Abstract
This research study was developed in the Ribeirão dos Macacos basin at the district of Nova Lima, Minas Gerais state, Brazil. The information value statistical method was applied in the construction of the landslide susceptibility map at the 1:25,000 scale. Different partitions of the inventory were tested, as well as different landslide predisposing factors. In the construction of the landslide inventory, the south, southeast and south-west slopes generally present a higher quality in aerial / orbital images due to the position of the sun (lighting direction), which emphasizes the surface structures and it may omit old landslides on slopes facing north, northeast, and northwest. This condition can generate misleading models when using the slope aspect. Another verification was that the models with better Area Under the Curve index will not always restrict the high susceptibility class in smaller areas. This incongruence occurs due to the different curve conformations, since a smaller index curve can present more restrictive results than a larger index curve. The results showed that the model has a high capacity of adjustment to the input data and high landslide predictive capacity.
Highlights
The expansion process of Brazilian urban centers in recent decades has brought along with it an intense urbanization of areas with greater susceptibility to landslides
The Ribeirão dos Macacos basin is located in the central region of Nova Lima, Minas Gerais, Brazil (Figure 1)
It has an area of 131 km2 and altitudes ranging from 730m to 1540m. This region is marked by conflict of interest among environmental issues, since it constitutes one of the main water sources of the Metropolitan Region of Belo Horizonte, which is the capital of Minas Gerais State, while at the same time, it has an expressive concentration of mining activities (Davis et al 2005)
Summary
The expansion process of Brazilian urban centers in recent decades has brought along with it an intense urbanization of areas with greater susceptibility to landslides. The most common natural disasters in Brazil are generally associated with periods of intense and prolonged rainfall (Tominaga et al 2009). According to the CENAD records – the National Center for Risk and Disaster Management, in the southeast region, where the study area is located, has been the most affected by landslides in the year 2013 (Brazil 2014). Still, according to CRED (2016), between 2006 and 2015, the average death toll was 540 people per year related to this type of disaster in South America. A reflection on the importance attributed to this type of disaster are initiatives seeking to increase knowledge and implement policies that reduce the risks to which society is exposed. We can mention the Hyogo Frame Work for Action 2005 - 2015, promoted
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
