阶梯型雨水花园在山地城市海绵设计中的应用

Application of Stepped-Rain Gardens in Sponge Design of Mountainous City

山地城市空间紧凑、坡度陡、土壤渗透性差,普通雨水花园难以适应其工程需求。该文结合山地城市的水文特征,提出了阶梯型雨水花园的概念,设计出了台阶型、错置型、重叠型三类典型阶梯型雨水花园应用形式,并探讨了三种阶梯型雨水花园的适用性。同时,针对常规径流计算方法的缺陷,提出了适用于阶梯型雨水花园的径流计算新方法。该文的研究为山地城市海绵设计提供了一定的理论支撑和应用形式。

Since the mountainous city has compact spaces, steep slope surfaces and poor soil permeability, ordinary rain gardens show a series of limitations in terms of project requirements. Combined with the hydrological features of mountainous city, this paper proposed the concept of "stepped-rain garden", designs three typical application forms of stepped-rain gardens, namely sladdered-rain gardens, dislocated-rain gardens and overlapped-rain gardens, with the applicability of the three stepped rain gardens discussed. Meanwhile, in terms of the scarcity of conventional runoff calculation method, a new runoff calculation method for stepped-rain gardens was proposed. This study offers the sponge design of mountainous city a series of theoretical support and application forms.