11 documents found, page 1 of 2
A centennial catalogue of hydro-geomorphological events and their atmospheric f...
da Silva Pereira, Susana; Ramos, A.M.; Rebelo, L.; Trigo, R.M.; Zêzere, JoséThe DISASTER database records 1969 unique hydro-geomorphologic cases (floods and landslides) that generated human damages in Portugal during a 150 year-period (1865–2015. The main purposes of this work are the following: to present a national disaster events catalogue; to analyse the atmospheric conditions and to discuss the role of rainfall as main driving force of the hydro-geomorphological disaster events. T...
Decennial comparison of changes in social vulnerability: a municipal analysis i...
Tavares, A.O.; Barros, J.L.; Mendes, J.M.; Santos, Pedro Pinto; da Silva Pereira, SusanaThe concept of Social Vulnerability (SV) is characterized and distinguished by its complexity and multidisciplinarity. This concept takes into account the specific characteristics of the individual and his social and economic relations, as well as the physical environment where he is inserted. These differentiating characteristics make Social Vulnerability (SV) an indispensable work tool in the process of chara...
Mapping landslide susceptibility using data-driven methods
Zêzere, José; da Silva Pereira, Susana; Melo, Raquel; Oliveira, Sérgio; Garcia, Ricardo A CMost epistemic uncertainty within data-driven landslide susceptibility assessment results from errors in landslide inventories, difficulty in identifying and mapping landslide causes and decisions related with the modelling procedure. In this work we evaluate and discuss differences observed on landslide susceptibility maps resulting from: (i) the selection of the statistical method; (ii) the selection of the t...
Understanding driving forces and implications associated with the land use and ...
Meneses, Bruno; Reis, Eusébio; da Silva Pereira, Susana; Vale, Maria; Reis, RuiUnderstanding the processes of land use and land cover changes (LUCC) and the associated driving forces is important for achieving sustainable development. This paper presents the LUCC in Portugal at the regional level (NUTS II) from 1995 to 2010 and discusses the main driving forces and implications associated with these LUCC. The main objectives of this work are: (a) to quantify the land use and land cover (L...
Landslide quantitative risk analysis of buildings at the municipal scale based ...
da Silva Pereira, Susana; Garcia, Ricardo A C; Zêzere, José; Oliveira, Sérgio; Silva, MárcioA landslide quantitative risk analysis is applied the municipality of Santa Marta de Penagui~ao (N of Portugal) to evaluate the risk to which the buildings are exposed, using a vector data model in GIS. Two landslide subgroups were considered: landslide subgroup 1 (event inventory of landslides occurred on January 200)1; and landslide subgroup 2 (inventoried landslides occurred after the 2001 event until 2010)....
Assessment of physical vulnerability of buildings and analysis of landslide ris...
Guillard-Gonçalves, C.; Zêzere, José; da Silva Pereira, Susana; Garcia, Ricardo A CThis study offers a semi-quantitative assessment of the physical vulnerability of buildings to landslides in a Portuguese municipality (Loures), as well as the quantitative landslide risk analysis computed as the product of the landslide hazard by the vulnerability and the economic value of the buildings. The hazard was assessed by combining the spatiotemporal probability and the frequency–magnitude relationshi...
The deadliest storm of the 20th century striking Portugal: flood impacts and at...
Trigo, Ricardo M.; Ramos, Catarina; da Silva Pereira, Susana; Ramos, Alexandre M.; Zêzere, José; Liberato, Margarida L.R.The deadliest storm affecting Portugal since, at least, the early 19th century, took place on the 25 and 26 November 1967 causing more than 500 fatalities. This work aims to assess the most relevant aspects of this episode. This includes describing the associated meteorological conditions and key hydrological characterisation such as the level of exceptionality of the observed precipitation at different tempora...
Mortality patterns of hydro-geomorphologic disasters
da Silva Pereira, Susana; Zêzere, José; Quaresma, I.; Santos, P. P.; Santos, M.Social impacts caused by floods and landslides in Portugal in the period of 1865-2010 are gathered in the DISASTER database. This database contains 1,902 hydro-geomorphologic cases that caused 1,248 fatalities (81% and 19% associated with floods and landslides, respectively). The use of the DISASTER database allowed for: (i) the analysis of the frequency and the temporal evolution of fatal floods and landslides...
Spatial impact and triggering conditions of the exceptional hydro-geomorphologi...
da Silva Pereira, Susana; Ramos, A. M.; Zêzere, José; Trigo, R. M.; Vaquero, J. M.According to the DISASTER database the 20–28 December 1909 event was the hydro-geomorphologic event with the highest number of flood and landslide cases that occurred in Portugal in the period 1865–2010 (Zêzere et al., 2014). This event also caused important social impacts over the Spanish territory, especially in the Douro Basin, having triggered the highest floods in more than 100 years at the river's mouth i...
Rainfall thresholds for landslide activity in Portugal: a state of the art
Zêzere, José; Vaz, Teresa; da Silva Pereira, Susana; Oliveira, Sérgio; Marques, R.; Garcia, Ricardo A CRainfall is the most important physical process responsible for the landslide triggering in Portugal. Results obtained worldwide have shown that control of rainfall on landslides differs substantially depending upon landslide depth and kinematics and the affected material. Therefore, the critical rainfall conditions for failure are not the same for different types of landslides, and may be strongly influenced b...