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A new slope unit extraction method for regional landslide analysis based on morphological image analysis
Wang, Kai1,2; Zhang, Shaojie1; DelgadoTellez, Ricardo1; Wei, Fangqiang3
2019-09-01
摘要In landslide analysis it is necessary to first define and extract slope units from remotely sensed data. When this is done using hydrological process analysis, there can be complications caused by apparent sudden changes in slope gradient, resulting in the assumption of homogeneity of regional slope stability not being met. This issue is addressed in this paper with the proposal of a novel slope unit extraction method, which is derived from morphological image analysis (MIA) and results in the extraction of homogeneous slope units (HSU). It is thus referred to as the MIA-HSU method. In this method, slope units are defined as small, closed and homogeneous in 3D space. The MIA method uses logical algorithms, such as expansion and erosion, to extract slope units. Jiangjia Gully, Yunnan Province, China was selected to test the MIA-HSU method. Results indicate that slope units extracted by this method overcome defects of sudden changes in slope gradient and are able to identify geographical features meaningful for further landslide analysis. The MIA-HSU method presents a more uniform slope and aspect, and is better suited to regional landslide analysis than data obtained using the hydrological process analysis method.
关键词Slope unit Homogeneity assumption Slope stability analysis Morphology image analysis
DOI10.1007/s10064-018-1389-0
发表期刊BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN1435-9529
卷号78期号:6页码:4139-4151
通讯作者Zhang, Shaojie(sj-zhang@imde.ac.cn)
收录类别SCI
WOS记录号WOS:000482240400020
语种英语