The influence of a green roof drainage layer on retention capacity and leakage quality

被引:16
|
作者
Baryla, Anna [1 ]
Karczmarczyk, Agnieszka [1 ]
Brandyk, Andrzej [2 ]
Bus, Agnieszka [1 ]
机构
[1] Warsaw Univ Life Sci SGGW, Fac Civil & Environm Engn, Dept Environm Improvement, Nowoursynowska 166, PL-02787 Warsaw, Poland
[2] Warsaw Univ Life Sci SGGW, Fac Civil & Environm Engn, Water Ctr Lab, Nowoursynowska 166, PL-02787 Warsaw, Poland
关键词
drainage layer; green roof; runoff retention; soil substrate; water quality; RUNOFF; PERFORMANCE; SUBSTRATE; POLLUTION; QUANTITY; PLANTS; MODEL;
D O I
10.2166/wst.2018.283
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The aim of the research was to determine the influence of the substrate and different drainage materials on retention capacity and runoff water quality from three green roof containers. Phosphates were chosen as the water quality indicator based on their potential adverse impact on water quality in urban rainwater collectors. The field experiment was conducted at the Warsaw University of Life Sciences Water Center meteorological station in years 2013-2015. In terms of precipitation, the monitoring period covered a wet (+147.1 mm), average (+42.7 mm) and dry (- 66.3 mm) year. Leakage from the containers was recorded when the substrate moisture exceeded 20% and precipitation exceeded 3.5 mm/d for washed gravel, or 5.0 mm/d for a polypropylene mat and expanded clay. Phosphates were observed in leachates from all containers, with higher values observed in the second year of monitoring. As the result of this study, it can be concluded that the polypropylene mat and aggregates create different conditions for the formation of the leachate, in both volumes and its chemistry. The drainage layer made from a polypropylene mat is the most effective in terms of rainwater retention capacity and the resulting leachate quality.
引用
收藏
页码:2886 / 2895
页数:10
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