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Seasonal slope surface deformation measured with terrestrial laser scanning

Seasonal slope surface deformation measured with terrestrial laser scanning
Seasonal slope surface deformation measured with terrestrial laser scanning
In temperate European climates, soil water removal due to vegetation transpiration peaks in summer and soil rewetting from higher levels of precipitation occurs in winter. In clays of high plasticity, the seasonal cycles of drying and wetting cause the soil to experience a volumetric change, resulting in seasonal shrinking and swelling. For a clay slope exhibiting volume change, such behaviour can lead to excessive deformation and could contribute to strain-softening and progressive slope failure. This can in turn cause traffic disruption and loss of life if roads and railways are founded on or surrounded by such slopes. This paper discusses the driving forces of seasonal surface movement, in particular the role of vegetation, and presents the use of Terrestrial Laser Scanning (TLS) to measure the surface movement of a lightly vegetated London Clay slope near Newbury, UK. Two TLS scans were carried out in early and late summer respectively, representing relative wet and dry conditions of the slope. Continuous field measurements of soil water content in upper layers of the slope were obtained from TDR ThetaProbes already installed at the site. The water content data are used to support the results obtained from TLS by indicating the likely volumetric change in the soil due to loss of water.
Fan, L
74cd9294-00b3-488f-bf52-6eb7f99d4ef5
Smethurst, J.A.
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Sellaiya, A
c7c198ff-f8cb-466b-bd7c-3ef8b1edb916
Fan, L
74cd9294-00b3-488f-bf52-6eb7f99d4ef5
Smethurst, J.A.
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Sellaiya, A
c7c198ff-f8cb-466b-bd7c-3ef8b1edb916

Fan, L, Smethurst, J.A., Powrie, W. and Sellaiya, A (2014) Seasonal slope surface deformation measured with terrestrial laser scanning. Proceedings of the 35th International Symposium on Remote Sensing of Environment (ISRSE), Beijing, China. 22 - 26 Apr 2013. 6 pp . (doi:10.1088/1755-1315/17/1/012264).

Record type: Conference or Workshop Item (Paper)

Abstract

In temperate European climates, soil water removal due to vegetation transpiration peaks in summer and soil rewetting from higher levels of precipitation occurs in winter. In clays of high plasticity, the seasonal cycles of drying and wetting cause the soil to experience a volumetric change, resulting in seasonal shrinking and swelling. For a clay slope exhibiting volume change, such behaviour can lead to excessive deformation and could contribute to strain-softening and progressive slope failure. This can in turn cause traffic disruption and loss of life if roads and railways are founded on or surrounded by such slopes. This paper discusses the driving forces of seasonal surface movement, in particular the role of vegetation, and presents the use of Terrestrial Laser Scanning (TLS) to measure the surface movement of a lightly vegetated London Clay slope near Newbury, UK. Two TLS scans were carried out in early and late summer respectively, representing relative wet and dry conditions of the slope. Continuous field measurements of soil water content in upper layers of the slope were obtained from TDR ThetaProbes already installed at the site. The water content data are used to support the results obtained from TLS by indicating the likely volumetric change in the soil due to loss of water.

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More information

Accepted/In Press date: 1 January 2014
Published date: 2 January 2014
Venue - Dates: Proceedings of the 35th International Symposium on Remote Sensing of Environment (ISRSE), Beijing, China, 2013-04-22 - 2013-04-26
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 354367
URI: http://eprints.soton.ac.uk/id/eprint/354367
PURE UUID: 18c7c3a2-b29e-4d30-8b32-6334210eda94
ORCID for W. Powrie: ORCID iD orcid.org/0000-0002-2271-0826

Catalogue record

Date deposited: 29 Jul 2013 16:06
Last modified: 15 Mar 2024 02:48

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Contributors

Author: L Fan
Author: J.A. Smethurst
Author: W. Powrie ORCID iD
Author: A Sellaiya

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