Evaluation of the vulnerability of rock weathering based on monitoring using photogrammetry
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Author(s)
Kim, DH
Gratchev, I
Oh, E
Balasubramaniam, AS
Year published
2016
Metadata
Show full item recordAbstract
This article describes a methodology to identify a relationship between spatial topographic changes and the brightness of the 3D images for the assessment of the vulnerability of rock slopes to weathering. In this study, photogrammetry surveys were carried out at a rock slope over a two year interval. The strength properties of the rock material were also investigated under laboratory conditions. The obtained 3D images were employed to the identity of topographic changes and also for image analysis using the intensity of their greyscale images. By comparing the annual photogrammetric 3D images, the data of roughness heights ...
View more >This article describes a methodology to identify a relationship between spatial topographic changes and the brightness of the 3D images for the assessment of the vulnerability of rock slopes to weathering. In this study, photogrammetry surveys were carried out at a rock slope over a two year interval. The strength properties of the rock material were also investigated under laboratory conditions. The obtained 3D images were employed to the identity of topographic changes and also for image analysis using the intensity of their greyscale images. By comparing the annual photogrammetric 3D images, the data of roughness heights were processed with relative brightness integers obtained from time considered greyscale images using a MATLAB image analysis tool. The results show that the loss of roughness height of the exposed surfaces appeared to be strongly related to the changes of integers of the greyscale images. This study suggests a methodology with regard to the sensitivity of weathering based on annual photogrammetry surveys.
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View more >This article describes a methodology to identify a relationship between spatial topographic changes and the brightness of the 3D images for the assessment of the vulnerability of rock slopes to weathering. In this study, photogrammetry surveys were carried out at a rock slope over a two year interval. The strength properties of the rock material were also investigated under laboratory conditions. The obtained 3D images were employed to the identity of topographic changes and also for image analysis using the intensity of their greyscale images. By comparing the annual photogrammetric 3D images, the data of roughness heights were processed with relative brightness integers obtained from time considered greyscale images using a MATLAB image analysis tool. The results show that the loss of roughness height of the exposed surfaces appeared to be strongly related to the changes of integers of the greyscale images. This study suggests a methodology with regard to the sensitivity of weathering based on annual photogrammetry surveys.
View less >
Conference Title
Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
Volume
2
Copyright Statement
© 2016 Australian Geomechanics Society. The attached file is reproduced here in accordance with their permission Please refer to the conference's website for access to the definitive, published version.
Subject
Physical geography and environmental geoscience