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Field monitoring of suction in the vicinity of an urban tree: exploring termite infestation and the shading effects of tree canopy
Wan-Huan Zhou1; Shu-Yu He2; Ankit Garg3; Zhen-Yu Yin4
2020-05
Source PublicationActa Geotechnica
ISSN1861-1125
Volume15Issue:5Pages:1341-1361
Abstract

The objective of this short communication is to explore spatial distribution of soil suction in the vicinity of an urban tree considering effects of termite infestation and also radiant energy interception by canopy. A site in an urban landscape containing a mix of species cover (grass cover in the vicinity of trees) was selected for monitoring. A field monitoring program was designed to monitor soil (soil suction, moisture), vegetation parameters (tree height, grass leaf area), and meteorological parameters during drying/wetting cycles. As expected, before termite infestation, suction magnitude and rate of change were highest near the tree stem and at shallower depths, reflecting the dominance of transpiration over evaporation. However, after termite infestation, soil suction diminished significantly near the tree stem and increased farther from the tree stem, a phenomenon accompanied by loss of canopy area, as captured by a color analysis technique (i.e., an image processing method). These findings reflected a reduction in stomatal conductance, itself an indicator of transpiration loss through the stomata—likely because reduced canopy shading effects caused increased evaporation. Soil suction at deeper depths seemed not to be significantly affected, generally due to canopy and termite infestation. In summary, the study sheds new light on issues of tree maintenance by showing how termite infestation can significantly affect the performance of green infrastructure.

KeywordSoil Suction Stomatal Conductance Termite Infestation Tree Canopy Urban Landscape
DOI10.1007/s11440-019-00810-0
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Geological
WOS IDWOS:000526622900020
PublisherSPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
Scopus ID2-s2.0-85065707259
Fulltext Access
FWCI0.7184547
Citation statistics
Document TypeJournal article
CollectionFaculty of Science and Technology
THE STATE KEY LABORATORY OF INTERNET OF THINGS FOR SMART CITY (UNIVERSITY OF MACAU)
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorAnkit Garg
Affiliation1.State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering,University of Macau,Macau S.A.R.,China
2.Department of Civil and Environmental Engineering,Faculty of Science and Technology,University of Macau,Macao
3.Department of Civil and Environmental Engineering,Shantou University,Shantou,515063,China
4.Department of Civil and Environmental Engineering,Hong Kong Polytechnic University,Hung Hom, Kowloon,Hong Kong
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Wan-Huan Zhou,Shu-Yu He,Ankit Garg,et al. Field monitoring of suction in the vicinity of an urban tree: exploring termite infestation and the shading effects of tree canopy[J]. Acta Geotechnica,2020,15(5):1341-1361.
APA Wan-Huan Zhou,Shu-Yu He,Ankit Garg,&Zhen-Yu Yin.(2020).Field monitoring of suction in the vicinity of an urban tree: exploring termite infestation and the shading effects of tree canopy.Acta Geotechnica,15(5),1341-1361.
MLA Wan-Huan Zhou,et al."Field monitoring of suction in the vicinity of an urban tree: exploring termite infestation and the shading effects of tree canopy".Acta Geotechnica 15.5(2020):1341-1361.
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