Name: DAIANE RIBEIRO NUNES
Publication date: 28/02/2023
Examining board:
Name |
Role |
|---|---|
| ANTÔNIO JOSÉ TEIXEIRA GUERRA | Examinador Externo |
| EBERVAL MARCHIORO | Presidente |
| FABRICIA BENDA DE OLIVEIRA | Examinador Interno |
Summary: This study aims to create an inventory and analyze the spatiality and temporality of
mass movements data that occurred in the city of Castelo - ES, contributing to guide
future planning actions to mitigate or reduce the incidence of this type of event. In order
to carry out this work, it was decided to use the traditional method of inventory, through
analysis of historical and journalistic archives, scientific publications, technical reports
and decrees of Municipal and State Civil Defense and identification in the field with
photographic records of the areas of scars of mass movements events that occurred
in the municipality from 1983 to 2022. Among the conditioning agents identified in this
study, we can point out some examples that led to the outbreak of mass movements.
Accumulated rainfall was related to about 84% of landslide events; 82.3% of the events
occurred on slopes above 20 to 45%, of the strong wavy relief, 98.7% of the
occurrences are located in the geomorphological units of Massifs of Caparaó I and II,
characterized by an intensely dissected pattern; 61.9% occurred close to a sinistral
transcurrent fault and/or structural lineaments: surface traces S. 61, 9% of the events,
49.7% corresponded to planar landslides and 12.2% corresponded to falling blocks:
rolling . 38.1% of the recorded mass movements did not occur close to lineaments
demarcated in the aforementioned scale. As for hypsometry, it was found that 59.5%
of the events varied at altitudes from 100 to 300m, 14.2% at altitudes from 300 to 500m,
11.9% at altitudes from 500 to 700m and 14.2% of the events varied in altitudes from
700 to 900m. 79% occurred in areas that underwent anthropic modifications, 66.%
were in urban areas, evidencing the lack of territorial planning for occupation and urban
expansion. Therefore, it is necessary to create inventories and mass movements to
ensure registration and updating the processes that occurred in the past and present
in order to collaborate in predicting and mitigating landslides in the future.
