Geophysical prospecting related to earthflow reactivation and hazard assessment: a study based on Huangnibazi slope failure in Sichuan Province, China

In the marine carbonate area of the upper Yangtze region, southern China, including parts of Guizhou and Sichuan Provinces, complex subsurface structures and undulating surface terrain exist because of multiple tectonic events. Various geophysical prospecting methods have been conducted in local areas in an attempt to map these structures. In the Guizhou Plateau, a carbonate‐exposed area, crooked seismic lines were acquired using vibrators as the main source, supplemented with dynamite. In Sichuan Province, a mountainous area, regional seismic profiles, wide‐line profiling, and 3-D seismic surveys were conducted. These were accomplished with portable air drills and human transport. Data processing techniques were designed to improve data quality in the presence of noise and to image complex structures. In central Sichuan Province, high‐resolution and converted‐wave seismic surveys were carried out for imaging complex structures and for collecting lithologic parameters. These methods have enabled us to get effective information from complex structural, mountainous, and carbonate‐exposed hilly areas in the upper Yangtze region of southern China. These collective efforts have produced a database appropriate for sedimentology, tectonic, and prospective area evaluation studies.

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Analysis of Rock Slope Failure and Rockfall for Preliminary Hazard Assessment of the Cliff at Chau Thoi Quarry

Lecture Notes in Civil Engineering - Proceedings of the International Conference on Innovations for Sustainable and Responsible Mining ◽

10.1007/978-3-030-60269-7_12 ◽

2020 ◽

pp. 230-249

Author(s):

Nguyen Quang Tuan

Keyword(s):

Hazard Assessment ◽

Slope Failure ◽

Rock Slope

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Landslide hazard assessment using digital elevation models

Canadian Geotechnical Journal ◽

10.1139/cgj-2011-0342 ◽

2013 ◽

Vol 50 (6) ◽

pp. 620-631 ◽

Cited By ~ 6

Author(s):

Gordon A. Fenton ◽

Amanda McLean ◽

Farrokh Nadim ◽

D.V. Griffiths

Keyword(s):

Hazard Assessment ◽

Slope Failure ◽

Digital Elevation Models ◽

Landslide Hazard ◽

Mitigation Strategies ◽

Human Beings ◽

Maximum Slope ◽

Vast Number ◽

Landslide Hazard Assessment ◽

Digital Elevation

Human beings are, in general, risk-averse and willing to go to great lengths to reduce failure consequences. However, if the underlying issues are not understood, effective action cannot properly be taken. A landslide hazard assessment framework capable of estimating regional probabilities of slope failure can be used to aid a vast number of communities currently living in landslide “danger zones”. Such a framework would provide a tool with which community resources can be optimized and ensure that appropriate preparedness and mitigation strategies are in place. Maximum slope angles, as estimated using digital elevation models (DEMs), are one of the most important indicators for landslide hazard assessment. This paper uses local averaging theory to determine how the resolution of DEMs affects regional landslide probability estimates. Emphasis is on a regional landslide hazard assessment, measured by the probability that one or more slopes of at least a critical minimum scale will fail within the region.

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