Artigos de Revista

In Portugal, conservation and rehabilitation interventions on monuments (churches, convents, palaces and fortresses), as well as on historical centres (dwelling buildings), have been assuming increasing relevance. To guarantee the present requirements of habitability and aesthetic appearance without descharacterization, in conservation interventions it is necessary to implement wall covering solutions compatible with the background and the preexisting materials. In this work, the application to a case study of a diagnosis methodology for the definition of the probable causes of the anomalies and for the evaluation of the state of conservation of the renders is described. The measures adopted for the repair of the anomalies are referred, through the control of the causes and minimization of their effects.

The combined use of several geological, geochemical andgeophysical observations during six years enabled the detection of a very fainthalo of chemical contamination induced by the operation of a young wastedisposal facility in Northern Portugal. The halo does not classify as pollutionby any standards, but is observed to be intensifying and thus signals a potentialhazardous situation in future years. The approach used shows that acomprehensive and diverse monitoring programme, although relativelyinexpensive and easy to carry out, may detect concealed leaks long before anyenvironmental concern is justified, and thus may help avert future complexremediation needs caused by the uncontrolled growth of undetectedunderground pollution plumes.

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The 2D horizontal morphodynamic modeling system MORSYS2D simulates bottom topography evolution in coastal zones. Sand fluxes are computed with different practical formulas, either for current dominated (e.g, Ackers & White, van Rijn) or combined wave-current flows (e.g., Soulsby van Rijn). Although sensitivity analyses of bottom topography changes in terms of the transport formulas used have already been done, a comparison of the sediment fluxes computed with the different formulations, considering the same flow conditions and using the parameterizations considered in the model (e.g, bottom roughness, bottom stress) is lacking. With that purpose, we have conceptualized a suitable range of wave and current conditions above a sand bed composed of uniform sediment that is characteristic of the conditions encountered in estuaries, tidal inlets and continental shelves, and applied the several flux formulations. To assess the differences obtained, the average value and the standard deviation were computed for each flow condition. This exercise enabled us to identify, for different parameter ranges, the transport formulations which are consistent with one another and those that deviate the most from the mean. This information is useful in practical applications by defining conditions for optimal formula performance.

O presente trabalho introduz sumariamente os conceitos básicos da teoria da decisão estatística

Urban water infrastructures provide essential services to modern societiesand represent a major portion of the value of municipal physical assets.Managing these assets rationally is therefore fundamental for thesustainability of the services and for the economy of societies.

Large civil engineering structures are continuously monitored to assure their structural safety. The Portuguese National Laboratory for Civil Engineering currently monitors several types of structures, likeconcrete dams, bridges or other transportation infrastructures. The consequences of a structural failure are potentially catastrophic, varying from lossof life or environmental damage to high economic impacts. The management and preservation of structural monitoring data is crucial to support decisions concerning the structural safety. However, preserving data also entails several risks and threats

Talvez devido ao facto da madeira ser um produtonatural, susceptível de uso com um mínimode transformação, ela é frequentementeassociada à imagem de material tradicional ealvo de reduzida inovação.No entanto, a madeira e os produtos derivadosapresentam-se-nos hoje numa multiplicidadede formas, texturas, cores e até cheiros,propriedades e utilizações. Transformada oucombinada com outros materiais, naturaisou sintéticos, a madeira permite a criaçãode compósitos inovadores, usados principalmentena indústria da construção, mobiliário,acessórios e decoração.

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This paper presents the results of the study performed for estimating the run-up and flood levelsin a stretch of Vale do Lobo beach, located at Loulé Municipality, in the Algarve region.The study started by defining the offshore wave conditions in the area, based upon data collectedduring 1991 by the Portuguese Hydrographic Institute with a directional wave-buoy located atFaro. These conditions were then transferred to the vicinity of Vale do Lobo beach by using theGUIOMAR system, namely its SWAN module. GUIOMAR is an integrated system for modellingwave propagation in coastal engineering studies. It is currently being developed to providesupport for a sustainable planning and management of the costal area.Two empirical formulations were applied for estimating the run-up at Vale do Lobo beach during1991: one based on field data and the other based on physical model tests. Two water levelswere considered and a sensitivity analysis was performed to evaluate the differences betweenthe two formulations and the impact of some of the parameters on the end results. The floodlevels were also estimated.