“海绵城市”建设中生态沟渠实验分析

The experimental analysis of ecological ditches in construction of “Sponge City”

基于生态沟渠对径流雨水的净化作用,文中通过对沣西新城生态沟渠出水的氨氮、总氮、正磷酸盐和总磷测定,研究不同水力负荷、污染物浓度、生态沟渠基质构成和植被条件等因素对污染物去除效果的影响.结果表明,生态沟渠对磷的去除效果显著高于氮,其对污染物中磷的最高去除率可达到95.4%,氮的去除率最高可达到48.4%.这对我国海绵城市的建设及生态沟渠的工程应用具有积极的借鉴作用.

Based on the purification of ecological ditches and providing reference data for engineering application of ecological ditches, through the determination of ammonia nitrogen, total nitrogen, orthophosphate and total phosphorus in Fengxi New Town, the experiment was conducted about the influence of hydraulic load, pollution concentration, the substrate constitution of ecological ditches and vegetation condition on the contaminants removal performance. The results show that the effect of ecological ditches on phosphorus removal is significantly higher than that on nitrogen, with the highest phosphorus removal rate 95.4%, and nitrogen removal rate 48.4%.This is a positive reference to the ＂Sponge City＂ in China.