海绵城市雨洪入渗渠工程设计与管理研究

Storm-water Infiltration Trenches Design and Management in Sponge Urban

当前随着城市化的发展,市区不透水面积增加,地下水补给减少,城市洪涝灾害不断发生。入渗渠工程是实现市区降雨径流优化配置,改善生态环境,减少城市化建设带来的负面影响的重要工程措施。首先构建了海绵城市入渗渠设计的理论模型,提出了入渗渠多功能集成形式和数值计算方法。其次选择国家海绵城市建设试点河南省鹤壁市为典型,分别对梯形入渗渠断面和矩形断面的设计以及有关参数进行了计算。实践证明,研究成果对于城市雨洪入渗渠整体设计、入渗强度计算方法、入渗渠地下水人工补给量计算、入渗渠排水时间计算、雨洪资源管理、最佳管理措施方案设计等具有十分重要的参考价值。

With the development of urbanization,the permeable soil surface area through which recharge by infiltration can occur is decreasing. This results in much less ground-water recharge and greatly increased surface run-off. Infiltration devices,which redirect run-off waters from the surface to the sub-surface environments,are commonly adopted to mitigate the negative hydrologic effects associated with urbanization. Therefore,the theoretical model of infiltration trenches is set up,and the forms of multi-functional integration and numerical computation methods for trenches are put forward. Secondly,taking Hebi City situated in Henan Province and national sponge urban construction experiment plot as an example,the design of trapezoidal and rectangular section of infiltration trenches,and the relevant parameters are considered. It is proved by practice that the present findings play an important role in the development of infiltration rate method,recharge for ground water calculation,drainage time determination,storm water management and solution of the best management practices.