The soil consumption related to the past decades and the consequent waterproofing of the land, along with climate change on a global scale, with the increase of the frequency of extreme weather events, is leading to an increase in hydrogeological risk in many areas, including Italy. The objective of this study is to evaluate the effects of the inclusion of green infrastructure in the management of the rainwater through the identification of suitable areas for the inclusion in the urban context. The study area is the city of Villafranca di Verona with its industrial zone and the town of Dossobuono which includes another industrial area and a part of Valerio Catullo Airport. The i-Tree Hydro+ hydrology model was applied to evaluate the potential benefits of including green infrastructure by comparing outflows from 2021 rainfall. In particular, four simulations were made: the first refers to the current state of the territory of Villafranca di Verona, while the other three simulations concern the inclusion of green roofs, Permeable Pavements and rain gardens placed in a strategical way within the most industrialized areas of the study area, while respecting the landscape constraints. The results of the simulations have shown that the application of the three types of green infrastructure lead to a significant reduction in runoff volumes in the areas under study, avoiding the direct conveyance of rainwater into the sewerage system and favouring infiltration into the soil, thus reducing flood damage and exploiting rainwater as a resource.
Il consumo di suolo degli ultimi decenni e la conseguente impermeabilizzazione, assieme ai cambiamenti climatici su scala globale, con l’aumento della frequenza degli eventi meteorologici estremi, sta portando a un incremento del rischio idrogeologico in numerose zone, compresa l’Italia. L’obiettivo del presente studio è di valutare gli effetti dell’inserimento di infrastrutture verdi nella gestione dell’acqua piovana attraverso l’identificazione di aree idonee per il loro inserimento nel contesto urbano. L’area di studio è la città di Villafranca di Verona con la sua zona industriale e il paese di Dossobuono che comprende un'altra zona industriale e una parte dell’aeroporto Valerio Catullo. Per valutare gli eventuali benefici dell’inserimento di infrastrutture verdi è stato applicato il modello idrologico del pacchetto i-Tree Hydro+ confrontando i deflussi generati dalle piogge verificatesi nell’anno 2021. In particolare, le simulazioni sono state quattro: la prima ha riguardato lo stato attuale in cui si trova il territorio oggetto di studio del comune di Villafranca di Verona, mentre le altre tre simulazioni hanno riguardato l’inserimento di verde pensile (Green Roof), di pavimentazioni drenanti (Permeable Pavement) e di giardini pluviali (Rain Garden) posizionati strategicamente all’interno delle zone maggiormente urbanizzate e industrializzate dell’area di studio, rispettando comunque la vincolistica di ambito paesaggistico. I risultati delle simulazioni hanno evidenziato che l’applicazione delle tre tipologie di infrastrutture verdi comportano una notevole riduzione dei volumi di runoff nelle aree oggetto di studio, evitando il convogliamento diretto all’interno delle reti fognarie delle acque meteoriche e favorendo l’infiltrazione nel terreno, consentendo quindi di ridurre eventuali danni da allagamento e sfruttando l’acqua di pioggia come una risorsa.
Infrastrutture verdi per la gestione dei deflussi di pioggia a Villafranca di Verona: applicazione del modello i-Tree Hydro+
ALBERTI, FEDERICO
2021/2022
Abstract
The soil consumption related to the past decades and the consequent waterproofing of the land, along with climate change on a global scale, with the increase of the frequency of extreme weather events, is leading to an increase in hydrogeological risk in many areas, including Italy. The objective of this study is to evaluate the effects of the inclusion of green infrastructure in the management of the rainwater through the identification of suitable areas for the inclusion in the urban context. The study area is the city of Villafranca di Verona with its industrial zone and the town of Dossobuono which includes another industrial area and a part of Valerio Catullo Airport. The i-Tree Hydro+ hydrology model was applied to evaluate the potential benefits of including green infrastructure by comparing outflows from 2021 rainfall. In particular, four simulations were made: the first refers to the current state of the territory of Villafranca di Verona, while the other three simulations concern the inclusion of green roofs, Permeable Pavements and rain gardens placed in a strategical way within the most industrialized areas of the study area, while respecting the landscape constraints. The results of the simulations have shown that the application of the three types of green infrastructure lead to a significant reduction in runoff volumes in the areas under study, avoiding the direct conveyance of rainwater into the sewerage system and favouring infiltration into the soil, thus reducing flood damage and exploiting rainwater as a resource.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/32002