摘要
透水铺装材料属大孔隙多孔介质,根据水分受力状态划分,其中雨水入渗过程可分为吸湿过程和传递过程两部分,分别以基质势和重力势为主要驱动力;透水铺装地面降雨产流包括铺装层和基层土壤两部分产流过程的总和,在基层土壤表面以超渗产流模式形成垫层内积水,在透水铺装层表面以蓄满产流形式形成地表积水;模型各参数中,铺装层和土壤层的初始含水率、田间持水量、饱和含水率等参数对模型计算结果影响较大,应根据材料测试结果慎重选择。
Permeable pavements are porous medium which are consisted of macro pores.The process of rainwater infiltrating in permeable pavement involves tow steps which are moisture absorption procedure and moisture conduction procedure.These processes are mainly droved by matric and gravitational potential.The runoff on permeable underlying surface should integrate the amount produced both from pavement and soil.The water generated at the layer of soil by a mechanism of infiltration excess,while the water generated at the surface of permeable pavement by a mechanism of saturation excess.Among the parameters in model,the values of initial moisture,field capacity,saturated moisture of pavement and soil have great impacts on the calculation result,which should be selected carefully through experiments.
出处
《给水排水》
CSCD
北大核心
2010年第5期154-159,共6页
Water & Wastewater Engineering
基金
国家科技支撑计划课题(2007BAC22B01)
水利部公益性行业科研专项经费项目(200801108)
关键词
透水铺装
雨水利用
模型
超渗产流
蓄满产流
Permeable pavement
Rainwater utilization
Model
Mechanism of infiltration excess
Mechanism of saturation excess
