海绵城市雨洪控制中雨水径流水质变化规律分析

Sponge Urban Flood Control in the Rain the Rain Runoff Water Quality Variation Analysis

在充分利用水资源的理念下,对海绵城市某公司不同取样点的雨水水质进行检测。介绍了研究区域的详细情况,给出雨水采集方法、实验方法和水质指标检测方法。选择研究区域4个不同下垫面的屋面和路面作为雨水取样点,分析了雨水径流水质随降水时间的变化规律、雨水径流水质随降水强度的变化规律和不同下垫面影响下雨水径流水质变化规律。结果表明,降雨初期雨水污染程度较高,雨洪控制中衡量雨水径流水质指标含量相对较高;随着降雨时间的增加,水质逐渐好转并最终趋于稳定;短时暴雨和强度消耗时长降雨相比,径流污染负荷明显更高;舍弃前10 min的初期径流雨水后,水质明显更好,说明海绵城市雨水利用潜力很高,可作为第二水源。

Under make full use of the concept of water resources, a company of sponge city rain water quality testing of different sampling point, the details of the study area was introduced, rainwater harvesting method. Ex-periment method is given and the index of water quality detection method, choose the study area under four different on the surface of the mat roofing and pavement as a rainwater sampling point, analyzed the rain runoff water quality changing with the rainfall time, the rain runoff water quality changing with the rainfall intensity and the rain runoff water quality under the influence of different underlying surface change rule. The results show that the early rain rain pollution degree is higher, the rain flood control measure of rainwater runoff water quality index in the relatively high, with the increase of rainfall time, water quality improves gradually and eventually stabilized. Short duration rainfall intensity of heavy rain and consumption compared to the runoff pollution load significantly higher. Give up in the first 10 min after the rain, the early stages of the runoff water quality significantly better, illustrate the sponge city rainwater utilization potential is very high, can be used as the second water source.