Note sur les laves torrentielles (Debris Flow) et les coulées boueuses (Mud Flow).

The Borah Peak, Idaho earthquake caused several hundred landslides throughout an area of about 4,200 km2. The most numerous landslides were rock falls and rock slides, which occurred where slopes contained conspicuous, through-going, open fractures or were composed of weakly cemented rocks. The earthquake also produced several slumps and cracks in man-made fill, several soil liquefaction phenomena, a large debris flow, a large mud flow, and a few ground failures of other types. The most significant landslide damage was in Challis, where rock falls damaged at least 3 houses and 2 automobiles.

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Avaliação das Construções Danificadas por Corridas de Detritos e Inundações Bruscas no Vale do Ribeira (SP) em 2014

Geography Department University of Sao Paulo ◽

10.11606/rdg.v0ispe.144423 ◽

2018 ◽

pp. 57-67

Author(s):

Luzia De Jesus Matos ◽

Claudio José Ferreira ◽

Carlos Valdir de Meneses Bateira ◽

Bianca Carvalho Vieira

Keyword(s):

Debris Flow ◽

Flash Flood ◽

Google Earth ◽

Mud Flow

O presente estudo quantifica o número de construções atingidas por eventos de escoamentos como as corridas de detritos (debris flow), de lama (mud flow) e as consequentes inundações rápidas (flash flood) ocorridas nos municípios de Itaoca e Apiaí, Vale do Ribeira, em janeiro de 2014. O percurso dos eventos de 2014 foi cartografado por meio da distribuição dos depósitos inconsolidados sobre as áreas construídas. Ferramentas como as imagens históricas do Google Earth (agosto de 2014), ortofotos, fotografias do mesmo ano e trabalhos de campo possibilitaram a visualização dos eventos e das construções conforme as seguintes etapas metodológicas: 1) Mapeamento das construções em anos anteriores aos eventos; 2) Mapeamento das corridas e inundações rápidas deflagradas em 2014; 3) Sistematização de dados e quantificação das construções atingidas. Ao todo, foram mapeadas 1.221 construções das quais 565 foram diretamente atingidas pelas corridas ou inundações rápidas. Resultados preliminares destacam que a densidade de construções na área de deflagração dos eventos aumenta a quantidade dos elementos atingidos; os impactos, entretanto, são condicionados pela variação dos tipos dos processos perigosos

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Late Miocene marine fossil-rich, rock-fall, avalanche, mud-flow and debris-flow deposits adjoining and near the western margin of the Tawhero Basin, outer forearc North Island, New Zealand

Transactions of the Royal Society of Edinburgh Earth Sciences ◽

10.1017/s026359330000256x ◽

1999 ◽

Vol 90 (3) ◽

pp. 189-201

Author(s):

G. Neef

Keyword(s):

New Zealand ◽

Debris Flow ◽

Fault Zone ◽

Late Miocene ◽

Pacific Plate ◽

Rock Fall ◽

Forearc Basin ◽

Western Margin ◽

Mud Flow

AbstractA late Miocene marine, massive fossil-rich, rock-fall/avalanche deposit, >42 m thick (base unexposed) and mud-flow and debris-flow deposits, commonly 0.2–4 m thick, are present adjoining and near to either margin of a 12 km long segment of the NE-trending Waihoki Fault/fault zone, near Pongaroa, North Wairarapa, North Island, New Zealand. The Waihoki Fault/fault zone lies in the outboard part of the onland part of the forearc. It forms the western margin of the Tawhero Basin, a forearc basin overlying a subducting Pacific plate, during 6.6–25 Ma. The basin had a partly dextral transpression history (especially in the Late Miocene) but the amount of dextral displacement along the Waihoki Fault/fault zone is unknown. It is likely that lightly indurated fossil-rich, rock-fall, mud-flow and debris-flow deposits were derived from the tops of fault slivers that were pushed upwards along the Waihoki Fault/fault zone during dextral faulting to reach the neritic zone.

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