130 documents found, page 1 of 13
Physically-based modelling of shallow slides susceptibility at the basin scale ...
Melo, Raquel; Oliveira, Sérgio; Marques, Fernando; Garcia, Ricardo; Zêzere, JoséData-driven methods are the most common approach for assessing shallow slides susceptibility. However, several studies have shown that physically-based models produce better results when incomplete landslide inventories are used. Despite this, physically-based modelling is seldom applied to large areas due to the difficulty in obtaining the required input data. In this study, conducted in the region north of Li...
Delimitation of Soil Districts in mainland Portugal
Conceição, Mariana; Batista, Gonçalo; Garcia, Ricardo; Oliveira, Sérgio; Trindade, André; Viana, Cláudia M.; Rocha, JorgeProposal for a directive on Soil Monitoring and Resilience (Soil Monitoring Law) by the European Union Delineation of Soil Districts - Its concept and importance The use of GIS tools - Machine learning algorithms, Statistical approaches and Cluster analysis Harmonization of monitoring systems at the national level (Portugal)
On the seismic vulnerability assessment of urban areas using census data: the L...
Xofi, Maria; Ferreira, Tiago Miguel; Domingues, José Carlos; Santos, Pedro Pinto; Pereira, Susana; Oliveira, Sérgio; Reis, Eusébio; Zêzere, JoséThis paper presents a procedure for the application of an index-based vulnerability assessment method to the seismic risk assessment of 292,978 reinforced concrete and 152,916 unreinforced masonry buildings in the Lisbon Metropolitan Area (LMA). A singular innovation of this proposed methodology is that it is tailored to be fed with data from the 2011 national population and housing Census. The vulnerability re...
Temporal clustering of precipitation for detection of potential landslides
Banfi, Fabiola; Bevacqua, Emanuele; Rivoire, Pauline; Oliveira, Sérgio; Pinto, Joaquim G.; Ramos, Alexandre M.; Michele, Carlo deLandslides are complex phenomena that cause important impacts in vulnerable areas, including the destruction of infrastructure, environmental damage, and loss of life. The occurrence of landslide events is often triggered by rainfall episodes, single and intense ones or multiple ones occurring in sequence, i.e., clustered in time. Landslide prediction is typically obtained via process-based or empirical thresho...
Landslide susceptibility assessment using different rainfall event-based landsl...
Oliveira, Sérgio; Zêzere, José; Garcia, Ricardo; Pereira, Susana; Vaz, Teresa; Melo, RaquelThe present work aims to evaluate potential sources of uncertainty associated with rainfalltriggered event-based landslide inventories within the framework of landslide susceptibility assessment. Therefore, this study addresses the following questions: (i) How representative is an event-based landslide inventory map of the total landslide activity and distribution in a study area?; (ii) How reliable is an event...
Post-fire debris flow hazard in the Zêzere glacial valley and Manteigas village...
Melo, Raquel; Zêzere, José; Oliveira, Sérgio; Cezar, Lucas; Castro, Emanuel; Vieira, GonçaloA debris flow is a mixture of water and sediments that flows down channelized steep slopes, posing a potential hazard in mountainous regions due to high velocities (from very rapid to extremely rapid), high impact forces and extended run-out distances. The initiation of debris flows is generally attributed to the critical combination of three factors: steep slopes, unconsolidated sediments and water. Heavy rain...
Applicaton of Digital Shoreline Analysis System (DSAS) for analyzing sandy coas...
Khouz, Abdellah; Trindade, Jorge; Oliveira, Sérgio; El Bchari, F.; Bougadir, BlaidCoastlines change research plays a crucial role in understanding the evolution and ensuring effective risk management. This is essential for minimizing impacts on the environment and society. Our study aims to assess the coastal dynamics of sandy systems in Essaouira. By employing advanced techniques such as DSAS and GIS, we aim to analyze shoreline changes, erosion rates, and susceptibility to sand movement. T...
Stimulating critical thinking through report peer-review in a project-based lea...
Alves, Anabela Carvalho; Leão, Celina Pinto; Abreu, Maria Florentina Queirós Silva; Pimentel, Carina Maria Oliveira; Malheiro, M. TeresaProject-based learning (PBL) is an active learning methodology proposed in the early 20th century. Nevertheless, it continues to be a very suitable methodology for the current generation of students. Probably, it is more relevant now than before, since recent generations are more motivated by these learning methodologies. This is due to the fact that today’s students are totally absorbed by technologies that, i...
Multi-scale residential fire susceptibility in the Lisbon Metropolitan Area
Pais, Carolina; Pereira, Susana; Oliveira, SérgioUrban fires are one the major threats to the security of the urban population. Given their spatial context, they have a direct impact on the economy, inhabitants, and destruction of property and heritage in the community. In the Lisbon metropolitan area (LMA), almost 75% of the urban fires occurred in residential buildings between 2006 and 2020 and were recorded with 150 deaths and 275 severely injured victims....
Flood susceptibility assessment through statistical models and HEC-RAS analysis...
Khouz, Abdellah; Trindade, Jorge; Santos, Pedro Pinto; Oliveira, Sérgio; El Bchari, Fatima; Bougadir, Blaid; Garcia, Ricardo; Reis, EusébioFloods are natural disasters that often impact communities living in low-lying areas in the northern and central parts of Morocco. In this study, our aim was to create a flood susceptibility map using three methods; the hierarchy process (AHP) frequency ratio model (FR) and the weights of evidence (WoE) model. We extensively examined the area identified by these approaches using a hydraulic analysis software ca...