Percorrer por autor "Oliveira, Sérgio"
A mostrar 1 - 10 de 17
Resultados por página
Opções de ordenação
- 2002 - Ano internacional das montanhasPublication . Rodrigues, Luísa; Trindade, Jorge; Oliveira, Sérgio
- Applicaton of Digital Shoreline Analysis System (DSAS) for analyzing sandy coast dynamics in Essaouira, MoroccoPublication . Khouz, Abdellah; Trindade, Jorge; Oliveira, Sérgio; El Bchari, Fatima; 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. The insights gained from our investigation into the sandy coastal system will provide valuable input for making informed decisions regarding territorial management.
- Assessment of landslide susceptibility in the rocky coast subsystem of Essaouira, MoroccoPublication . Oliveira, Sérgio; Khouz, Abdellah; Trindade, Jorge; Elbchari, Fatima; Bougadir, Blaid; Garcia, Ricardo; Jadoud, Mourad
- Assessment of subsidence and collapse hazards using electrical resistivity tomography: case study of Ida Ouazza salt mine, Essaouira province - MoroccoPublication . Khouz, Abdellah; Trindade, Jorge; El Bchari, Fatima; Bougadir, Blaid; Oliveira, Sérgio; Garcia, Ricardo; Ibouh, H.; Jaffal, H.; Ikirri, M.; Laftouhi, N.; Elachgar, H.; Jadoud, Mourad
- Coastal slope instability and susceptibility mappingPublication . Trindade, Jorge; Oliveira, Sérgio; Khouz, Abdellah; Garcia, Ricardo; Ebchari, Fatima; Bougadir, Blaid; Chaibi, Mohamed
- Combining the weights of evidence model, the Strahler/Shreve hydrographic model, and the HEC-RAS analysis for the assessment of flood susceptibility in Essaouira Province, MoroccoPublication . Khouz, Abdellah; Trindade, Jorge; Oliveira, Sérgio; Santos, Pedro; El Bchari, Fatima; Bougadir, Blaid; Garcia, Ricardo; Reis, Eusébio; Jadoud, Mourad; Silva, Andreia
- Contributo de modelos estatísticos na avaliação da suscetibilidade a cheias na província de Essaouira, MarrocosPublication . Khouz, Abdellah; Trindade, Jorge; Santos, Pedro Pinto; El Bchari, Fatima; Oliveira, Sérgio; Garcia, R. A. C.; Asma Bougayou; Ikirri, Mustapha; Mourad Jadoud; Rachidi, Said; Bougadir, BlaidAs inundações são perigos naturais recorrentes nas regiões norte e central de Marrocos, causando perdas significativas. Este estudo desenvolveu um mapa de suscetibilidade a inundações nas bacias hidrográficas da província de Essaouira utilizando três modelos: Processo de Hierarquia Analítica (AHP), Razão de Frequência (FR) e Pesos de Evidência (WoE). Dez fatores condicionantes; declive, altitude, densidade de drenagem, precipitação, litologia e índice de umidade topográfica..., foram integrados num sistema SIG. A precisão dos modelos, avaliada pela área sob a curva (AUC), superou 90%, indicando alta fiabilidade. As zonas mais suscetíveis situam-se perto da cidade de Essaouira e do rio Ksob.
- Delimitação de distritos de solos em Portugal ContinentalPublication . Conceição, Mariana; Batista, Gonçalo Marques ; Garcia, R. A. C.; Oliveira, Sérgio; André Trindade; Viana, Cláudia M. ; Rocha, JorgeA Diretiva de Monitorização do Solo da UE promove a gestão sustentável do solo nos Estados-Membros, propondo Unidades de Solo (US) dentro de Distritos de Solo para monitorização/governação eficazes. A heterogeneidade do solo é abordada com técnicas avançadas, incluindo machine learning, geoestatística e SIG. A metodologia avalia a qualidade do solo utilizando dados climatológicos, do uso/tipo do solo e propriedades do solo, para delinear US. A harmonização dos sistemas de monitorização e a criação de um observatório do solo aumentam a fiabilidade dos dados. O projeto nacional, financiado pela FCT, destaca o envolvimento das partes interessadas e a sustentabilidade agrícola.
- Dinâmicas geomorfológicas. Metodologias. AplicaçãoPublication . Pereira, Ana Ramos; Trindade, Jorge; Garcia, Ricardo; Oliveira, Sérgio
- Flood susceptibility assessment through statistical models and HEC-RAS analysis for sustainable management in essaouira province, MoroccoPublication . Khouz, Abdellah; Trindade, Jorge; Santos, Pedro Pinto; Oliveira, Sérgio; Bchari, Fatima El; Bougadir, Blaid; Garcia, Ricardo; Reis, Eusébio; Jadoud, Mourad; Saouabe, Tarik; Rachidi, SaidFloods 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 called HEC-RAS (version 6.3.1). Our analysis focused on the Essaouira watersheds in Morocco, where we identified around 197 flood locations. Out of these, we randomly selected 70% for modeling purposes while the remaining 30% were used for validation. Ten factors that influence floods were considered, such as slope, elevation, proximity to rivers, drainage density, stream order, land use patterns, rainfall data, lithology (permeability level) index (TWI), and curvature. We obtained these factors from data sources. Finally, we generated a flood susceptibility map and evaluated its accuracy by calculating the area under the curve (AUC). The validation results confirmed that all three models were robust and effective with an AUC of 90. Moreover, the research uncovered a trend of vulnerability with the most susceptible area being in close proximity to the city of Essaouira along the Oued Ksob. A detailed analysis using HEC-RAS was conducted at this identified location, pinpointing the village of Diabat as highly exposed. These findings hold significance for flood management, empowering decision makers, scholars, and urban planners to make informed choices and implement strategies that can minimize the impact of floods in susceptible regions while minimizing potential damages.