Analysis of Hazard, Vulnerability and Risk of Mass Movements in Talus Located - Natal/RN - Brazil

2017 ◽  
Vol 863 ◽  
pp. 355-360
Author(s):  
Laddyla T.V. Bezerra ◽  
Osvaldo Freitas Neto ◽  
Olavo Santos Jr.
Keyword(s):  
Drainage System ◽  
Mass Movements ◽  
Surface Dynamics ◽  
Human Occupation ◽  
Natural Processes ◽  
Hazard Vulnerability ◽  
Degree Of Risk ◽  
High Degree ◽  
Cut Slopes ◽  
Steep Slopes

Despite being natural processes of the Earth’s surface dynamics, mass movements can be accelerated or sparked by human interference. Human activities such as developments in highly susceptible mass movements areas have been the main cause of accidents linked to landslides in Brazilian urban hillsides. In Natal - RN, the existence of areas with high declivity combined with inappropriate human occupation has been making the city vulnerable to stability problems of slopes. In this context, this work aimed to map the risk and analyze situations of hazard, vulnerability, and risk of incidence of mass movements present in São José do Jacó community, in Rocas neighborhood, Natal/RN. In order to map the risk, the methodology proposed by [1] was applied and adjusted to the characteristics of the study area. The mapping results showed that São José do Jacó presented a high degree of risk, ranging from high to very high. The analysis of hazard, vulnerability and risk has made possible to observe the factors that triggers mass movements in the area, among which: steep slopes, disordered cut slopes, dense occupation, inefficient drainage system, septic tanks and cesspools on the edge or in the middle of the talus and low/medium vegetation cover can be identified. The detailed research of the hazard, vulnerability and risk situations found in São José do Jacó community has enabled a better understanding of the area’s aspects, which lead to the obtention of high degree of risk.

scholarly journals Avaliação da suscetibilidade aos movimentos de massa a partir de variáveis morfométricas na interface entre o planalto meridional e a depressão central da região do Vale do Taquari – Rio Grande do Sul

2021 ◽  
Vol 43 ◽  
pp. e44
Author(s):  
Tainara Godoy de Souza ◽  
Áquila Ferreira Mesquita ◽  
Alexandre Felipe Bruch
Keyword(s):  
Analytical Hierarchy Process ◽  
Low Cost ◽  
Rio Grande ◽  
Mass Movements ◽  
Rio Grande Do Sul ◽  
Natural Processes ◽  
Gis Software ◽  
High Degree ◽  
Hierarchy Process ◽  
Geomorphologic Analysis

The occurrence of disasters in Brazil by natural processes has been increasing along the years. One of these phenomena is mass movements, a destructive phenomenon which may cause damage to socioeconomic. The morphometric variables are becoming useful in geomorphologic analysis, mainly in diagnosis of susceptible areas to those processes. This way, the objective of this work is to identify susceptible areas of mass movements in the interface between meridional plateau and the central depression in Vale do Taquari region, using geomorphometric variable at a scale of 1:250.000. This morphometric analysis contains Remote Sensing and geoprocessing, so it becomes an effective and low cost method. GIS software (Geographic Information System) was used to maps algebra from the statistical methods AHP (Analytical Hierarchy Process) and Delphi, in which pondering and the hierarchy of influential variables in this analysis. The final product is an analysis map of susceptibility to mass movements in the mentioned region. In the map it is observed that the region has a high degree of susceptibility in most aspects. With this data it is possible to carry out a proper planning and management of the territory, providing more safety to the occupation of those areas.

scholarly journals Quality risks and logistics processes in major repairs of buildings

2020 ◽  
Vol 157 ◽  
pp. 06024
Author(s):  
Evgeniy Degaev ◽  
Vladimir Rimshin ◽  
Victoria Borkovskaya ◽  
Igor Shubin
Keyword(s):  
Degree Of Risk ◽  
High Degree

Housing and utilities in modern Russia is at the stage of its development and in particular the management of logistics flows, as a result, the functioning of this sector of the economy is subject to a high degree of risk. In the housing and utilities sector, risks entail not only losses for managers and resource supply companies, but also the likelihood of losses in providing services to the consumer, namely, the low quality of produced housing and utilities.

