黄土高原寒冷地区某学校海绵改造方案分析与应用

西北某市位于黄土高原沟壑区,水土流失严重,而海绵城市的建设可以解决水土流失、城市内涝、水环境污染、干旱缺水等方面的问题,因此以该市某学校地块的海绵城市改造为例,介绍了黄土高原寒冷地区学校海绵城市改造工程的设计思路和技术路线。通过系统化方案梳理,以年径流总量控制为主要目标、兼顾污染控制和雨水资源化利用,从源头控制、过程控制、末端治理、雨水回用和项目效益等多方面对学校海绵城市改造进行了分析,结合"渗、滞、蓄、净、用、排"等技术措施,实现了年径流总量控制率为81%的目标,可为低影响开发技术在我国西北黄土高原、寒冷湿陷性黄土地区学校海绵城市改造中的应用提供借鉴和参考。

Analysis and Application of a School Sponge Reconstruction Scheme in Cold Area of Loess Plateau

A city in the northwest is located in the gully region of the Loess Plateau,where soil erosion is severe,and the construction of sponge city can solve problems such as water and soil loss,urban flooding,water environmental pollution,drought and water shortage.Taking the sponge city renovation of the school as an example,the design ideas and technical routes of the school sponge city reconstruction project in the cold region of the Loess Plateau were introduced.Through the systematic plan,taking the volume capture ratio of annual rainfall as the main goal,taking pollution control and rainwater resource utilization into account,this paper analyzed the transformation of school sponge city from the aspects of source control,process control,end treatment,rainwater reuse and project benefit.Combining technical measures such as "infiltration","retention","storage","purification","use"and "drainage",it has achieved the goal of 81% volume capture ratio of annual rainfall,which could provide reference for the use of low impact development technology to build school sponge city in the Loess Plateau and cold collapsible loess area in northwest China.