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Rui Lança
Higher Institute of Engineering, University of Algarve, CEPAC/CTA, 8005-139 Faro, Portugal

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Short Biography

Assistant Professor at Universidade do Algarve, Portugal. PhD in Civil Engineering. Develops technical and scientific activity in the domains of sustainability, environment, hydraulic, and water resources. Published more than 50 research articles in scientific journals and congress proceedings.

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Journal article
Published: 28 May 2021 in Sustainability
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The Algarve region, located in the south of Portugal, is a well-known tourism destination that seeks to be sustainable and competitive. The local administration looks to establish a collaborative network, where stakeholders take a crucial role. The research aims to appeal to the accommodations and food services stakeholders to have a shared vision of the issues and priorities related to sustainable tourism development. Their perception is a critical factor in making decisions regarding the region’s competitiveness. Algarve’s two major and leading associations of the tourism supply sector AIHSA and AHETA were invited to participate in the study. Based on the responses of an online questionnaire, an artificial intelligence algorithm was applied to the data to identify the common and divergent aspects. The conceptual model developed is based on a simplified model of psychological ownership. The results highlight a convergent perspective regarding sustainability challenges, namely, natural resources and biodiversity, safety, and supply chain. However, hotels and restaurants do not reflect the same perception regarding sustainability initiatives, e-tourism, or free internet access. These divergences are essential results since they indicated which issues require local authorities’ priority intervention.

ACS Style

Fátima Farinha; David Bienvenido-Huertas; Manuel Duarte Pinheiro; Elisa Silva; Rui Lança; Miguel José Oliveira; Ricardo Batista. Sustainable Competitiveness of Tourism in the Algarve Region. Critical Stakeholders’ Perception of the Supply Sector. Sustainability 2021, 13, 6072 .

AMA Style

Fátima Farinha, David Bienvenido-Huertas, Manuel Duarte Pinheiro, Elisa Silva, Rui Lança, Miguel José Oliveira, Ricardo Batista. Sustainable Competitiveness of Tourism in the Algarve Region. Critical Stakeholders’ Perception of the Supply Sector. Sustainability. 2021; 13 (11):6072.

Chicago/Turabian Style

Fátima Farinha; David Bienvenido-Huertas; Manuel Duarte Pinheiro; Elisa Silva; Rui Lança; Miguel José Oliveira; Ricardo Batista. 2021. "Sustainable Competitiveness of Tourism in the Algarve Region. Critical Stakeholders’ Perception of the Supply Sector." Sustainability 13, no. 11: 6072.

Journal article
Published: 05 August 2020 in Sustainable Cities and Society
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The monitoring of sustainability indicators allows behavioural tendencies of a region to be controlled, so that adequate policies could be established in advance for a sustainable development. However, some data could be missed in the monitoring of these indicators, thus making the establishment of sustainability policies difficult. This paper therefore analyses the possibility to forecast the sustainability indicators of a region by using four different artificial intelligent algorithms: linear regression, multilayer perceptron, random forest, and M5P. The study area selected was the Algarve region in Portugal, and 180 monitored indicators were analysed between 2011 and 2017. The results showed that M5P is the most appropriate algorithm to estimate sustainability indicators. M5P was the algorithm obtaining the best estimations in a greater number of indicators. Nevertheless, the results showed that MP5 was not the best option for all indicators, since in some of them, the use of other algorithms obtained better results, thus reflecting the need of an individual previous study of each indicator. With these algorithms, it is possible for public bodies and institutions to evaluate the sustainable development of the region and to have reliable information to take corrective measures when needed, thus contributing to a more sustainable future.

ACS Style

David Bienvenido-Huertas; Fátima Farinha; Miguel José Oliveira; Elisa M.J. Silva; Rui Lança. Comparison of artificial intelligence algorithms to estimate sustainability indicators. Sustainable Cities and Society 2020, 63, 102430 .

AMA Style

David Bienvenido-Huertas, Fátima Farinha, Miguel José Oliveira, Elisa M.J. Silva, Rui Lança. Comparison of artificial intelligence algorithms to estimate sustainability indicators. Sustainable Cities and Society. 2020; 63 ():102430.

