Utilizzo di UAV per la mappatura del rischio idraulico
Author(s)
Arcangeletti, Ettore
Date Issued
May 16, 2016
Type
Doctoral Thesis
Abstract
The production of flood prone areas maps, that are the main non-structural instruments against the hydrogeological risk, generally follows a traditional approach based on the use of the Rational Formula for determining the design hydrograph and the subsequent propagation of such hydrograph in the DTM (Digital Terrain model) employing a bi-dimensional hydraulic model. Usually the DTM model used is derived from a survey LiDAR (Light Detection and Ranging) or by a topographic survey or digitizing the official cartography. Here we will explore an alternative and innovative methodology based on the use of a physically based hydrologic model (EBA4SUB - Event Based Approach for Small and Ungauged Basins) for determining the flood hydrograph. Such hydrograph, alternative to that obtained with the rational formula, will be conveyed in the DTM always using a bi-dimensional hydraulic model for the hydraulic simulation. However, in this case, the DTM is derived from a photogrammetric survey employing a UAV and a low cost instrumentation. The aim of this work is therefore to analyze and to quantify the differences between the two aforementioned different approaches evaluating how the input variables, both hydrological and morphological, affect the flooding maps. Moreover, aim of this work is also to propose a combined and innovative methodology for the production of such maps, using the advantages of DTM derived from UAVs, i.e. mainly the low cost, the repeatability and the capacity of reconstruct the man-made structures and buildings.
Additional information
Dottorato di ricerca in Ingegneria dei sistemi agrari e forestali
Subjects
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earcangeletti_tesid.pdf
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