Study on the Geohazard Distribution Laws and Hazard-Causing Mechanism in Menghai County of Yunnan Province


Menghai County
Distribution law
Hazard-causing mechanism




The study area is located at the southwest border of Yunnan Province and the southward extended part of Nushan Mountain, with complex and fragile geo-environmental conditions. Deep geological survey and mathematical analytical investigation on the geohazard distribution and hazard-causing mechanisms in this area were carried out in this study. The results revealed that: (1) The development of geohazards was affected differently by different slope shapes, slope structures and elevations; (2) Most of the geohazards were developed in medium shallow cut ridge-like medium-height mountainous geomorphological region and shallow cut steamed bun-like low and medium-height mountainous geomorphological region, and they were relatively concentrated on tectonic zones like fault zones; (3) The slopes formed by loose earth piling up on the surface of Indo-Chinese magmatic rock and Lancang Group metamorphic rock formations were most prone to slope instability and even landslide. The deep study on the geohazard distribution and hazard-causing mechanisms can provide geoscientific basis and reference for the prevention and mitigation work of geohazards under similar geo-environmental conditions.


Zhang J, Kang XB, Lu H, et al., 2018, Study on Spatial Distribution of Geological Disasters in Middle Part of Ailao Mountain: A Case of Yuanjiang County. Journal of Engineering Geology, 26(03): 720-731.

Bai YJ, Li MH, Wang DH et al., 2014, Characteristics and Disastrous Rule Research of Geohazards in Batang County, the Middle Reaches of Jinsha River. The Chinese Journal of Geological Hazard and Control, 25(02): 103-109.

Li CY, Meng H, Zhang RL, Li YM, 2017, Risk Assessment of Geo-Hazard of China in County Unit. Hydrogeology & Engineering Geology, 44(02): 160-166.

Kang XB, Cao J, Hei MC, et al., 2017, Detailed Investigation Report on Geological Disasters in Menghai County, Yunnan Province. Kunming: Yunnan Institute of Geo-environmental Monitoring.

Wu FQ, Lan HX, 2016, International Research Status and Frontiers on Engineering Geology and The Environment: A Review on IAEG XII congress. Journal of Engineering Geology, 24(01): 116-129.

Huang RQ, Qi SW, 2017, Engineering Geology: Review and Prospect of Past Ten Years in China. Journal of Engineering Geology, 25(02): 257-276.

Guan FJ, Shen WZ, 2016, Study on Situation Analysis and Prevention of Geological Disasters in China. Hydrogeology & Engineering Geology, 43(02): 7-10.

Zhao SS, 2016, Study on Formation Mechanism and Dangerousness Zoning of Geological Disasters in Eryuan County, Yunnan Province. China University of Geosciences (Beijing).

Fu HX, 2017, Development Characteristics and Preventive and Control Countermeasures of Geological Disasters in Mountainous Regions of Pu’er City. Yunnan Water Power, 33(03): 32-34+60.

Qi Q, 2012, Evaluation Research on the Susceptibility Degree of Geological Disasters in Yuanyang County based on GIS and Hierarchy of Objectives Combined Analysis Method. China University of Geosciences (Beijing).

Xiong DQ, 2009, A Study on Emergency Investigation and Hazard Assessment of 5.12 Wenchuan Earthquake Triggered Geological Hazards in Li County. Chengdu University of Technology.