Size-Frequency Distribution of Landslides in Different Landforms on the Loess Plateau of Northern Shaanxi
Qiu Haijun
Cui Peng
Hu Sheng
Liu Qi
Wang Yanmin
Gao Yu
Deng Meifeng
Abstract：Loess landslide is the most catastrophic geohazard in the northwest area of China.Frequency distribution plays an im-portant 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 au-thors 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 "parti-cles"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 dis-crete 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.
Keywords：landslidesize-frequencyGamma functionloess plateau
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 343-350 )