scholarly journals Considerations on the Use of Explosive Substances for the Destruction of Metallic Structures

2019 ◽  
Vol 24 (2) ◽  
pp. 139-144
Author(s):  
Florin Ilie ◽  
Mircea Vladu ◽  
Gabriela Mihăilă-Lică ◽  
Bogdan-Mihai Georgescu
Keyword(s):  
Public Order ◽  
Metallic Materials ◽  
Metallic Elements ◽  
Metallic Structure ◽  
Destructive Effect ◽  
Metallic Structures ◽  
Degree Of Risk ◽  
Explosive Substance ◽  
High Degree

Abstract Incidents with IEDs containing metallic elements in the vicinity of the explosive substance pose a high degree of risk, endangering safety, peace and public order. In such situations, the methods and procedures applied as response by the authorities are cumbersome and risky, given the improvised nature of these incidents. In this paper we intend to analyze the destructive effect of explosive substances on certain metallic materials and we focus on a U-shaped metallic structure.

scholarly journals Mapeamento de Áreas Suscetíveis a Deslizamentos e Zoneamento de Risco no Município de Três Coroas-RS (Mapping of Areas Susceptible to Landslides and Risk Zoning in the City of Três Coroas-RS)

2016 ◽  
Vol 9 (2) ◽  
pp. 456
Author(s):  
Eduardo Samuel Riffel ◽  
Laurindo Antonio Guasselli
Keyword(s):  
Mass Movement ◽  
Mass Movements ◽  
Anthropogenic Influences ◽  
High Slope ◽  
Geomorphological Units ◽  
Risk Areas ◽  
Relationship Of ◽  
Steep Slopes ◽  
The Relationship ◽  
The City

Este trabalho consiste em um estudo realizado no município de Três Coroas - RS. Foram analisadas as ocorrências recentes de movimentos de massa e sua relação com as zonas de risco estabelecidas pela CPRM. A partir de parâmetros morfométricos, buscaram-se identificar os padrões de ocorrência de deslizamentos. Também buscou-se analisar a contribuição da ocupação para tais ocorrências, incluindo outros fatores que estão relacionados a movimentos de massa. A partir do padrão de ocorrência de movimentos de massa identificados no município, foi feito um mapa de áreas suscetíveis a movimentos de massa, dividido em 3 classes: alta, média e baixa suscetibilidade, e foi relacionado com as áreas de risco do município. Observou-se que algumas das ocorrências estão localizadas em áreas de vertentes côncavas e encostas íngremes, com exceção das que têm influências antropogênicas, que estão localizados em encostas convexas. Um fato que pode ser explicado pelo tipo de ocupação de área, que ocorre principalmente em pistas convexas e encostas íngremes, influenciada pela topografia da região. Pode-se também ver uma lista de ocorrências de deslizamentos de terra que resulta em áreas sensíveis para as áreas de risco estabelecidas pela CPRM, explicado pelo fato de que as ocupações geralmente se dão em áreas de alta declividade.   Abstract This work consists of a study conducted in the municipality of Três Coroas – RS. Recent occurrences of mass movements and their relationship to the risk areas established by CPRM were analyzed. From modeled geomorphological maps, geomorphological units, slope and altimetry, we sought to identify patterns in the occurrence of landslides. Also aimed to analyze the relationship of the occupation to the occurrence of such disasters, including other factors that are related to mass movements. From the pattern of occurrence of mass movements identified in the county, was made a map of susceptible to mass movement areas, divided into 3 classes: high, medium and low susceptibility, and it was related to the risk areas of the municipality. It was observed that some of the occurrences of mass movements are located in areas of concave slopes, and steep slopes, except for occurrences that have large anthropogenic influences, which are located on convex slopes. A fact that can be explained by the type of occupation of the area, which occurs mainly in convex slopes and steep slopes, influenced by the topography of the region. One can also see a list of occurrences of landslides and results areas as susceptible to the risk areas established by CPRM, explained by the fact that the occupations will generally give in areas of high slope. Keywords: Risk Areas. Mass Movements. Remote Sensing.     