Chicago/Turabian Style

David Bienvenido-Huertas; Fátima Farinha; Miguel José Oliveira; Elisa M.J. Silva; Rui Lança. 2020. "Comparison of artificial intelligence algorithms to estimate sustainability indicators." Sustainable Cities and Society 63, no. : 102430.

Journal article
Published: 18 February 2020 in Sustainability
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This study analyses the most appropriate methodology to make similarity classifications among the cities of the Algarve (Portugal) according to 105 sustainability indicators monitored with the Observatory of Sustainability of the Algarve Region for Tourism (OBSERVE). The methodology used to establish the similarities was the cluster analysis with 4 different approaches which reduced the dimensions of the data set: total approach, pillar approach, subject area approach, and indicator approach. By combining the approaches, a total of 620 different cluster analyses were performed. The results reflected that the data analysis approaches with less dimensions were those that performed the best groups among cities. In this sense, the approaches with a high number of indicators (e.g., the total or the pillar approach) were characterised by misclassifying cities in more than 30% of the indicators. Thus, the most acceptable cluster analysis approach was that with a low number of indicators. Through this approach, it was possible to make correct groups of the sustainability level of the cities of the Algarve. These results provided an appropriate methodology for the decision-making regarding the sustainability of a region and could be extrapolated to other regions to assess sustainability or environmental indicators.

ACS Style

David Bienvenido-Huertas; Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança. Challenge for Planning by Using Cluster Methodology: The Case Study of the Algarve Region. Sustainability 2020, 12, 1536 .

AMA Style

David Bienvenido-Huertas, Fátima Farinha, Miguel José Oliveira, Elisa M. J. Silva, Rui Lança. Challenge for Planning by Using Cluster Methodology: The Case Study of the Algarve Region. Sustainability. 2020; 12 (4):1536.

Chicago/Turabian Style

David Bienvenido-Huertas; Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança. 2020. "Challenge for Planning by Using Cluster Methodology: The Case Study of the Algarve Region." Sustainability 12, no. 4: 1536.

Journal article
Published: 05 January 2020 in AgriEngineering
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There has been increasing pressure on water resources in cities due to the proliferation of urban green areas. In the Mediterranean climate, only a small part of the plants’ water needs is supplied by rainfall during the winter months. Thus, in Algarve (Portugal) irrigation of the urban landscapes is required almost all year round. The aims of this study were to evaluate the maintenance of the urban landscapes of São Brás de Alportel (Algarve) during a year, based on the characterization of the vegetation of the urban gardens, the climate data, the analysis of the irrigation systems, the calculation of the plants water requirements and the normalized difference vegetation index (NDVI). By crossing all this information, it was possible to understand if the current maintenance level is the most suitable for sustainable irrigated urban landscapes. In most of the gardens, it was possible to establish a relationship between the gross irrigation water requirements and NDVI. In general, the NDVI allowed us to study the urban landscape, through the monthly observation of the differences in the appearance and development of the vegetation.

ACS Style

Celestina M. G. Pedras; Helena Maria Fernandez; Rui Lança; Fernando Granja-Martins. Applying Remote Sensing Technologies in Urban Landscapes of the Mediterranean. AgriEngineering 2020, 2, 27 -36.

AMA Style

Celestina M. G. Pedras, Helena Maria Fernandez, Rui Lança, Fernando Granja-Martins. Applying Remote Sensing Technologies in Urban Landscapes of the Mediterranean. AgriEngineering. 2020; 2 (1):27-36.

