APPLICATION OF MORISHITA SPREAD INDEX TO TEMPORAL AND SPATIAL DISTRIBUTION CHARACTERISTICS OF LANDSLIDES IN SHANXI AND GANSU PROVINCES OF CHINA

Luo Wenqiang

¹Department of Mathematics and Physics, China University of Geosciences,

Wuhan, Hubei, 430074, China

Luo Wenqiang Zhang Zhuoyuan and Huang Runqiu

²Institute of Engineering Geology, Chengdu Institute of Technology,

Chengdu, Sichuang, 610059, China

Morshita Spread Index Id was applied for the study of temporal and spatial distribution characteristics of landslides in the Shanxi and Gansu provinces of China. For this purpose, the landslides larger than 105 m³in volume were considered. In the study area, the spatial distribution of Morishita Spread Index I_d (l) is greater than 1 and decreases with increasing mesh scale. Such a trend indicates cluster distribution of landslides. On the other hand, the temporal distribution of Morishita Spread Index I_d(t) for the above landslides showed a maximum and a minimum, corresponding to the years with high frequency of landslide occurrence.