scholarly journals Análise metodológica de estudos referentes a eventos de movimentos de massa e erosão ocorridos na região Nordeste do Brasil / A methodological analysis of studies regarding events of mass and erosion movements occurring in the northeast region of Brazil

2018 ◽  
Vol 28 (55) ◽  
pp. 959-979
Author(s):  
Caio Lima Dos Santos ◽  
Fabrízio De Luiz Rosito Listo ◽  
Osvaldo Girão Da Silva ◽  
Rafael Brito Dos Reis
Keyword(s):  
Mass Movement ◽  
Integrated System ◽  
Northeastern Brazil ◽  
Mass Movements ◽  
Surface Dynamics ◽  
Natural Conditions ◽  
Analytical Methodology ◽  
Northeast Region ◽  
Erosion Processes ◽  
Brazilian Northeast

A presente pesquisa tem por objetivo descrever e contabilizar os casos oficiais reconhecidos pelo sistema integrado de informações sobre desastres e pelo Atlas Brasileiro de desastres naturais referente a ocorrências de eventos de movimento de massa e de erosão ocorridos na região Nordeste do Brasil, bem como analisar os principais métodos utilizados para avaliação destes fenômenos (técnicas de campo, laboratório e geoprocessamento). Conforme a análise dos dados, foi verificado que os estados de Pernambuco e da Bahia apresentaram o maior número de ocorrências destes processos na região Nordeste, estando esse fato relacionado as condições físicas-naturais e as formas de uso da terra. Em termos metodológicos, é predominante no nordeste brasileiro a utilização de metodologias analíticas com a finalidade de identificação de áreas de risco de deslizamentos, considerando-se os condicionantes naturais e antrópicos.Palavras–chave: Dinâmicas Superficiais, movimentos de massa, processos erosivos, Nordeste do Brasil.Abstract The present research aims to describe and account for official cases recognized by the integrated system of information on disasters and the Brazilian atlas of natural disasters related to events of mass movement and erosion occurred in the Northeast region of Brazil, as well as to analyze the main methods used for the evaluation of these phenomena (field techniques, laboratory and geoprocessing). According to the analysis of the data, it was verified that the states of Pernambuco and Bahia present the largest number of mass movement and erosion occurrences in the Northeast, being this fact related to the physical-natural conditions and the forms of surface occupation. In methodological terms, it is verified that in the Brazilian Northeast the analytical methodology is widely used in order to identify areas of risk of landslides, taking into account the natural and anthropogenic conditions.Keywords: Surface dynamics, mass movements, erosion processes, northeastern Brazil. 

scholarly journals Concerning Specific Features of M&A Management

2020 ◽  
Vol 17 (4) ◽  
pp. 181-186
Author(s):  
X. V. Sadykova ◽  
E. S. Biryukov
Keyword(s):  
Strategic Management ◽  
Conventional Method ◽  
National Economy ◽  
Corporate Management ◽  
Executive Directors ◽  
Synergy Effect ◽  
New Markets ◽  
Agent Theory ◽  
Degree Of Risk ◽  
High Degree

Today global and national economy is facing numerous hardly predictable events, which N. Talleb called ‘the black swam’ events, i.e. events having serious consequences both for economy in general and for industries in particular. Integrated corporate structures are still being formed at the expense of M&A deals. Statistic and diagnostic of M&A deals in leading companies testify that these deals have a high degree of risk, while classical management in M&A developed in the last 20 years requires drastic changes. Finance community considers acquisition of new businesses as a conventional method of getting different preferences, such as knowledge and skill diffusion in the field of innovation, opportunity of penetrating new markets, possible obtaining the synergy effect, including one within the frames of ‘the so-called ‘mum’s bias’. By studying global and home experience we can clearly observe that the majority of companies-buyers (or companies-aggressors) pursue policy of acquisition in respect of companiestargets, in other words, the company-target is not considered as an object of any investment. It could be investment in capital, in optimization of the system of strategic management in the company-target or in upgrading businessmodel, etc. In this respect the authors study specific features of corporate management within the frames of ShareholderActivism, non-executive directors and agent theory, identify contradictions and show changes in these fields.