Chicago/Turabian Style

Celestina M. G. Pedras; Helena Maria Fernandez; Rui Lança; Fernando Granja-Martins. 2020. "Applying Remote Sensing Technologies in Urban Landscapes of the Mediterranean." AgriEngineering 2, no. 1: 27-36.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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The University of Algarve, in consortium with Saint-Gobain Weber Portugal and Cristal Construction- Materials and Civil Construction Works, is developing a new concept of sustainable swimming pool (SPOOLs – sustainable pools project), more environmentally friendly, increasing energy efficient and reducing maintenance costs. The Algarve is a popular touristic destination in Portugal and in Europe. It receives millions of international and national tourists annually. Algarve is known by its warm and sunny climate and the people appreciate the houses and hotels with swimming pools, preferably surrounded by grass and trees and thus providing a pleasant green ambience. The construction, installation and maintenance of swimming pools is relatively recent, existing in large scale only in the last 50 years. During this period, the construction technologies evolved significantly and nowadays there are different solutions. Most of the existing swimming pools in Algarve, correspond to small swimming pools, built in residential areas and therefore in most cases there is no available data about the design and technical specifications. Within the scope of the I&DT project SPOOLs, an online questionnaire about the typology and durability of swimming pools in the Algarve was elaborated, for which more than 100 responses were obtained. From the analysis of the results it is possible to make several considerations about the durability and construction pathologies. The results hereby presented validate the conclusions, regarding the major swimming pools pathologies, as well as their sustainability.

ACS Style

Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Alfredo Braga; Manuela Silva; Armando Inverno; Paulo Cabral; Francisco Do Carmo; Luís Silva; Pedro Sequeira. Common Typology, Durability and Pathologies of the Swimming Pools in the Algarve Region - Implications in the Sustainability. INCREaSE 2019 2019, 893 -902.

AMA Style

Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Rui Lança, Alfredo Braga, Manuela Silva, Armando Inverno, Paulo Cabral, Francisco Do Carmo, Luís Silva, Pedro Sequeira. Common Typology, Durability and Pathologies of the Swimming Pools in the Algarve Region - Implications in the Sustainability. INCREaSE 2019. 2019; ():893-902.

Chicago/Turabian Style

Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Alfredo Braga; Manuela Silva; Armando Inverno; Paulo Cabral; Francisco Do Carmo; Luís Silva; Pedro Sequeira. 2019. "Common Typology, Durability and Pathologies of the Swimming Pools in the Algarve Region - Implications in the Sustainability." INCREaSE 2019 , no. : 893-902.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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Construction and demolition wastes (C&DW) are often deposited in landfills and dumpsters in urban perimeters, causing weighty environmental and social impacts. The reuse of C&DW in innovative concrete formulations is a good solution for both problems. Recycled aggregates (RA), prepared from C&DW, generally show lower quality properties than natural aggregates. This reuse has been extensively studied mainly in conventional concrete, although there are few studies regarding the incorporation of RA into the sprayed concrete and the information is almost non-existent. The use of sprayed concrete is a flexible, economical and fast construction method, but it requires specialized skilled workers and a high degree of mechanization. It is fairly common to use this technique in new construction structures such as vaults, tunnels, canals, reservoirs, swimming pools and sewers. In Algarve, sprayed concrete is used in the construction of more than 70% of all swimming pools. Under the project SPOOLs – sustainable pools, whose objective is to develop more sustainable pools, it was developed a composition of sprayed concrete that incorporates RA. This paper presents the results of strength and durability from several mixtures of hardened concrete and the prescription of the optimized composition, regarding the existing regulations. At the same time, there were also assessed the consequences upon the quality of the sprayed concrete when the operator, through the dry projection method, adds different amounts of water. Significant environmental savings would be gained if part of the required materials for this production, would be replaced by recycled material, such as RA.

ACS Style

Alfredo Braga; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Paulo Cabral; Francisco Do Carmo. Sprayed Concrete with Recycled Aggregates for Swimming Pools Structures. INCREaSE 2019 2019, 815 -825.

AMA Style

Alfredo Braga, Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Rui Lança, Paulo Cabral, Francisco Do Carmo. Sprayed Concrete with Recycled Aggregates for Swimming Pools Structures. INCREaSE 2019. 2019; ():815-825.

Chicago/Turabian Style

Alfredo Braga; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Paulo Cabral; Francisco Do Carmo. 2019. "Sprayed Concrete with Recycled Aggregates for Swimming Pools Structures." INCREaSE 2019 , no. : 815-825.

