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Identification and Extraction of Geomorphological Features of Landslides Using Slope Units for Landslide Analysis
Wang, Kai1,2; Xu, Hui3; Zhang, Shaojie4; Wei, Fangqiang5; Xie, Wanli1
2020-04-01
摘要A slope unit is commonly used as calculation unit for regional landslide analysis. However, the capacity of the slope unit to reflect the geomorphological features of actual landslides still needs to be verified. This is because such accurate representation is critical to ensure the physical meaning of results from subsequent landslide stability analysis. This paper presents work conducted on landslides and slope extraction in two areas in China: The Jiangjia Gully area (Yunnan Province) and Fengjie County (Chongqing Municipality). Ground-based light detection and ranging (LiDAR) data are combined with field landslide terrace measurements to allow for the comparison of slope unit extraction methods (conventional vs. MIA-HSU) in terms of their ability to reflect the geomorphological features of shallow and deep-seated landslides. The results indicate that slope unit boundaries extracted by the conventional method do not match the geomorphological variations of actual landslides, and the method is therefore deficient in meaningfully extracting slope units for further landslide analysis. By contrast, slope units obtained using the MIA-HSU method accurately reflects the geomorphological features of both shallow and deep-seated landslides, and thus provides clearer geomorphological meaning and more reasonable calculation units for regional landslide assessment and prediction.
关键词slope unit MIA-HSU method landslide geomorphological features
DOI10.3390/ijgi9040274
发表期刊ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION
卷号9期号:4页码:18
通讯作者Xu, Hui(xuhui@cma.gov.cn)
收录类别SCI
WOS记录号WOS:000539535700089
语种英语