theIASHub | 27 May, 2024 | 3
Context: As rescue efforts persist, the UN migration agency recently estimated that over 670 people may have perished in Papua New Guinea's extensive landslide.
Landslide
o A sudden movement of rock, boulders, earth or debris down a slope is termed as a landslide.
o Natural factors: Heavy rainfall, earthquakes, snow melting and undercutting of slopes due to flooding.
o Anthropogenic factors: Excavation, cutting of hills and trees, excessive infrastructure development, and overgrazing by cattle.
o Other factors: Lithology, geological structures like faults, hill slopes, drainage, geomorphology, land use and land cover, soil texture and depth, and weathering of rocks.
o Type of materials involved: Rock, debris, soil, loose mud),
o Type of movement of the material: Fall, topple, slide, rotational slide or translational slide, and
o Type of flow of the material.
o Another category is of landslides that spread laterally.
Papua New Guinea
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