降雨特征对半透水道路径流系数的影响EI北大核心CSCD

通过单车道半透水道路物理模型试验,采用人工模拟降雨的方法,系统研究了降雨强度、降雨历时、雨峰系数和雨型对半透水道路径流系数的影响。结果表明:径流系数随着重现期的增大而增大,当重现期从0.5 a增加到20 a时,径流系数从0.093增加到0.377;径流系数随着降雨历时的增大而减小,随着雨峰系数的增大而增大;当重现期和降雨历时保持不变时,均匀雨型条件下的径流系数略大于芝加哥雨型条件下的径流系数;重现期对半透水道路径流系数的影响最大,雨峰系数和雨型对其影响较小。

Influences of rainfall characteristics on runoff coefficient of semi-permeable roads

The effects of rainfall intensity, rainfall duration, rainfall peak coefficient, and rainfall pattern on the runoff coefficient of semi-permeable roads were systematically investigated via physical model experiments with simulated rainfall events. The results show that runoff coefficient increases with rainfall return period, with the value increasing from 0.093 to 0.377 when the return period is varied from 0.5a to 20a; it also decreases with the increase of rainfall duration and increases with the increase of rainfall peak coefficient; the runoff coefficient under the condition of uniform rainfall pattern is slightly larger than that of Chicago rainfall pattern when rainfall return period and rainfall duration are kept in the same experimental condition. Rainfall return period has the most important influence on the runoff coefficient of semi-permeable roads, followed by rainfall peak coefficient and rainfall pattern.