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为充分利用城市地区次降雨资源,以西安理工大学办公楼沥青楼顶面(单一下垫面)采集到的8个微集雨桶水为例,发现微集雨桶水中浊度随时间呈下降趋势且基本上符合幂函数关系,前60d内化学需氧量(COD)浓度与时间的关系为一元二次函数关系;构建了微集雨桶水中浊度与次降雨量、初始浊度及储存时间的关系式及微集雨桶水中COD浓度与次降雨量、初始COD含量及储存时间的关系式,根据次降雨量、浊度或COD初始值就可得到不同储存时间段内微集雨桶水中的浊度或COD浓度。
In order to make full use of sub-rainfall resources in urban areas, taking eight micro-rainwater collected from the top of asphalt pavement of Xi’an University of Technology (single underlying surface) as an example, it was found that the turbidity of micro-rainwater bucket decreased with time Trend and basically in line with the power function, the relationship between chemical oxygen demand (COD) concentration and time in the first 60 days is a one-way quadratic function relationship; the turbidity and secondary rainfall, turbidity and storage Time and the relationship between the concentration of COD in micro-rainwater tank and secondary rainfall, initial COD content and storage time. According to the initial values of secondary rainfall, turbidity or COD, the micro-rain bucket Turbidity or COD concentration in water.