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Article: Cover systems with synthetic water‐repellent soils

TitleCover systems with synthetic water‐repellent soils
Authors
Issue Date2021
PublisherJohn Wiley & Sons Ltd, published in association with Soil Science Society of America. The Journal's web site is located at https://acsess.onlinelibrary.wiley.com/journal/15391663
Citation
Vadose Zone Journal, 2021, v. 20 n. 1, p. article no. e20093 How to Cite?
AbstractA cover system is a crucial component of engineered landfills, to minimize water percolation into the underlying waste. Capillary barriers are an alternative cover system, which has been widely used in the arid and semiarid regions as no cohesive, low-permeability materials are used. However, the performance of capillary barriers in tropical climate has been unsatisfactory (breakthrough observed). In recent years, synthetic water-repellent granular materials have drawn increasing attention due to their distinctive hydraulic behavior (inhibited water infiltration and high water entry pressure), suggesting they may also be used to improve the performance of cover systems. In this study, flume tests were conducted with inclined model slopes under artificial rainfall. By monitoring the surface runoff, lateral diversion, and basal percolation and conducting water balance analysis, the performance of monolithic cover, conventional capillary barrier, and water-repellent cover systems were evaluated. The study revealed that (a) the barrier effect and diversion capacity were significantly strengthened by induced water repellency, providing a promising solution to extend the application of capillary barrier covers; and (b) cover systems can be formed using one raw material to decrease the construction cost, by using synthetic water-repellent soil as the underlying layer.
Persistent Identifierhttp://hdl.handle.net/10722/295779
ISSN
2023 Impact Factor: 2.5
2023 SCImago Journal Rankings: 0.790
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZHENG, S-
dc.contributor.authorXING, X-
dc.contributor.authorNunes Lourenco, SD-
dc.contributor.authorCleall, PJ-
dc.date.accessioned2021-02-08T08:13:53Z-
dc.date.available2021-02-08T08:13:53Z-
dc.date.issued2021-
dc.identifier.citationVadose Zone Journal, 2021, v. 20 n. 1, p. article no. e20093-
dc.identifier.issn1539-1663-
dc.identifier.urihttp://hdl.handle.net/10722/295779-
dc.description.abstractA cover system is a crucial component of engineered landfills, to minimize water percolation into the underlying waste. Capillary barriers are an alternative cover system, which has been widely used in the arid and semiarid regions as no cohesive, low-permeability materials are used. However, the performance of capillary barriers in tropical climate has been unsatisfactory (breakthrough observed). In recent years, synthetic water-repellent granular materials have drawn increasing attention due to their distinctive hydraulic behavior (inhibited water infiltration and high water entry pressure), suggesting they may also be used to improve the performance of cover systems. In this study, flume tests were conducted with inclined model slopes under artificial rainfall. By monitoring the surface runoff, lateral diversion, and basal percolation and conducting water balance analysis, the performance of monolithic cover, conventional capillary barrier, and water-repellent cover systems were evaluated. The study revealed that (a) the barrier effect and diversion capacity were significantly strengthened by induced water repellency, providing a promising solution to extend the application of capillary barrier covers; and (b) cover systems can be formed using one raw material to decrease the construction cost, by using synthetic water-repellent soil as the underlying layer.-
dc.languageeng-
dc.publisherJohn Wiley & Sons Ltd, published in association with Soil Science Society of America. The Journal's web site is located at https://acsess.onlinelibrary.wiley.com/journal/15391663-
dc.relation.ispartofVadose Zone Journal-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleCover systems with synthetic water‐repellent soils-
dc.typeArticle-
dc.identifier.emailNunes Lourenco, SD: lourenco@hku.hk-
dc.identifier.authorityNunes Lourenco, SD=rp01872-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1002/vzj2.20093-
dc.identifier.scopuseid_2-s2.0-85099070712-
dc.identifier.hkuros321075-
dc.identifier.volume20-
dc.identifier.issue1-
dc.identifier.spagearticle no. e20093-
dc.identifier.epagearticle no. e20093-
dc.identifier.isiWOS:000620855500003-
dc.publisher.placeUnited States-

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