Abstract
Natural hazards have greater social and economic impact in urban areas because urbanization and economic development increase people and assets’ concentration in high-risk prone areas: hazards generate risks in relation to population’s exposure and its physical and economic assets.
Advanced urban planning is one of the involved disciplines in the process of human exposure and risks reduction: defining strategic actions, it can reduce losses following natural disasters and, in the same time, ensure a flexible design able to absorb external impacts, to transform and to adapt itself, increasing urban resilience.
The paper defines two possible strategies of intervention in city as risk mitigation methods: Areal Change and Functional Change.
Authors describe the use of scenario planning and Multicriteria evaluation (ANP method) to deepen suitable strategies at urban level. Moreover, authors introduce the first instruments useful for the future application of the presented method: ideal city modeling and evaluation criteria definition.
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Notes
- 1.
Disaster is a hazardous event that occurs over a limited time in a defined area.
- 2.
Catastrophe is a massive disaster that requires significant expenditure of money and a long time for recovery.
- 3.
For each pairwise matrix, it defines: principle normalized eigenvalues; non-weighted supermatrix; weighted supermatrix, limit supermatrix and the alternatives’ ranking.
- 4.
Authors choose Pavia (medium sized city located in Northern Italy) to apply the ideal city modeling because it is characterized by the typical elements of European historical cities and it has a database with detailed urban information that authors can easily consult. [30].
- 5.
High-density ≥ 6 \( [{{\text{m}^{3} } \mathord{\left/ {\vphantom {{\text{m}^{3} } {\text{m}^{2} }}} \right. \kern-0pt} {\text{m}^{2} }}] \); Medium-density between 2.5 and 6 \( [{{\text{m}^{3} } \mathord{\left/ {\vphantom {{\text{m}^{3} } {\text{m}^{2} }}} \right. \kern-0pt} {\text{m}^{2} }}] \); Low-density ≤ 2.5 \( [{{\text{m}^{3} } \mathord{\left/ {\vphantom {{\text{m}^{3} } {\text{m}^{2} }}} \right. \kern-0pt} {\text{m}^{2} }}] \).
- 6.
Data from Pavia Camera di Commercio price list [31].
- 7.
Ideals: final normalized judgments in the 0–1 gap; Normals: final normalized judgments related to their sum; Raw: values from priority vector of limit supermatrix.
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De Lotto, R., Gazzola, V., Gossenberg, S., Morelli di Popolo, C., Venco, E.M. (2016). Proposal to Reduce Natural Risks: Analytic Network Process to Evaluate Efficiency of City Planning Strategies. In: Gervasi, O., et al. Computational Science and Its Applications -- ICCSA 2016. ICCSA 2016. Lecture Notes in Computer Science(), vol 9789. Springer, Cham. https://doi.org/10.1007/978-3-319-42089-9_46
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