叶润青, 李士篧, 郭飞, 等. 2021. 基于RS和GIS的三峡库区滑坡易发程度与土地利用变化的关系研究[J]. 工程地质学报, 29(3): 724-733. doi: 10.13544/j.cnki.jeg.2020-076.
    引用本文: 叶润青, 李士篧, 郭飞, 等. 2021. 基于RS和GIS的三峡库区滑坡易发程度与土地利用变化的关系研究[J]. 工程地质学报, 29(3): 724-733. doi: 10.13544/j.cnki.jeg.2020-076.
    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.

    基于RS和GIS的三峡库区滑坡易发程度与土地利用变化的关系研究

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

    • 摘要: 三峡工程建设以来,库区土地利用类型发生重大变化。为深入研究三峡库区蓄水以来滑坡发育与土地利用类型变化的关系,本文利用不同时期(1987年、2000年和2010年)卫星影像,研究三峡库首区秭归至巴东段长江干流土地利用类型变化,采用滑坡面积模数比(Rsi)分析滑坡发育与土地类型及变化的关联性。结果表明:(1)在1987~2010年间,研究区植被覆盖率持续下降,居民建筑区面积和耕地面积不断增长,蓄水后水域面积扩大了1倍;(2)植被区、耕地和居民建筑区的滑坡Rsi依次增大,滑坡Rsi随着人类活动强度增强而增大,表明滑坡发育与人类活动强度呈正相关性;(3)依据Rsi值大小,将研究区滑坡易发程度分为高、中和低3个区,滑坡主要分布在高、中易发程度区,与实际情况较吻合。因此,在开展库区滑坡风险评估时,需要考虑土地利用类型变化这一因素。研究结果以期为三峡库区土地利用规划、地质灾害防治提供理论支撑。

       

      Abstract: 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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