【摘要】 提高填料透水性能以平衡其水文调节和污染物去除性能是红壤区生物滞留池构建的关键。研究设计红壤填料中掺入不同比例的河沙以改变其透水性,比较分析其在不同的重现期降雨强度下对生物滞留池的水文调节和污染物去除效果。结果表明:同一降雨强度重现期下,地表径流处理率随着掺沙比例的增加而增加,峰值削减率随沙土配合比的增加变化不明显,峰值延迟时间随掺沙比例增加而减少;硝氮的去除率随着掺沙比例的增加而增加,但对COD的去除率则随着掺沙量的增加而下降,对氨氮和总磷的去除率影响不大;综合考虑生物滞留池的水文调节和污染物去除效果,20%红壤土与80%河沙混合是红壤区生物滞留池填料较为科学的沙土配比。更多还原

【Abstract】 Improving the permeability of fillers to balance their hydrological regulation and pollution removal performance is the key for the bioretention pond in red soil region. In order to change the permeability of red soil,different proportions of river sand were mixed into red soil,and their effects on hydrological regulation and pollution removal of bioretention pond system under different rainfall intensity at different recurrence periods were compared and analyzed. The results show that the surface runoff treatment rate increases with the increase of sediment mixing ratio,the peak reduction rate does not change significantly with the increase of sand mixing ratio,and the peak delay time decreases with the increase of sediment mixing ratio. The removal rate of nitrate increases with the increase of sediment content,but the removal rate of COD decreases with the increase of sediment content,and little effect on the removal rate of ammonia nitrogen and total phosphorus. Considering the effects of hydrological regulation and pollution removal,20% red loam and 80% river sand are the scientific proportion of fillers for bioretention facilities in red soil area.更多还原