Multitemporal landslide inventory analysis of an intertropical mountain in west-central Mexico - Basis for hazard management
Por:
VALDES CARRERA, Alejandro Cesar, Mendoza, Manuel E., Carlon Allende, Teodoro, MACIAS, JOSE LUIS
Publicada:
1 jun 2022
Resumen:
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
Tancitaro 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 degrees to >45 degrees), 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 Tancitaro
stratovolcano were identified, contributing to the management of
geomorphological risks in intertropical mountain areas.
Filiaciones:
VALDES CARRERA, Alejandro Cesar:
Univ Nacl Autonoma Mexico, Ctr Invest Geog Ambiental, Morelia 58190, Michoacan, Mexico
Mendoza, Manuel E.:
Univ Nacl Autonoma Mexico, Ctr Invest Geog Ambiental, Morelia 58190, Michoacan, Mexico
Carlon Allende, Teodoro:
Univ Nacl Autonoma Mexico, Consejo Nacl Ciencia & Tecnol, Inst Geofis, Unidad Michoacan, Morelia 58190, Michoacan, Mexico
MACIAS, JOSE LUIS:
Univ Nacl Autonoma Mexico, Inst Geofis, Unidad Michoacan, Morelia 58190, Michoacan, Mexico
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