Infuence of biochar amendment on stormwater management in green roofs: experiment with numerical investigation

Gan, Lin; Garg, Ankit; Wang, Hao; Mei, Guoxiong; Liu, Jiaqin

doi:10.1007/s11600-021-00685-4

Artykuł - szczegóły

Tytuł artykułu

Infuence of biochar amendment on stormwater management in green roofs: experiment with numerical investigation

Autorzy

Gan Lin , Garg Ankit , Wang Hao , Mei Guoxiong , Liu Jiaqin

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-021-00685-4

Warianty tytułu

Języki publikacji

Abstrakty

Green roof is known to minimize urban waterlogging owing to its water retention capacity due to the presence of substrate soil layer. Biochar, which is a carbon-negative material, appears to be an essential soil amendment in green roof due to its water-holding capacity and stability. Recently, incentives are provided in developed countries to enhance commercial pro duction of biochar for usage in green infrastructure, with an aim to meet carbon reduction goals of 2030. Further, biochar has a longer half-life (over 100 years), compared to other materials that are easier to degrade. In this study, the influence of different biochar contents on hydrological performance of green roof is evaluated using a combination of experiment and numerical simulation. Four soil columns with different biochar contents (0, 5, 10 and 15%) were subjected to artificial rainfall. Hydraulic parameters were obtained using inverse solution from the collected rainfall data. Numerical simulations were used to explore the impact of different biochar contents on green roof rainwater management performance during real rainfall process. Biochar is found to enhance saturated water content and, however, tends to reduce saturated hydraulic conductivity. The green roof with 10% BAS (10% biochar content) has better ability of comprehensive rainwater management, with the highest peak outflow reduction and the longest rainwater outflow delay. Green roof with 5% BAS has highest runoff reduction and longest peak outflow delay. These results provide a suitable selection of biochar content for urban areas with different rainwater management requirements.

Słowa kluczowe

biochar green roof hydrological process numerical simulation rainwater management

biowęgiel dach zielony proces hydrologiczny symulacja numeryczna gospodarowanie wodami opadowymi

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2021

Tom

Vol. 69, no. 6

Strony

2417--2426

Opis fizyczny

Bibliogr. 50 poz.

Twórcy

autor

Gan Lin

1910391017@st.gxu.edu.cn

College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi, China
Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi, China
Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety of Guangxi, Nanning, Guangxi, China

autor

Garg Ankit

ankit@stu.edu.cn

Department of Civil and Environmental Engineering, Shantou University, Shantou, China

autor

Wang Hao

1810301055@st.gxu.edu.cn

Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi, China
College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi, China
Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety of Guangxi, Nanning, Guangxi, China

autor

Mei Guoxiong

meiguox@163.com

Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi, China
Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety of Guangxi, Nanning, Guangxi, China

autor

Liu Jiaqin

1361656074@qq.com

College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi, China
Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi, China
Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety of Guangxi, Nanning, Guangxi, China

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Bibliografia

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