Journal article
Published: 16 January 2019 in Sustainability
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The selection of indicators for the Observatory of Sustainability of the Algarve Region for Tourism (OBSERVE), poses challenges, namely which indicators are relevant to stakeholders and how to assure that information is available. To support the selection of the environmental, sociocultural, economic and institutional indicators, an engagement process was designed and applied, which included meetings with stakeholders, a workshop and an online survey. The results showed that both workshop and online surveys reflected, in general, similar opinions, thus allowing the selecting of the sustainable development indicators for the Algarve region. Additionally, the results showed that nearly 75% of the indicators can be obtained from national statistics and, therefore, can be used on the OBSERVE project, assuring a quick flow of information. As limitations, it is important to mention that the other 25% will need further development, in order to provide data for indicators, like carbon management and client satisfaction. With this approach, the observatory will survey and evaluate the sustainable development of the region (status and trends), based on indicators that answer to the strategic needs of system’s main users, with social and economic implications, i.e., public institutions, economic agents, tourists, local communities and residents.

ACS Style

Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança; Manuel Duarte Pinheiro; Cátia Miguel. Selection Process of Sustainable Indicators for the Algarve Region—OBSERVE Project. Sustainability 2019, 11, 444 .

AMA Style

Fátima Farinha, Miguel José Oliveira, Elisa M. J. Silva, Rui Lança, Manuel Duarte Pinheiro, Cátia Miguel. Selection Process of Sustainable Indicators for the Algarve Region—OBSERVE Project. Sustainability. 2019; 11 (2):444.

Chicago/Turabian Style

Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança; Manuel Duarte Pinheiro; Cátia Miguel. 2019. "Selection Process of Sustainable Indicators for the Algarve Region—OBSERVE Project." Sustainability 11, no. 2: 444.

Conference paper
Published: 01 January 2019 in Congreso Ibérico de Agroingeniería
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ACS Style

Celestina Pedras; Helena M Fernandez; Rui Lança; Fernando Miguel Granja Martins. Deteção remota aplicada aos espaços verdes urbanos do Mediterrâneo. Congreso Ibérico de Agroingeniería 2019, 1 .

AMA Style

Celestina Pedras, Helena M Fernandez, Rui Lança, Fernando Miguel Granja Martins. Deteção remota aplicada aos espaços verdes urbanos do Mediterrâneo. Congreso Ibérico de Agroingeniería. 2019; ():1.

Chicago/Turabian Style

Celestina Pedras; Helena M Fernandez; Rui Lança; Fernando Miguel Granja Martins. 2019. "Deteção remota aplicada aos espaços verdes urbanos do Mediterrâneo." Congreso Ibérico de Agroingeniería , no. : 1.

Proceedings article
Published: 04 September 2018 in Sustainable Development and Planning X
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ACS Style

Miguel José Oliveira; Alfredo Braga; Armando Inverno; Carlos Santos; Elisa M. J. Da Silva; Francisco Do Carmo; Luís Silva; Manuela Moreira Da Silva; Paulo Cabral; Pedro Sequeira; Rui Lança. SPOOLS: SUSTAINABLE POOLS – MAIN DEVELOPMENTS OF THE PROJECT. Sustainable Development and Planning X 2018, 1 .

AMA Style

Miguel José Oliveira, Alfredo Braga, Armando Inverno, Carlos Santos, Elisa M. J. Da Silva, Francisco Do Carmo, Luís Silva, Manuela Moreira Da Silva, Paulo Cabral, Pedro Sequeira, Rui Lança. SPOOLS: SUSTAINABLE POOLS – MAIN DEVELOPMENTS OF THE PROJECT. Sustainable Development and Planning X. 2018; ():1.

Chicago/Turabian Style

Miguel José Oliveira; Alfredo Braga; Armando Inverno; Carlos Santos; Elisa M. J. Da Silva; Francisco Do Carmo; Luís Silva; Manuela Moreira Da Silva; Paulo Cabral; Pedro Sequeira; Rui Lança. 2018. "SPOOLS: SUSTAINABLE POOLS – MAIN DEVELOPMENTS OF THE PROJECT." Sustainable Development and Planning X , no. : 1.

