VISK: A GIS-compatible platform for micro-scale assessment of flooding risk in urban areas

R. De Risi, F. Jalayer*, I. Iervolino, G. Manfredi, S. Carozza

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

11 Citations (Scopus)

Abstract

Evaluation of the vulnerability of buildings in urban areas to flooding is a fundamental step in flooding risk mitigation. In this work, a new GIS-compatible computer platform with Matlab®-based graphical user interface is presented: VISK, "Visual Vulnerability & Risk", flooding module. This platform performs detailed (micro-scale) flood risk assessment for building stock with more-or-less similar characteristics. The GIS compatibility allows for graphical processing of both input and output to the program, providing an efficient visualization of flooding risk. At the core of the platform lies a comprehensive probability-based algorithm for the assessment of the vulnerability of a class of buildings to flooding. This Bayesian algorithm is based on assigning prescribed analytic uni- and bi-modal probability distributions for characterizing the flooding structural fragility functions. This allows for efficient evaluation of structural fragility based on a small number of (around 30-50) Monte Carlo simulations. The fragility calculations are performed on a bi-dimensional finite-element structural model considering the openings (door and windows) constructed using open-source software Opensees. The uncertain structural modeling parameters are characterized through, orthophoto recognition, sample in-situ building survey, laboratory test results for material mechanical properties and literature survey. Finally, the risk map is generated by integrating the flooding hazard and fragility taking into account additional information on the exposure (e.g., repair costs, population density, etc.). The results can be visualized both in a detailed building-to-building scale (of potential interest to single house-holds) or as overall estimates for the entire area (of interest to policy makers).

Original languageEnglish
Title of host publicationECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference
PublisherNational Technical University of Athens
Pages1281-1302
Number of pages22
Publication statusPublished - 1 Jan 2013
Event4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013 - Kos Island, Greece
Duration: 12 Jun 201314 Jun 2013

Conference

Conference4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013
CountryGreece
CityKos Island
Period12/06/1314/06/13

Keywords

  • Bayesian parameter estimation
  • Fragility
  • Graphical user interface
  • Portfolio of structures
  • Vulnerability assessment

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