Size-frequency distribution of landslides in different landforms on the loess plateau of Northern Shaanxi

被引：7

作者：

Qiu H. ^{[1
,2
]}

Cui P. ^{[1
]}

Hu S. ^{[2
]}

Liu Q. ^{[2
]}

Wang Y. ^{[3
]}

Gao Y. ^{[2
]}

Deng M. ^{[2
]}

机构：

[1] Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu

[2] College of Urban and Environmental Science, Northwest University, Xi'an

[3] School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2016年 / 41卷 / 02期

关键词：

Gamma function; Landslide; Loess plateau; Size-frequency;

D O I：

10.3799/dqkx.2016.026

中图分类号：

学科分类号：

摘要：

Loess landslide is the most catastrophic geohazard in the northwest area of China. Frequency distribution plays an important role in prediction and risk assessment of landslides since it can be used to find out certain distribution laws in different landslides. In this paper, the loess landslide distribution is studied by using method of grain size analysis theory, and the authors put forward the concept of landslide size diameter and use the Gamma distribution curve to fit size-frequency of landslides in different landforms of the loess plateau. The results show that: (1) At the regional scale, landslides can be viewed as “particles” widely distributed in the area, regional landslide scale percentage and its distribution can be obtained by application of grain size analysis theories and methods; (2) At log-log coordinates, frequency curve has a “rollover effect”, and the Gamma distribution function describes well the size frequency distribution of landslides; (3) The loess landslide scale variation or discrete degree decreases from loess tableland to loess hill in Baota district which is mainly covered by loess ridge suffering most serious threat of the landslide disasters both in number and size. © 2016, Editorial Department of Earth Science. All right reserved.

引用

页码：343 / 350

页数：7

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