Multitemporal landslide inventory analysis of an intertropical mountain in west-central Mexico——Basis for hazard management  

作　　者：Alejandro Cesar VALDES CARRERA Manuel E.MENDOZA Teodoro CARLÓN ALLENDE Jose Luis MACIAS 

机构地区：[1]Centro de Investigaciones en Geografia Ambiental,Universidad Nacional Autonoma de Mexico,Morelia 58190,Mexico [2]Consejo Nacional de Ciencia y Tecnologia-Instituto de Geofisica-Unidad Michoacan,Universidad Nacional Autonoma de Mexico,Morelia 58190,Mexico [3]Instituto de Geofisica-Unidad Michoacan,Universidad Nacional Autonoma de Mexico,Morelia 58190,Mexico

出　　处：《Journal of Mountain Science》2022年第6期1650-1669,共20页山地科学学报（英文）

基　　金：financial support through the project UNAM PAPIIT IN108719“Dendrogeomorfología y evaluación de peligros en ambientes de monta?as.”。

摘　　要：Landslides in intertropical mountainous areas of Mexico are a natural hazard that could potentially generate a disaster. Despite this, many areas lack landslide inventories, making it difficult to monitor and efficiently manage the associated risks for local populations. For this reason, the aim of this research was to undertake a multitemporal landslide inventory and analyze its conditioning factors in the Pico de Tancítaro stratovolcano, which, in recent decades, has presented several high-risk geomorphological events with disastrous consequences for nearby localities. The spatial distribution of landslides and its conditioning factors were mapped at a 1:50,000 scale for the 1995-2020 period, through visual interpretation of orthophotos and satellite images(Landsat, SPOT, and SENTINEL). The conditioning factors that link the most to landslides were Quaternary andesite and basaltic andesite rocks;volcanic cones, mountain river valleys, and very steep to steep slopes(30° to >45°), oriented to the South, North, and East;Andosols and Leptosols;and the oyamel fir and mixed forests. 505 landslide events classified into slides and flows that occurred in 1995, 2004, 2010, and 2015 were identified. New scars generated by the reactivation of landslide processes were also observed. The landslides in the study area were triggered by torrential rains caused by hurricanes and tropical storms;such as hurricanes Alex and Patricia. The inventory and analysis of conditioning factors highlighted the distribution and dynamics of slides and flows in the study area. In addition, the most important factors for studies of landslide susceptibility, hazards, and risks in the Pico de Tancítaro stratovolcano were identified, contributing to the management of geomorphological risks in intertropical mountain areas.

关 键 词：GEOMORPHOLOGY Mass wasting Natural hazards Pico de Tancítaro stratovolcano Risk management 

分 类 号：P642.22[天文地球—工程地质学]