气候变化领域集成服务门户(CCPortal): Triggering factors and critical thresholds for landslides in Rio de Janeiro-RJ, Brazil

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DOI	10.1007/s11069-021-04616-w
	Triggering factors and critical thresholds for landslides in Rio de Janeiro-RJ, Brazil
	Ehrlich M.; Luiz B.J.; Mendes C.G.; Lacerda W.A.
发表日期	2021
ISSN	0921030X
起始页码	937
结束页码	952
卷号	107 期号:1
英文摘要	The city of Rio de Janeiro undergoes periods of intense rainfall, and due to its geological and topographic characteristics, it is highly susceptible to landslides. Numerous structures have been built in areas at risk for landslides, using substandard techniques, primarily in poor neighborhoods. Critical thresholds for landslides in the city of Rio de Janeiro were established based on the combined effect of hourly intensity and accumulated rainfall over 96 h and an inventory of landslide available at Geotechnical Institute Foundation of Rio de Janeiro (GEO-RIO). Landslide events that occurred in the city from 1998 to 2002 were compared to those that took place from 2010 to 2012. The study aims to verify the effects of the slope stabilization work carried out by GEO-RIO and the population growth in areas highly susceptible to landslides during this period. The results indicate that the triggering factors for landslides in most of the areas were unchanged during these periods. Nevertheless, in spite of the investments in slope stabilization, the analyses pointed to a worsening condition in the most recent period for some regions, probably due to the increase in the irregular occupation (slums) in those areas. Some regions of the city were shown to be more susceptible to sliding than others due to differences in rainfall, geology, geomorphology and type of occupation. The results indicate that the early alarm system for the Rio de Janeiro city should be improved by specifying zone-dependent thresholds. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	critical thresholds early alarm systems Landslides triggering factors
英文关键词	early warning system; landslide; population growth; slope stabilization; threshold; trigger mechanism; Brazil; Rio de Janeiro [Brazil]; Rio de Janeiro [Rio de Janeiro (STT)]
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206205
作者单位	Department of Civil Engineering, COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21945-970, Brazil
推荐引用方式 GB/T 7714	Ehrlich M.,Luiz B.J.,Mendes C.G.,et al. Triggering factors and critical thresholds for landslides in Rio de Janeiro-RJ, Brazil[J],2021,107(1).
APA	Ehrlich M.,Luiz B.J.,Mendes C.G.,&Lacerda W.A..(2021).Triggering factors and critical thresholds for landslides in Rio de Janeiro-RJ, Brazil.Natural Hazards,107(1).
MLA	Ehrlich M.,et al."Triggering factors and critical thresholds for landslides in Rio de Janeiro-RJ, Brazil".Natural Hazards 107.1(2021).