城市区域绿色屋顶普及对水量水质的影响

发布时间：2018-05-18 23:03

本文选题：绿色屋顶 + 水量水质　；参考：《应用生态学报》2014年07期

【摘要】：绿色屋顶是城市降雨径流管理的主要措施之一,为了解绿色屋顶普及对城市流域降雨径流量和径流水质的影响,本文以重庆大学虎溪流域为研究载体,评估了绿色屋顶规模化应用与流域降雨产流和径流水质的响应关系.结果表明:在城市流域进行屋面绿化有助于消减降雨径流以及产污负荷,且屋顶绿化规模和空间分布情景影响降雨径流水质.在屋顶占城市区域总面积的比例为25%、降雨持续时间15 min、降雨强度14.8 mm·h-1的条件下,当区域内屋顶全部绿化时,峰值降雨径流降低5.3%,降雨径流总量降低31%;总悬浮物(TSS)、总磷(TP)、总氮(TN)的污染负荷分别降低40.0%、31.6%、29.8%,峰值浓度分别降低21.0%、16.0%、-12.2%,平均浓度分别降低13.1%、0.9%、-1.7%;随屋顶绿化率的增加,TSS、TP浓度消减率有所提高,而TN浓度消减率则呈降低趋势,靠近流域总出水口进行屋面绿化,更有利于径流水质的改善.
[Abstract]:Green roof is one of the main measures for urban rainfall runoff management. In order to understand the influence of green roof popularization on rainfall runoff and runoff water quality of urban watershed, this paper takes the Huxi Basin of Chongqing University as the research carrier. The response of large-scale application of green roof to rainfall runoff and runoff quality was evaluated. The results show that roof greening in urban watersheds is helpful to reduce rainfall runoff and sewage production load, and the scale and spatial distribution of roof greening affect rainfall runoff water quality. Under the condition that the ratio of roof to total area of urban area is 25, the duration of rainfall is 15 minutes, and the intensity of rainfall is 14.8 mm h-1, when the roof of the area is completely green, The pollution load of total suspended substance (TSS), total phosphorus (TP) and total nitrogen (TNN) were reduced by 40.0 and 31.6%, respectively, and the peak concentrations were decreased by 21.0 and 16.0- 12.2and the average concentrations were decreased by 13.10.90.9- 1.7, respectively. With the increase of the green rate of roof, the reduction rate of TSSTP concentration increased. The TN concentration reduction rate is decreasing, and the roof greening near the total outlet of river basin is more beneficial to the improvement of runoff water quality.
【作者单位】：重庆市环境材料与修复技术重点实验室;重庆大学三峡库区生态环境教育部重点实验室;
【基金】：重庆市教委科技项目(KJ1401120,KJ121214) 重庆文理学院基金项目(Z2013CH03,2012PYXM05)资助
【分类号】：TU991.21

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