Journal article
Published: 30 March 2017 in Territorium
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O objetivo deste trabalho foi estudar o impacto da carga de combustível nas propriedades hidrológicas de um solo franco arenoso, queimado em condições de laboratório. Para tal, foram recolhidas e transportadas paralaboratório, amostras de solo não perturbado, onde foram queimadas depois de aplicar diferentes cargas de material combustível (agulhas de pinheiro). A taxa de infiltração e a sorvidade do solo diminuem fortemente com o aumento da carga de combustível. https://doi.org/10.14195/1647-7723_24_15

ACS Style

Soraia Almeida; Helena M Fernandez; Fernando Miguel Granja Martins; Celestina Pedras; Rui Lança. Impacto da carga combustível nas propriedades hidráulicas de um solo pós-incêndio em condições laboratoriais. Territorium 2017, 213 -219.

AMA Style

Soraia Almeida, Helena M Fernandez, Fernando Miguel Granja Martins, Celestina Pedras, Rui Lança. Impacto da carga combustível nas propriedades hidráulicas de um solo pós-incêndio em condições laboratoriais. Territorium. 2017; (24):213-219.

Chicago/Turabian Style

Soraia Almeida; Helena M Fernandez; Fernando Miguel Granja Martins; Celestina Pedras; Rui Lança. 2017. "Impacto da carga combustível nas propriedades hidráulicas de um solo pós-incêndio em condições laboratoriais." Territorium , no. 24: 213-219.

Journal article
Published: 03 November 2016 in Territorium
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O uso e a ocupação do solo, e os incêndios florestais influenciam a relação entre precipitação-escoamento superficial e, consequentemente, o regime de cheias num curso de água. Neste estudo utilizou-se o modelo Hydrologic Engineering Center - Hydrologic Modeling System para simular a resposta hidrológica da bacia hidrográfica do Rio Séqua, em cenário pré-incêndio e pós-incêndio de Catraia, Algarve, Portugal. Os resultados revelam que os caudais de ponta de cheia sofrem um incremento de 25% nas sub-bacias hidrográficas mais afetadas pelo incêndio.

ACS Style

Soraia Almeida; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Elisa Maria De Jesus Da Silva; Rui Graça-E-Costa; Rui Lança. Efeito do incêndio de Catraia no comportamento hidrológico da bacia hidrográfica do rio Séqua. Territorium 2016, 153 -160.

AMA Style

Soraia Almeida, Fernando Miguel Granja Martins, Helena M Fernandez, Celestina Pedras, Elisa Maria De Jesus Da Silva, Rui Graça-E-Costa, Rui Lança. Efeito do incêndio de Catraia no comportamento hidrológico da bacia hidrográfica do rio Séqua. Territorium. 2016; (23):153-160.

Chicago/Turabian Style

Soraia Almeida; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Elisa Maria De Jesus Da Silva; Rui Graça-E-Costa; Rui Lança. 2016. "Efeito do incêndio de Catraia no comportamento hidrológico da bacia hidrográfica do rio Séqua." Territorium , no. 23: 153-160.

Journal article
Published: 01 September 2016 in International Journal of Sediment Research
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The equilibrium scour depth at uniform single bridge piers depends on a large number of variables, including the pier horizontal cross-section shape and its alignment angle towards the flow direction. The influence of these variables has been studied by only a few researchers, mostly, on the basis of tests that were far from approaching equilibrium.This experimental study aims at revisiting the influence of piers’ shape and alignment on local scouring for length-width ratios smaller than or equal to 4, by increasing the experimental evidence. Fifty five long-duration laboratory tests were run under steady, clear-water flow, close to the threshold for initiation of sediment motion. Five pier shapes were considered: circular, rectangular square-nosed, rectangular round-nosed, oblong, and zero-spacing (packed) pile-groups; the tested skew-angles were 0, 30, 45, 60, and 90°. It was concluded that i) the shape factor can be taken as 1.0, for rectangular round-nosed and oblong cross-section piers, and as 1.2, for rectangular square-nosed and packed pile-group cross-section piers, ii) the shape factor does not vary significantly with the duration of tests, this way confirming the robustness of the shape factors reported to date, iii) the effect of shape is present at skewed piers although the associated coefficients remain in the narrow range of 1.0 to 1.2, and iv) for length-width ratios smaller than 4, the shape factor is of the same order of magnitude as the skew angle factor and should not be neglected.

