Our country is deeply susceptible to hydrogeological events that cause great damage. These are issues that put at risk human life and the pursuit of economic and social activities, challenging the resilience of communities. At the same time, intervention systems which are only based on structural measures, that were proposed at the end of the last century, have many adverse effects related to soil consumption, heavy interactions with territories that lead to litigation, as well as sometimes significant effects on Morphodynamics and the river ecosystem. It is therefore increasingly important to look for low impact solutions and integrate them with non-structural actions in order to achieve strategies that combine effectiveness, economic feasibility, , sustainability, certainty and rapid implementation. The thesis deals with the theme of levees’ reconditioning in an original concept of hydraulic design "to the limit states" in order to maximize the capacity of peak’s reduction in the river, considering slight flooding of the coast, where sustainable, at catastrophic events. This is a preliminary study, which aims to define the problem through a framing of the phenomena involved and the issues to be addressed. Regarding in particular the study of hydraulic phenomena in the riverbed, we proposed a schematization of the problem in the space of the dimensional parameters, following an extensive morphological analysis on some Italian plain contexts. The results, supported by a cost-effective economic analysis, are encouraging and suggest further work developments.
Il nostro Paese è particolarmente soggetto ad eventi idrogeologici che causano ogni anno danni ingentissimi. Si tratta di problemi che mettono a rischio in primo luogo la vita umana nonché l’assetto economico e sociale, cimentando la resilienza delle comunità. Al contempo, i sistemi di interventi basati esclusivamente su misure rigidamente strutturali, proposti alla fine del secolo scorso, comportano spesso numerosi effetti collaterali negativi, legati al consumo di suolo, a pesanti interazioni con i territori che comportano l’insorgenza di contenziosi, oltreché effetti talvolta significativi sulla morfodinamica e sull’ecosistema fluviale. Appare pertanto sempre più importante la ricerca di soluzioni a basso impatto e integrate con azioni non strutturali, in modo tale da conseguire modalità di intervento che uniscano efficacia, economicità, sostenibilità, certezza e rapidità di implementazione. La tesi affronta il tema del ricondizionamento arginale in una concezione originale di progettazione idraulica “agli stati limite” al fine di massimizzare le risorse di laminazione in alveo, considerando anche lievi inondazioni del territorio rivierasco, laddove sostenibile, e in corrispondenza di eventi catastrofici . Si tratta di uno studio preliminare, che mira a definire il problema, attraverso un inquadramento dei fenomeni coinvolti e dei temi da affrontare. Per quanto riguarda in particolare lo studio dei fenomeni idraulici in alveo, si è proposto una schematizzazione del problema nello spazio dei parametri adimensionali, dopo una estesa analisi morfologica su alcuni contesti di pianura italiani. I risultati, confortati da una analisi economica speditiva, sono incoraggianti e suggeriscono ulteriori sviluppi del lavoro.
Strategie innovative per la gestione del rischio alluvione attraverso il potenziamento dei sistemi arginali
ZAMBRINI, FEDERICA
2016/2017
Abstract
Our country is deeply susceptible to hydrogeological events that cause great damage. These are issues that put at risk human life and the pursuit of economic and social activities, challenging the resilience of communities. At the same time, intervention systems which are only based on structural measures, that were proposed at the end of the last century, have many adverse effects related to soil consumption, heavy interactions with territories that lead to litigation, as well as sometimes significant effects on Morphodynamics and the river ecosystem. It is therefore increasingly important to look for low impact solutions and integrate them with non-structural actions in order to achieve strategies that combine effectiveness, economic feasibility, , sustainability, certainty and rapid implementation. The thesis deals with the theme of levees’ reconditioning in an original concept of hydraulic design "to the limit states" in order to maximize the capacity of peak’s reduction in the river, considering slight flooding of the coast, where sustainable, at catastrophic events. This is a preliminary study, which aims to define the problem through a framing of the phenomena involved and the issues to be addressed. Regarding in particular the study of hydraulic phenomena in the riverbed, we proposed a schematization of the problem in the space of the dimensional parameters, following an extensive morphological analysis on some Italian plain contexts. The results, supported by a cost-effective economic analysis, are encouraging and suggest further work developments.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/135618