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PurposeClimate change has had serious consequences at the global and local levels, which has required more effective scientific studies and management measures for disaster risk reduction strategies. This paper aims to analyze and discuss the degree of institutional vulnerability in terms of disaster risk governance, with emphasis on non-structural measures taken in the municipality of Jaboatão dos Guararapes, Pernambuco, Brazil.Design/methodology/approachFive indicators were analyzed, composed of Planning and Management Instrument, Management Structure, Preventive Action, Multidisciplinary Work and Emergency Funds. It is worth highlighting the form application with government actors, involving technicians from strategic areas of the municipality and official reports analysis. It stands out the importance of non-structural measures to strengthen this governance.FindingsFrom the results of this study was noted that municipal management adopted measures to develop integrated planning, acting within the principles recommended in the Sendai framework (2015–2030), characterized as a medium degree of institutional vulnerability. Recommendations are suggested for the improvement of the entire governance system, according to the indicators and documents analyzed.Originality/valueThis article integrates a set of data and analyses relevant to the Disaster Risk Governance, regarding the assessment of institutional vulnerability with a view to non-structural actions. The importance and significance of the composed indicators allow measuring and evaluating institutional vulnerabilities. The methodology created fomented the production of scientific knowledge that allows employment in other municipalities.

Geotechnical projects typically achieve load transfer to the ground using shallow or deep foundations. The conventional design approach does not provide for the combination of these two types of foundation. The piled raft philosophy allows the association of the soil elements, raft, and piles to obtain technical and economic advantages over conventional design. The city of João Pessoa, in northeastern Brazil, has developed foundation practices with hollow auger piles in piled raft design. The coastal area of the city has topsoil layers with favorable conditions for using such a technique. This paper addresses the results of a research project with instrumented load tests on foundation systems of hollow auger piles and a piled raft. The analysis is based on the load-settlement curve through extrapolation criteria. The Poulos-Davis-Randolph (PDR) method is applied according to a trilinear and hyperbolic approach to simulate the load-settlement curve of piled rafts. The results indicate that the raft absorbs most of the load, and the raft-soil contact significantly increases the load capacity of the foundation. The PDR hyperbolic method could apply to practical use in the foundations of the region, as it allows a more detailed assessment of the behavior of the foundation and can forecast the behavior of the (locally nontraditional) piled raft foundation system. Résumé :Dans les projets géotechniques, le transfert de charge vers le sol est habituellement réalisé à l'aide de fondations superficielles ou profondes. La méthode traditionnelle de conception ne prévoit pas l'association de ces deux types de fondations. L'approche des radiers sur pieux permet de combiner les éléments de sol, le radier et les piles de manière, ce qui comporte des avantages techniques et économiques par rapport à la méthode de conception traditionnelle. La ville de João Pessoa, dans le Nord-Est du Brésil, a mis en place des pratiques de construction des fondations prévoyant l'utilisation de pieux à tarière creuse lors de la conception de radiers sur pieux. La couche superficielle du sol dans la zone côtière de la ville est favorable à l'utilisation d'une telle technique. Le présent article présente les résultats d'un projet de recherche comportant des essais instrumentés effectués sur des systèmes de fondations constitués de pieux à tarière creuse et d'un radier sur pieux. L'analyse est basée sur la courbe charge-tassement et fait appel à des critères d'extrapolation. La méthode de Poulos-Davis-Randolph (PDR) est appliquée en suivant une approche trilinéaire et hyperbolique afin de simuler la courbe charge-tassement de radiers sur pieux. Les résultats montrent que le radier absorbe l'essentiel de la charge et que le contact entre le radier et le sol a pour effet d'augmenter de manière significative la capacité de charge de la fondation. La méthode hyperbolique PDR pourrait s'appliquer dans la pratique aux fondations construites dans la région de João Pessoa étant donné qu'elle permet d'évaluer plus en détail le comportement de la fondation et...

As ravinas consistem em uma das formas de erosão hídrica com escoamento superficial concentrado em encostas de áreas degradadas e, ainda, sem escoamentos de subsuperfície. Os objetivos deste trabalho foram estudar o comportamento hidráulico do escoamento superficial das ravinas e determinar a erodibilidade (Kr) e a tensão crítica de cisalhamento (τc) na superfície de ravinas e, também, a erodibilidade (Kr) ao longo do perfil de encostas degradadas do litoral do Estado de Pernambuco. O experimento foi realizado em 2005, em um Latossolo Amarelo de textura argilosa pertencente à Formação Barreiras no município do Cabo de Santo Agostinho, PE. As parcelas foram delimitadas por chapas metálicas cravadas no solo no sentido do declive (1,0 m de largura por 3,0 m de comprimento). Os testes consistiram na aplicação de quatro níveis de vazão, determinando-se o volume de descarga líquida e a massa de sedimentos desagregados. As taxas de desagregação de solo foram lineares em relação às tensões de cisalhamento. Na superfície das ravinas, a erodibilidade (Kr) foi de 0,0016 kg N-1 s-1 e a tensão crítica de cisalhamento, de τc = 4,37 Pa. O baixo valor de erodibilidade e o alto de tensão crítica de cisalhamento de τc obtidos na superfície das ravinas possivelmente decorreram da formação de uma crosta superficial originada por ciclos de umedecimento e secagem. A erodibilidade (Kr) em profundidade variou entre 0,012 e 0,070 kg N-1 s-1, em função do teor de argila. O regime do escoamento superficial nas ravinas foi turbulento supercrítico e, portanto, semelhante ao do escoamento superficial nos sulcos de erosão, como descrito na literatura.

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