Shallow landslides, considered devastating natural events, are recognized as one of the significant hazards in mountainous areas. Its destructive potential poses a significant threat, leading to severe consequences including damage to both human lives and infrastructures. There are various studies that mapped the spatial distribution of shallow landslide susceptibility in different study areas, which can be used in disaster prevention, mitigation, and risk management. Thus, it is necessary to consider risk assessments for these types of landslides. It is crucial to analyze the information gathered from prior events and examine them to accomplish that. The shallow landslides that occurred in Valtellina have been considered for this research's case study section of the thesis. The fundamental characteristics for the landslide modeling have been extracted from bibliographical articles as well as from the evaluation of raster and vector files using GIS software. A program called "VS2Dt" has been used to model the landslides. To estimate the rainfall thresholds for each of the sites within the case study region, the findings for each intensity of rainfall must be evaluated as the last step. The study provides the analyzed information and data of the different characteristics of Valtellina that will be used to extract rainfall thresholds for the case study areas including seven sites which can be used to mitigate the risks of landslides. The approach of this study was based on a physics-empirical method that as an innovative approach was used for the low-resolution data.
Le frane superficiali, considerate eventi naturali devastanti, sono riconosciute come uno dei pericoli significativi nelle aree montane. Il suo potenziale distruttivo rappresenta una minaccia significativa, che porta a gravi conseguenze, tra cui danni alle infrastrutture e perdita di vite umane. Esistono vari studi che hanno mappato la distribuzione spaziale della suscettibilità alle frane superficiali in diverse aree di studio, che possono essere utilizzati nella prevenzione, mitigazione e gestione del rischio. Pertanto, è necessario considerare le valutazioni del rischio per questi tipi di frane. È fondamentale analizzare le informazioni raccolte da eventi precedenti ed esaminarle per raggiungere questo obiettivo. Le frane superficiali avvenute in Valtellina sono state prese in considerazione per la sezione caso studio della tesi. Le caratteristiche fondamentali per la modellazione della frana sono state estratte dagli articoli bibliografici e dalla valutazione di file raster e vettoriali mediante software GIS. Per la modellizzazione delle frane è stato utilizzato il programma "VS2D". Al fine di stimare le soglie di precipitazione per ciascuno dei siti all'interno della regione del caso di studio, i risultati per ciascuna intensità di pioggia devono essere valutati come ultimo passaggio. Lo studio fornisce le informazioni e i dati analizzati delle diverse caratteristiche della Valtellina che verranno utilizzati per estrarre le soglie pluviometriche per le aree di studio, inclusi sette siti che possono essere utilizzati per mitigare i rischi di frane. L'approccio di questo studio si è basato su un metodo fisico-empirico che è stato utilizzato come approccio innovativo per i dati a bassa risoluzione.
A physics-empirical approach for rainfall thresholds estimation in Valtellina valley (Northern Italy)
Abbasi Feshki, Benyamin
2022/2023
Abstract
Shallow landslides, considered devastating natural events, are recognized as one of the significant hazards in mountainous areas. Its destructive potential poses a significant threat, leading to severe consequences including damage to both human lives and infrastructures. There are various studies that mapped the spatial distribution of shallow landslide susceptibility in different study areas, which can be used in disaster prevention, mitigation, and risk management. Thus, it is necessary to consider risk assessments for these types of landslides. It is crucial to analyze the information gathered from prior events and examine them to accomplish that. The shallow landslides that occurred in Valtellina have been considered for this research's case study section of the thesis. The fundamental characteristics for the landslide modeling have been extracted from bibliographical articles as well as from the evaluation of raster and vector files using GIS software. A program called "VS2Dt" has been used to model the landslides. To estimate the rainfall thresholds for each of the sites within the case study region, the findings for each intensity of rainfall must be evaluated as the last step. The study provides the analyzed information and data of the different characteristics of Valtellina that will be used to extract rainfall thresholds for the case study areas including seven sites which can be used to mitigate the risks of landslides. The approach of this study was based on a physics-empirical method that as an innovative approach was used for the low-resolution data.| File | Dimensione | Formato | |
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https://hdl.handle.net/10589/218691