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    陕北黄土高原不同地貌类型区黄土滑坡频率分布

    邱海军 崔鹏 胡胜 刘琪 王彦民 高宇 邓妹凤

    邱海军, 崔鹏, 胡胜, 刘琪, 王彦民, 高宇, 邓妹凤, 2016. 陕北黄土高原不同地貌类型区黄土滑坡频率分布. 地球科学, 41(2): 343-350. doi: 10.3799/dqkx.2016.026
    引用本文: 邱海军, 崔鹏, 胡胜, 刘琪, 王彦民, 高宇, 邓妹凤, 2016. 陕北黄土高原不同地貌类型区黄土滑坡频率分布. 地球科学, 41(2): 343-350. doi: 10.3799/dqkx.2016.026
    Qiu Haijun, Cui Peng, Hu Sheng, Liu Qi, Wang Yanmin, Gao Yu, Deng Meifeng, 2016. Size-Frequency Distribution of Landslides in Different Landforms on the Loess Plateau of Northern Shaanxi. Earth Science, 41(2): 343-350. doi: 10.3799/dqkx.2016.026
    Citation: Qiu Haijun, Cui Peng, Hu Sheng, Liu Qi, Wang Yanmin, Gao Yu, Deng Meifeng, 2016. Size-Frequency Distribution of Landslides in Different Landforms on the Loess Plateau of Northern Shaanxi. Earth Science, 41(2): 343-350. doi: 10.3799/dqkx.2016.026

    陕北黄土高原不同地貌类型区黄土滑坡频率分布

    doi: 10.3799/dqkx.2016.026
    基金项目: 

    西北大学科学研究基金 12NW32

    陕西省自然科学基础研究计划资助项目 2014JQ2-4021

    国家自然科学基金项目 41401602

    详细信息
      作者简介:

      邱海军(1983-),男,副教授,博士,从事自然地理学等相关教学研究工作.E-mail: rgbitxpl@163.com

    • 中图分类号: P954

    Size-Frequency Distribution of Landslides in Different Landforms on the Loess Plateau of Northern Shaanxi

    • 摘要: 黄土滑坡是西北地区最为严重的地质灾害.频率分布对于区域滑坡风险评估具有重要的意义,借鉴粒度分析方法研究黄土滑坡分布情况,提出滑坡规模径概念,并通过Gamma分布函数对滑坡规模频率曲线进行了拟合.结果表明:(1) 在区域尺度上,可以借鉴粒度分析的理论和方法分析区域滑坡规模百分含量;(2) 在双对数坐标下,频率曲线具有“偏转效应”,而Gamma分布函数在描述滑坡规模径频率分布方面具有广泛的适应性,能够很好地拟合黄土滑坡规模频率;(3) 无论是黄土滑坡的数量还是规模,以墚为主的黄土丘陵区宝塔区都是受滑坡灾害威胁最为严重的区域;但黄土地貌在由塬向峁区的演变过程中,黄土滑坡规模变异或离散程度逐渐减小.

       

    • 图  1  研究区位置

      中国地图据中华人民共和国地图(1:22 000 000),2010年第一版,星球地图出版社,北京

      Fig.  1.  Location of the study area

      图  2  研究区黄土滑坡三轴几何平均径分布

      Fig.  2.  Distribution of different diameter class

      图  3  不同地貌类型区规模频率分布曲线偏转效应

      Fig.  3.  Rollover of cumulative magnitude-frequency curve for the landslides in different county and district

      图  4  子洲县(黄土峁区)黄土滑坡三轴几何平均径Gamma P-P散点图(a)和无趋势Gamma P-P散点图(b)

      Fig.  4.  Gamma P-P plot (a) and detrended Gamma P-P plot (b) of landslide diameter in Zizhou County

      图  5  宝塔区(黄土墚区)黄土滑坡三轴几何平均径Gamma P-P散点图(a)和无趋势Gamma P-P散点图(b)

      Fig.  5.  Gamma P-P plot (a) and detrended Gamma P-P plot (b) of landslide diameter in Baota District

      图  6  洛川县(黄土塬区)黄土滑坡三轴几何平均径Gamma P-P散点图(a)和无趋势Gamma P-P散点图(b)

      Fig.  6.  Gamma P-P plot (a) and detrended Gamma P-P plot (b) of landslide diameter in Luochuan County

      图  7  基于Gamma分布函数的黄土滑坡规模径频率分布拟合

      Fig.  7.  Distribution fitting of loess landslide scale based on Gamma function

      图  8  3个县(区)黄土滑坡三轴几何规模径频率分布

      Fig.  8.  Frequency distribution of scale diameter of loess landslides

      表  1  不同累积频率下黄土滑坡发生规模径

      Table  1.   Scale diameter of loess landslides at different frequency

      累积频率(%) 5 25 50 75 95
      子洲县规模径(m) 82.03 56.78 42.63 31.07 18.52
      宝塔区规模径(m) 127.66 85.53 62.39 43.88 24.48
      洛川县规模径(m) 92.75 57.89 39.58 25.64 12.21
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    • 收稿日期:  2015-08-23
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