The research here presented aims to investigate the response of an urban drainage system to the effects of climate change. Recognized by scientific world as one of the biggest challenge of the XXI century, climate change could create problems to the urban environments: more frequent rainfalls, floods and heat waves will be the most serious difficulties that cities will need to deal with. Urban infrastructures, like transport and drainage systems, could be affected by effects of climate change. In detail, for heavy precipitations and floods current drainage system could be insufficient. This could cause waterlogged roads where water runs on the impervious surfaces even by overflowing manholes. However, low time resolution of General Circulation Models together with the need of rainfall-runoff models that require high resolution data in urban environment drove researchers towards a dual approach. They indeed became more and more interested in analysing the effects of climate change in extra-urban areas and, at the same time, in designing new drainage systems including low impact developments (LIDs). The purpose of this dissertation has been instead to study effects of climate change in a current urban drainage system, comparing its fails to those that already exist and evaluating the potential worsening.
Questa ricerca mira a studiare la risposta al cambiamento climatico di un sistema di drenaggio urbano. Riconosciuto dal mondo scientifico come un delle più grandi sfide del XXI secolo, il cambiamento climatico rischia di mettere alla prova i centri abitati: più frequenti precipitazioni, alluvioni e ondate di calore saranno i problemi più impegnativi che le città dovranno affrontare. Ciò potrebbe comportare serie conseguenze per le infrastrutture urbane come i sistemi di trasporto e le reti di drenaggio. Nello specifico, in caso di forti precipitazioni e alluvioni il pericolo è che i sistemi di drenaggio esistenti si rivelino inadeguati. In questo caso le strade vengono sommerse dall'acqua che defluisce sulla superficie impermeabile anche a causa del rigurgito dai pozzetti fognari. Tuttavia, la bassa risoluzione temporale dei GCM unita alla necessità dei modelli afflusso-deflusso che in ambito urbano richiedono dati ad alta risoluzione, ha portato gli scienziati , da un lato, ad approfondire maggiormente gli effetti del cambiamento in aree extraurbane e, dall'altro, ad occuparsi della progettazione di nuovi sistemi di drenaggio urbano comprendenti strategie innovative di gestione delle acque piovane. Questo studio vuole invece valutare gli effetti che il cambiamento climatico può provocare su un sistema di drenaggio urbano esistente, confrontando le criticità risultanti con quelle già presenti per stimarne l'eventuale aggravamento.
Bidera Miceli, L.Effects of climate change on the urban drainage system of Palermo.
Effects of climate change on the urban drainage system of Palermo
Bidera Miceli, Laura
Abstract
The research here presented aims to investigate the response of an urban drainage system to the effects of climate change. Recognized by scientific world as one of the biggest challenge of the XXI century, climate change could create problems to the urban environments: more frequent rainfalls, floods and heat waves will be the most serious difficulties that cities will need to deal with. Urban infrastructures, like transport and drainage systems, could be affected by effects of climate change. In detail, for heavy precipitations and floods current drainage system could be insufficient. This could cause waterlogged roads where water runs on the impervious surfaces even by overflowing manholes. However, low time resolution of General Circulation Models together with the need of rainfall-runoff models that require high resolution data in urban environment drove researchers towards a dual approach. They indeed became more and more interested in analysing the effects of climate change in extra-urban areas and, at the same time, in designing new drainage systems including low impact developments (LIDs). The purpose of this dissertation has been instead to study effects of climate change in a current urban drainage system, comparing its fails to those that already exist and evaluating the potential worsening.File | Dimensione | Formato | |
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