ACS Style

Cristina Fael; Rui Lança; António Cardoso. Effect of pier shape and pier alignment on the equilibrium scour depth at single piers. International Journal of Sediment Research 2016, 31, 244 -250.

AMA Style

Cristina Fael, Rui Lança, António Cardoso. Effect of pier shape and pier alignment on the equilibrium scour depth at single piers. International Journal of Sediment Research. 2016; 31 (3):244-250.

Chicago/Turabian Style

Cristina Fael; Rui Lança; António Cardoso. 2016. "Effect of pier shape and pier alignment on the equilibrium scour depth at single piers." International Journal of Sediment Research 31, no. 3: 244-250.

Journal article
Published: 01 March 2016 in Journal of Hydraulic Engineering
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Most studies on scouring seem to have overlooked the effect of viscosity, the assumption being that the flow is free of viscous effects inside the scour hole because of the presence of highly turbulent flow structures such as down-flow, horseshoe vortex, and wake vortices irrespective of the approach flow regime. The present work reports the results of experiments conceived to revisit the effect of viscosity on scouring. The experiments were performed by changing the Reynolds-like numbers for two flow shallowness values and keeping constant the remaining dimensionless parameters that control the scour process. The values of the Reynolds number corresponded to transitional approach flows. The experimental results indicate that scouring does depend on viscosity in usual laboratory conditions, the viscous effect leading to scour depths in the safety side.

ACS Style

Rui M. M. Lança; Gonzalo Simarro; Cristina M. S. Fael; António Heleno Cardoso. Effect of Viscosity on the Equilibrium Scour Depth at Single Cylindrical Piers. Journal of Hydraulic Engineering 2016, 142, 06015022 .

AMA Style

Rui M. M. Lança, Gonzalo Simarro, Cristina M. S. Fael, António Heleno Cardoso. Effect of Viscosity on the Equilibrium Scour Depth at Single Cylindrical Piers. Journal of Hydraulic Engineering. 2016; 142 (3):06015022.

Chicago/Turabian Style

Rui M. M. Lança; Gonzalo Simarro; Cristina M. S. Fael; António Heleno Cardoso. 2016. "Effect of Viscosity on the Equilibrium Scour Depth at Single Cylindrical Piers." Journal of Hydraulic Engineering 142, no. 3: 06015022.

Book chapter
Published: 22 December 2014 in Multidimensão e territórios de risco
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ACS Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Luciano Lourenço. Caracterização e medidas mitigadoras das inundações em Vilamoura, Algarve. Multidimensão e territórios de risco 2014, 327 -332.

AMA Style

Rui Lança, Vera Rocheta, Fernando Miguel Granja Martins, Helena M Fernandez, Celestina Pedras, Luciano Lourenço. Caracterização e medidas mitigadoras das inundações em Vilamoura, Algarve. Multidimensão e territórios de risco. 2014; ():327-332.

Chicago/Turabian Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Luciano Lourenço. 2014. "Caracterização e medidas mitigadoras das inundações em Vilamoura, Algarve." Multidimensão e territórios de risco , no. : 327-332.

Book chapter
Published: 21 December 2014 in Multidimensão e territórios de risco
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ACS Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Elisa Maria De Jesus Da Silva; Celestina Pedras; Luciano Lourenço. Modificação das propriedades hidráulicas dos solos da Serra algarvia devido aos incêndios florestais. Multidimensão e territórios de risco 2014, 715 -719.

AMA Style

Rui Lança, Vera Rocheta, Fernando Miguel Granja Martins, Helena M Fernandez, Elisa Maria De Jesus Da Silva, Celestina Pedras, Luciano Lourenço. Modificação das propriedades hidráulicas dos solos da Serra algarvia devido aos incêndios florestais. Multidimensão e territórios de risco. 2014; ():715-719.

