Repositorio UFRO · Omeka S

Effects of Tectonic Setting and Hydraulic Properties on Silent Large-Scale Landslides: A Case Study of the Zhaobishan Landslide, China

Primer Autor	Hu, Guisheng
Co-autores	Tian, Shufeng Chen, Ningsheng Rahman, Mahfuzur Ni, Huayong Somos-Valenzuela, Marcelo
Título	Effects of Tectonic Setting and Hydraulic Properties on Silent Large-Scale Landslides: A Case Study of the Zhaobishan Landslide, China
Editorial	SPRINGER
Revista	INTERNATIONAL JOURNAL OF DISASTER RISK SCIENCE
Lenguaje	en
Resumen	Unlike strong earthquake-triggered or heavy rainfall-triggered landslides, silent large-scale landslides (SLL) occur without significant triggering factors and cause unexpected significant disaster risks and mass casualties. Understanding the initiation mechanism of SLLs is crucial for risk reduction. In this study, the mechanism of the Zhaobishan SLL was investigated, and the SLL was jointly controlled by weak-soil (fractured rock mass) and strong-water (abundant water replenishment) conditions under the impact of active tectonism and complex hydraulic properties. Strong tectonic uplift, high fault density, and historical earthquakes led to weak-soil conditions conducive to the Zhaobishan SLL. The combined effect of unique lithology, antiform, and cultivated land contributed to the water replenishment characteristics of extensive runoff confluence (3.16 times that of the landslide body) and supported long-distance groundwater replenishment, thereby forming strong-water conditions for the landslide. The amplified seepage amount caused the strength of the soil mass on the sliding surface to decrease to 0.4 times its initial strength, eventually triggering the Zhaobishan SLL, which occurred 4.6 days after the peak rainfall. Moreover, the landslide deposits have accumulated on the semi-diagenetic clay rock, thereby controlling the subsequent recurring debris flows in the Lengzi Gully. To reduce disaster risk of SLL in vulnerable mountainous regions, the water confluence area behind the main scarp of the landslides and the hysteresis characteristics between landslides and peak rainfall should be further considered, and recurring debris flows following massive landslides also should be focused.
Fecha Publicación	2023
Tipo de Recurso	artículo original
doi	10.1007/s13753-023-00502-0
Formato Recurso	PDF
Palabras Claves	Debris flow Hydraulic properties Risk reduction Runoff amplification Silent large-scale landslides (SLL) Tectonic setting
Ubicación del archivo	http://dx.doi.org/10.1007/s13753-023-00502-0
Categoría OCDE	Geología Meteorología y Ciencias Atmosféricas Recursos Hídricos
Materias	Flujo de escombros Propiedades hidráulicas La reducción de riesgos amplificación de escorrentía Deslizamientos de tierra silenciosos a gran escala (SLL) entorno tectónico
Página de inicio (Recomendado-único)	600.0
Página final (Recomendado-único)	617
Identificador del recurso (Mandatado-único)	artículo original
Versión del recurso (Recomendado-único)	versión publicada
License	CC BY 4.0
Condición de la licencia (Recomendado-repetible)	CC BY 4.0
Derechos de acceso	acceso abierto
Access Rights	acceso abierto
Id de Web of Science	WOS:001059871100002
ISSN	2095-0055
Tipo de ruta	verde# dorada
Categoría WOS	Geología Meteorología y Ciencias Atmosféricas Recursos Hídricos
Referencia del Financiador (Mandatado si es aplicable-repetible)	NSFC U20A20110 STEP 2019QZKK0902 YIPA 2020367 CHAS 131C11KYSB20200033