和的入渗理论,模拟在一维竖直方向恒定流入渗的条件下,土壤含水量沿深度及时间的动态变化规律。使用含水率为变量建立水分运动数学方程,将水–热–力通过水分扩散等系数添加入水分方程中进行迭代运算,并利用土柱试验验证仿真结果,结果显示模型计算结果与实测有较高的一致性,最大误差为4.5%,能较好地描述降雨入渗的动态过程。
The use of soil for the storage and infiltration of rainwater can reduce the peak runoff of urban drainage and can supplement groundwater. Based on the soil saturated-unsaturated infiltration theory, the dynamic variation of soil water content along depth and time is simulated under the condition of constant infiltration in the vertical direction. The moisture equation is used to establish the mathematical equations of water motion. The water-heat-force is added to the water equation through the moisture diffusion coefficient to perform iterative calculations. The soil column experiment is used to verify the simulation results. The results show that the model calculation results the measured results are highly consistent with a maximum error of 4.5%, indicating that this model can better describe the dynamic process of rainfall infiltration.
作者
高岩
胡晓蕾
刘然
GAO Yan;HU Xiao-lei;LIU Ran(Beijing Key Laboratory of Heating and Gas Supply Ventilation and Air Conditioning Engineering,Beijing University of Architecture,100044,Beijing,China;Beijing Advanced Design Center for Advanced Urban Design,100044,Beijing,China;Tsinghua University Architectural Design and Research Institute Co.,Ltd.,100084,Beijing,China)
出处
《建筑技术》
2019年第1期4-7,共4页
Architecture Technology
基金
国家自然科学基金项目(51678024)
关键词
降雨入渗
含水量
仿真模拟
rainfall infiltration
water content
simulation