Chicago/Turabian Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Elisa Maria De Jesus Da Silva; Celestina Pedras; Luciano Lourenço. 2014. "Modificação das propriedades hidráulicas dos solos da Serra algarvia devido aos incêndios florestais." Multidimensão e territórios de risco , no. : 715-719.

Journal article
Published: 01 November 2013 in Journal of Hydraulic Engineering
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New long-duration clear-water scour data were collected at single cylindrical piers with the objective of investigating the effect of sediment coarseness, Dp/D50 (Dp = pier diameter; D50 = median grain size) on the equilibrium scour depth and improving the scour depth time evolution modeling by making use of the exponential function suggested in the literature. Experiments were carried out for the flow intensity close to the threshold condition of initiation of sediment motion, imposing wide changes of sediment coarseness and flow shallowness, d/Dp (d = approach flow depth). The effect of sediment coarseness on the equilibrium scour depth was identified; existing predictors were modified to incorporate this effect for U/Uc≈1.0; Dp/D50>≈60 and d/Dp≥0.5; the complete characterization of a known scour depth time evolution model was achieved for U/Uc≈1.0, 60

ACS Style

Rui Lança; Cristina Maria Sena Fael; Rodrigo J. Maia; João Pedro Pêgo; António Heleno Cardoso. Clear-Water Scour at Comparatively Large Cylindrical Piers. Journal of Hydraulic Engineering 2013, 139, 1117 -1125.

AMA Style

Rui Lança, Cristina Maria Sena Fael, Rodrigo J. Maia, João Pedro Pêgo, António Heleno Cardoso. Clear-Water Scour at Comparatively Large Cylindrical Piers. Journal of Hydraulic Engineering. 2013; 139 (11):1117-1125.

Chicago/Turabian Style

Rui Lança; Cristina Maria Sena Fael; Rodrigo J. Maia; João Pedro Pêgo; António Heleno Cardoso. 2013. "Clear-Water Scour at Comparatively Large Cylindrical Piers." Journal of Hydraulic Engineering 139, no. 11: 1117-1125.

Journal article
Published: 01 October 2013 in Journal of Hydraulic Engineering
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Groups of piles are frequently used as bridge foundations. Different group configurations, characterized by different pile spacing, skew-angle, number, and arrangement of pile group columns interact differently with the flow field and lead to different scour patterns and equilibrium scour depth. There have been a number of past studies on the characterization of scouring at pile groups, but most of them report short duration scour experiments. A priori, such short durations may be postulated to inherently carry important uncertainties into existing scour predictors. In this study, 75 long-duration laboratory tests were run under steady, clear-water flow close to the threshold for initiation of sediment motion, to address the effect of time, pile spacing, skew-angle and number of pile group columns on the equilibrium scour depth. Pile groups consisted of matrical arrangements of one, two, or three columns of four rows, with spacings of 1, 2, 3, 4.5, and 6 pile diameters; the tested skew-angles were 0, 15, 30, 45, and 90°. Important contributions were achieved on (1) the impact of the duration of tests on the shape of the scour hole as well as on the precision of coefficients involved in current predictors, (2) the most unfavorable skew angle, (3) the behavior of collapsed pile groups, (4) the maximum scour depth at pile groups composed of a single alignment, and (5) the performance of two current predictors of scour depth at pile groups. Two formulations of a predictor for the calculation of an aggregated pile group factor are suggested.

ACS Style

Rui Lança; Cristina M S Fael; Rodrigo Maia; Joao Pedro Pego; António H. Cardoso. Clear-Water Scour at Pile Groups. Journal of Hydraulic Engineering 2013, 139, 1089 -1098.

AMA Style

Rui Lança, Cristina M S Fael, Rodrigo Maia, Joao Pedro Pego, António H. Cardoso. Clear-Water Scour at Pile Groups. Journal of Hydraulic Engineering. 2013; 139 (10):1089-1098.

Chicago/Turabian Style

Rui Lança; Cristina M S Fael; Rodrigo Maia; Joao Pedro Pego; António H. Cardoso. 2013. "Clear-Water Scour at Pile Groups." Journal of Hydraulic Engineering 139, no. 10: 1089-1098.