EFFECT OF SUBSTRATE COMPOSITION OF EXTENSIVE GREEN ROOF ON WATER QUALITY OF RAINFALL OUTFLOW

LUO Ting; XU Wen-nian; CHENG Hu; YAN Yu-jie; ZHANG Yong-bo; MEI Shu-yu; XIA Dong

doi:10.13205/j.hjgc.202004008

Volume 38 Issue 4

Apr. 2020

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LUO Ting, XU Wen-nian, CHENG Hu, YAN Yu-jie, ZHANG Yong-bo, MEI Shu-yu, XIA Dong. EFFECT OF SUBSTRATE COMPOSITION OF EXTENSIVE GREEN ROOF ON WATER QUALITY OF RAINFALL OUTFLOW[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(4): 39-45. doi: 10.13205/j.hjgc.202004008

Citation:

LUO Ting, XU Wen-nian, CHENG Hu, YAN Yu-jie, ZHANG Yong-bo, MEI Shu-yu, XIA Dong. EFFECT OF SUBSTRATE COMPOSITION OF EXTENSIVE GREEN ROOF ON WATER QUALITY OF RAINFALL OUTFLOW[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(4): 39-45. doi: 10.13205/j.hjgc.202004008

Citation:

LUO Ting, XU Wen-nian, CHENG Hu, YAN Yu-jie, ZHANG Yong-bo, MEI Shu-yu, XIA Dong. EFFECT OF SUBSTRATE COMPOSITION OF EXTENSIVE GREEN ROOF ON WATER QUALITY OF RAINFALL OUTFLOW[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(4): 39-45. doi: 10.13205/j.hjgc.202004008

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EFFECT OF SUBSTRATE COMPOSITION OF EXTENSIVE GREEN ROOF ON WATER QUALITY OF RAINFALL OUTFLOW

doi: 10.13205/j.hjgc.202004008

LUO Ting^1,2,
XU Wen-nian^2,3,
CHENG Hu^1,2,
YAN Yu-jie^1,2,
ZHANG Yong-bo⁴,
MEI Shu-yu⁴,
XIA Dong^{1,2,3,4
,
,}

1. Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China;
2. Engineering Research Center of Eco-Environment in Three Gorges Reservoir, China Three Gorges University, Yichang 443002, China;
3. Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges, China Three Gorges University, Yichang 443002, China;
4. College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China

Received Date: 2019-04-29

Abstract

Abstract

In order to study the effect of substrate composition of extensive green roof on the leaching of N, P, COD and SS from rainwater, three green roof models with different substrate compositions were constructed according to rainfall intensity and water quality in central China, and the water quality monitoring of green roof was carried out under 9 simulated rainstorms. The results showed that the green roof facilities in this experiment could reduce TN, NH₄⁺-N, NO₃^--N and SS, but the leaching of TP and PO₄^3--P was obvious. The outflow of green roof was mainly particulate phosphorus and dissolved nitrogen; removal of SS from the effluent had significant effect on COD purification; the addition of biochar had obvious controlling effect on the outflow pollutants, which could effectively alleviate the problems of high concentration of pollutants in the initial stage of rainfall, and significantly increase the aboveground biomass of plants; the average concentration of N and COD in the effluent from green roof of 5 cm thick was lower than that of 10 cm thick, but the SS effluent was higher, and the plants could not maintain good growth in the later stage of rainfall. The extensive green roof facility had good pollution interception effect after stable operation, and high feasibility and broad application prospects.
- extensive green roof,
- matrix,
- outflow water quality,
- simulated rainfall,
- pollutant control

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References(39)

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