雨洪滞留措施在梅雨期面临的挑战

Challenges Faced by Sponge City Rainwater Detention Measures during the Meiyu Period

因我国幅员辽阔,不同气候条件相差很大,不同区域的海绵城市会面临一些特殊的问题,海绵城市建设需区别采取措施。本文以江淮地区的梅雨季节为研究对象,针对梅雨集中期进行典型梅雨的推求,利用皮尔逊Ⅲ型频率曲线——配线法设计暴雨的推求。地下水位变化对降雨入渗的响应明显滞后,特别是地下水位埋深较大时,滞后现象更为明显。此时在海绵城市建设标准实施过程中,面对不同设计条件下是否应提高海绵城市雨洪滞留措施的标准,若提高相应海绵城市的建设标准,应采取何种方法进行改变,本文对上述问题进行了分析。

Sponge city construction measures due to our country’s vast territory and different climatic conditions vary greatly.Sponge cities in different regions will face some special problems and need to be treated differently.This paper takes the Meiyu season in the Jianghuai area as the research object,and calculates the typical Meiyu during the concentrated period of the Meiyu,and uses the Pearson type III frequency curve-wiring method to calculate the design storm.The response of groundwater level changes to rainfall infiltration is obviously lagging,especially when the groundwater level is deeply buried,the lagging phenomenon is more obvious.At this time,during the implementation of the sponge city construction standards,whether the sponge city rainwater retention measures should be raised under different design conditions.If the construction standards of the corresponding sponge cities are raised,what methods should be adopted to make changes?