scholarly journals An Evaluation of Expected Value and Expected Value-Variance Criteria in Achieving Risk Efficiency in Crop Selection

1987 ◽  
Vol 16 (2) ◽  
pp. 93-101 ◽  
Author(s):  
Donald W. Reid ◽  
Bernard V. Tew
Keyword(s):  
Expected Value ◽  
Expected Returns ◽  
Crop Selection ◽  
Selection Analysis ◽  
Degree Of Risk ◽  
High Degree ◽  
Variance Criterion

This article evaluates the performance of expected value and expected value-variance criteria in achieving risk efficiency in crop selection. Results indicate that the expected returns criterion achieves risk efficiency in many situations because of constraints. However, in the absence of many constraints the expected returns criterion performs poorly except when highly mean-dominant activities are present. The expected value-variance criterion achieves a high degree of risk efficiency for all situations examined. This result implies that criteria more complex than expected value-variance are not necessary for crop selection analysis, given empirical returns distributions.

Observed Formation and Burial of a Recent Human Occupation Site in Kenya

1977 ◽  
Vol 8 (3) ◽  
pp. 245-266 ◽  
Author(s):  
Diane P. Gifford ◽  
A. Kay Behrensmeyer
Keyword(s):  
Laboratory Data ◽  
Drainage System ◽  
Bone Transport ◽  
Flood Events ◽  
Human Occupation ◽  
Northern Kenya ◽  
Data Yield ◽  
Local Water ◽  
Detailed Picture ◽  
Small Bone

A recent human campsite, occupied in 1973 by members of the Dassanetch tribe of northern Kenya, was observed from its creation through its subsequent burial in flood events 4 months later. The site was excavated as an archeological occurrence in the summer of 1974. Analyses of field and laboratory data yield a detailed picture of sedimentary structures, bone transport and burial, and site preservation in a well-documented depositional situation. Trampling by site occupants was apparently instrumental in burying much small bone prior to the flood events which acted on the site. About 30 cm of sediments accumulated on the site during four or five flood events. Individual sedimentary beds can be related to specific observed flood events in the drainage system. The ultimate preservation of the site as part of the region's archeological record would depend upon the interaction of sediment deflation and the varying local water table. Specific conditions which tend to preserve human sites in water-poor environments may consistently select seasonally biased vestiges of human settlement and economy.

scholarly journals Vulnerability to geomorphological hazards of an Arctic cliff-nesting raptor, the rough-legged hawk

2017 ◽  
Vol 3 (2) ◽  
pp. 203-219 ◽  
Author(s):  
Andréanne Beardsell ◽  
Gilles Gauthier ◽  
Daniel Fortier ◽  
Jean-François Therrien ◽  
Joël Bêty
Keyword(s):  
Climate Change ◽  
Sedimentary Rocks ◽  
Unconsolidated Sediments ◽  
Mass Movements ◽  
Factors Associated ◽  
Temperature And Precipitation ◽  
Bylot Island ◽  
Geomorphological Processes ◽  
Steep Slopes ◽  
Buteo Lagopus

Increase in temperature and precipitation associated with climate change may enhance the risk of destruction by geomorphological processes of nests or dens used by Arctic wildlife. We assessed nest vulnerability to mass movements and identified environmental factors associated with the persistence of nesting structures of rough-legged hawks (Buteo lagopus), a species that typically nests on steep slopes or cliffs. The study was conducted on Bylot Island (Nunavut) where 82 permanent hawk nesting structures, built mainly on sedimentary rocks, were monitored from 2007 to 2015. More than a quarter of known nests were destroyed during the course of the study and among those still intact, more than half were associated with a moderate to high risk of being destroyed. Nest survival analysis suggested a relatively short persistence of rough-legged hawk nesting structures on Bylot Island compared to other Arctic cliff-nesting species. Nest destruction probability increased for nests built on unconsolidated sediments, with heavy rainfall and temperature during the summer. The anticipated increase in precipitation and temperature due to climate change is likely to augment the exposure of hawk nests to mass movements, which could ultimately reduce the availability of suitable sites for the reproduction of this Arctic-nesting raptor.

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