Esposito, Angela (2016) Assessing impacts of flood events in urban areas to understand the resilience of the urban system. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: Assessing impacts of flood events in urban areas to understand the resilience of the urban system
Creators:
CreatorsEmail
Esposito, Angelaangela_esposito@hotmail.it
Date: 31 March 2016
Number of Pages: 190
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Civile, Edile e Ambientale
Scuola di dottorato: Ingegneria civile
Dottorato: Ingegneria dei sistemi idraulici, di trasporto e territoriali
Ciclo di dottorato: 28
Coordinatore del Corso di dottorato:
nomeemail
Petroncelli, Elviraelvira.petroncelli@unina.it
Tutor:
nomeemail
Petroncelli, ElviraUNSPECIFIED
Date: 31 March 2016
Number of Pages: 190
Uncontrolled Keywords: Flood risk, Urban resilience, Space Syntax
Settori scientifico-disciplinari del MIUR: Area 08 - Ingegneria civile e Architettura > ICAR/20 - Tecnica e pianificazione urbanistica
Date Deposited: 11 Apr 2016 09:06
Last Modified: 31 Oct 2016 11:05
URI: http://www.fedoa.unina.it/id/eprint/11099

Abstract

The introduction of the concept of urban resilience in managing risk of natural hazards in urban areas is closely related to pointing out suitable resilience assessments. In general, resilience can be defined as the ability of a given system to face and adapt itself to unexpected events, or stressful conditions. However, resilience can assume several meanings and it can also be applied to various different field of analysis. The technical literatures, indeed, offers a large set of definitions of resilience and many approaches have been developed so far to study this property. Topical relevance of resilience, especially in reference to natural hazards, is then combined with a broad scientific debate. In this general background, the thesis analyses urban resilience to flood risk through spatial analyses. Developing a conceptual definition of urban resilience, a methodological approach is presented to assess urban resilience of settlements located next to rivers. Assuming the configurational theory of Space Syntax to investigate the spatial layout, urban areas are analysed, in reference both to their spatial and functional features. Space Syntax is based on connections between the geometrical pattern of urban spaces (as well as spatial and visual relationships between the latter) and urban phenomena occurring within the said spaces. These connections are basically described by measures of topological centrality. Therefore, presence of flooded areas is examined according to its ability to affect spatial accessibility, consequently influencing the use of urban space. Applying the configurational approach, effects of flooded zones on spatial perception and human navigation are examined, towards evaluating consequences of floods on urban dynamics. All these aspects are related to the capability of flooded urban systems to mitigate effects of flooding, adapting itself to flood-induced consequences and preserving urban functions. This ability actually corresponds to the resilience of the considered urban systems. The proposed methodology consists of different stages of analysis. Syntactic features and urban morphology are considered, applying configurational techniques and statistical method to process syntactic data. As a result, a set of objective and quantitative measures are achieved, able to describe the degree of resilience of urban areas located on river banks, or rather, exposed to flood risk.

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