CLC number: TU43
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2018-12-06
Cited: 0
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Citations: Bibtex RefMan EndNote GB/T7714
Charles W.W. Ng, Bang-wen Lu, Jun-jun Ni, Yun-min Chen, Rui Chen, Hao-wen Guo. Effects of vegetation type on water infiltration in a three-layer cover system using recycled concrete[J]. Journal of Zhejiang University Science A, 2019, 20(1): 1-9.
@article{title="Effects of vegetation type on water infiltration in a three-layer cover system using recycled concrete",
author="Charles W.W. Ng, Bang-wen Lu, Jun-jun Ni, Yun-min Chen, Rui Chen, Hao-wen Guo",
journal="Journal of Zhejiang University Science A",
volume="20",
number="1",
pages="1-9",
year="2019",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1800373"
}
%0 Journal Article
%T Effects of vegetation type on water infiltration in a three-layer cover system using recycled concrete
%A Charles W.W. Ng
%A Bang-wen Lu
%A Jun-jun Ni
%A Yun-min Chen
%A Rui Chen
%A Hao-wen Guo
%J Journal of Zhejiang University SCIENCE A
%V 20
%N 1
%P 1-9
%@ 1673-565X
%D 2019
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1800373
TY - JOUR
T1 - Effects of vegetation type on water infiltration in a three-layer cover system using recycled concrete
A1 - Charles W.W. Ng
A1 - Bang-wen Lu
A1 - Jun-jun Ni
A1 - Yun-min Chen
A1 - Rui Chen
A1 - Hao-wen Guo
J0 - Journal of Zhejiang University Science A
VL - 20
IS - 1
SP - 1
EP - 9
%@ 1673-565X
Y1 - 2019
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1800373
Abstract: To promote environmental sustainability, recycled construction concrete is suggested for civil infrastructure works. The aim of this study was to investigate the effects of vegetation type on water infiltration under extreme rainfall conditions in a proposed three-layer landfill cover system containing recycled concrete. Three soil columns, namely bare, covered with shrub (Schefflera arboricola), and covered with grass (Cynodon dactylon), were subjected to ponding tests. Each column was compacted with a bottom layer of silty soil, an intermediate layer of coarse recycled concrete aggregate, and an upper layer of fine recycled concrete aggregate. Water breakthrough occurred only in the bare cover system after 48 h of ponding, equivalent to a rainfall return period of greater than 1000 years in Hong Kong. Under the vegetated covers, suction maintained in the bottom silty soil layer was higher than under the bare cover by 49–52 kPa and hence no percolation was observed after 48 h of ponding. Comparing the two vegetated cover systems, suction maintained under the shrub cover was 2–12 kPa higher (2%–8% lower volumetric water content) than that under the grassed cover in the layers of recycled concrete. This implies that shrub cover can be more effective than grass cover in reducing water infiltration in humid climates.
This paper presents a novel study on the hydraulic behavior of a three-lift soil cover with recycled material. The results have practical values for the construction of landfill covers in humid area.
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