Ye Runqing, Li Shiyao, Guo Fei, et al. 2021. RS and GIS analysis on relationship between landslide susceptibility and land use change in Three Gorges Reservoir area[J]. Journal of Engineering Geology, 29(3): 724-733. doi: 10.13544/j.cnki.jeg.2020-076.
    Citation: Ye Runqing, Li Shiyao, Guo Fei, et al. 2021. RS and GIS analysis on relationship between landslide susceptibility and land use change in Three Gorges Reservoir area[J]. Journal of Engineering Geology, 29(3): 724-733. doi: 10.13544/j.cnki.jeg.2020-076.

    RS AND GIS ANALYSIS ON RELATIONSHIP BETWEEN LANDSLIDE SUSCEPTIBILITY AND LAND USE CHANGE IN THREE GORGES RESERVOIR AREA

    • Since the construction of the Three Gorges Project,the land use types in the Reservoir Area have changed greatly. In order to get better coordination between landslide development and land use change since the impoundment of the Three Gorges Reservoir,this paper studies the land use change of the Yangtze River mainstream from Zigui to Badong,where is the head area of the Three Gorges Reservoir,based on image data in the year of 1987,2000,and 2010. The Landslide Area Modulus Ratio(Rsi) is used for analyzing and valuating the relationship between landslide development and land use change. The research result shows that:(1)From 1987 to 2010,the vegetation coverage rate in the study area decreased continuously,while the residential building area and cultivated land area increased continuously. (2)The Rsi value increases in vegetation area,cultivated land and residential building area in turn,increasing with the more intensive human activities,which indicates that landslide development is positively correlated with human activity intensity; (3)According to Rsi value,the study area is divided into three sub areas: high,medium and low area,and landslides are mainly distributed in high and medium areas,which is in good agreement with the actual situation. Therefore,it is necessary to consider the change of land use when carrying out landslide risk assessment in the reservoir area. This research is expected to provide theoretical support for land use planning,disaster prevention and mitigation in the Three Gorges Reservoir Area.
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