On characterization of the imbrication of armored gravel surfaces
Publication in refereed journal

香港中文大學研究人員

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替代計量分析
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摘要Imbrication of static armor surfaces is investigated based on laser-scanned DEMs collected from both flume experiments and the field. Two approaches are employed to study the imbrication including inclination index and aspect and slope (AS) method. The inclination index is found to be a sensitive and valid method for indicating the existence of imbrication. Application of this method, however, requires high-resolution surfaces. A positive relationship is obtained between the inclination index and effective grain size, which can be used to deduce the historical armoring shear stress. The AS method based on the statistics of local gradients describes the imbrication in a more straightforward way. However, this method is based on the statistics of orientations of grids rather than individual grains. An improved AS method is proposed in this study based on orientations of grains with the help of automated grain segmentation method. The improved AS method makes this method more reasonable and increases the applicable range. (c) 2012 Elsevier B.V. All rights reserved.
著者Qin J, Zhong DY, Wang GQ, Ng SL
期刊名稱Geomorphology
出版年份2012
月份7
日期15
卷號159
出版社Elsevier
頁次116 - 124
國際標準期刊號0169-555X
語言英式英語
關鍵詞Aspect and slope; Gravels; Imbrication; Inclination index
Web of Science 學科類別Geography, Physical; GEOGRAPHY, PHYSICAL; Geology; Geosciences, Multidisciplinary; GEOSCIENCES, MULTIDISCIPLINARY; Physical Geography

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