全堵塞周期内透水砖路面的下渗-产流模型研究

Study on infiltration-runoff model of permeable brick pavement during full clogging cycle

采用下渗曲线扣损法对不同堵塞程度透水砖路面的场次降雨产流进行模拟,研究适用于全堵塞周期内透水砖的下渗-产流模型。结果表明:4种下渗-产流模型对不同堵塞程度透水砖产流数据拟合效果由好到差依次为Horton模型、Kostiakov模型、Green-Ampt模型、Philip模型,Horton模型可以更好地描述全堵塞周期内透水砖路面的场次降雨产流过程;透水砖堵塞程度和降雨重现期均会影响4种模型对下渗产流过程的模拟效果,Horton模型和Kostiakov模型的模拟效果随透水砖堵塞程度增加而提高,Green-Ampt模型和Philip模型的模拟效果则随堵塞程度增加而降低;4种模型对全堵塞周期内透水砖产流过程的模拟效果均随降雨重现期增大呈现先降低后升高的趋势;基于模拟效果,引入堵塞程度和降雨强度修正Horton模型,建立了适用于不同堵塞程度透水砖路面的下渗产流模型。

The infiltration curve deduction method was used to simulate the rainfall runoff of permeable brick pavement with different clogging degrees,and the infiltration-runoff model suitable for permeable bricks during the full blockage cycle were studied.The results show that the fitting effects of the four infiltration-runoff models on the runoff data of permeable bricks with different clogging degrees,from good to bad,are Horton model,Kostiakov model,Green Ampt model,and Philip model,respectively.The Horton model can better describe the rainfall runoff process of permeable brick pavement during the full clogging cycle.The clogging degree of permeable bricks and the rainfall return period will both affect the simulation effect of the four models on the infiltration-runoff process.The simulation effect of Horton model and Kostiakov model increases with the increase of clogging degree of permeable bricks,while the simulation effect of Green Ampt model and Philip model decreases with the increase of clogging degree.As the rainfall return period increases,the simulation effects of the four models on the flow process of permeable bricks during the full clogging cycle show a trend of first decreasing and then increasing.Based on the simulation results,the Horton model was modified by introducing the clogging degree and rainfall intensity,and an infiltration-runoff model suitable for permeable brick pavement with different degrees of blockage was established.