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Natural Hazards and Earth System Sciences
2822 Publications
collected from a compatible aggregator


  • Time–frequency analysis of the sea state with the Andrea freak wave

    Z. Cherneva; C. Guedes Soares (2014)
    The nonlinear and nonstationary properties of a special field wave record are analysed with the Wigner spectrum with the Choi–Williams kernel. The wave time series, which was recorded at the Ekofisk complex in the central North Sea at 00:40 UTC (universal time coordinated) on 9 November 2007, contains an abnormally high wave known as the "Andrea" wave. The ability of the Wigner spectrum to reveal the wave energy distribution in frequency and time is demonstrated. The results...

    Modeling the economic costs of disasters and recovery: analysis using a dynamic computable general equilibrium model

    W. Xie; N. Li; J.-D. Wu; X.-L. Hao (2014)
    Disaster damages have negative effects on the economy, whereas reconstruction investment has positive effects. The aim of this study is to model economic causes of disasters and recovery involving the positive effects of reconstruction activities. Computable general equilibrium (CGE) model is a promising approach because it can incorporate these two kinds of shocks into a unified framework and furthermore avoid the double-counting problem. In order to factor both shocks i...

    A relative vulnerability estimation of flood disaster using data envelopment analysis in the Dongting Lake region of Hunan

    C.-H. Li; N. Li; L.-C. Wu; A.-J. Hu (2013)
    The vulnerability to flood disaster is addressed by a number of studies. It is of great importance to analyze the vulnerability of different regions and various periods to enable the government to make policies for distributing relief funds and help the regions to improve their capabilities against disasters, yet a recognized paradigm for such studies seems missing. Vulnerability is defined and evaluated through either physical or economic–ecological perspectives depending on the field of the...

    Laboratory tests for the optimization of mesh size for flexible debris-flow barriers

    C. Wendeler; A. Volkwein (2015)
    Flexible barriers can be used within channelized riverbeds as an effective and efficient alternative to protect from debris flows. Their retention capability strongly depends on the size of the mesh openings and the gap between the lower barrier edge and the channel's floor. The question is now whether there is a relation between the grain size distribution of the debris material and the openings of a flexible barrier. Small-scale laboratory tests were performed to study ...

    Towards thresholds of disaster management performance under demographic change: exploring functional relationships using agent-based modeling

    G. Dressler; G. Dressler; B. Müller; B. Müller; K. Frank; K. Frank; C. Kuhlicke (2016)
    Effective disaster management is a core feature for the protection of communities against natural disasters such as floods. Disaster management organizations (DMOs) are expected to contribute to ensuring this protection. However, what happens when their resources to cope with a flood are at stake or the intensity and frequency of the event exceeds their capacities? Many cities in the Free State of Saxony, Germany, were strongly hit by several floods in the last years and are...
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