Abstract
This paper presents the geomatic contribution to the hydrographical survey applied to the Arno River in Tuscany (Italy) that has been performed to obtain both underwater cross-sections as well as riverbank height using point cloud data from echo-sounder and terrestrial laser scanner so that water flow storage capability could be further estimated with high accuracy. The control network and ground control points design, measurement and adjustment are presented, describing the solutions adopted to face the specific needs of the project. The overall accuracy assessment is performed considering some known vertices: the results are fully compliant with the requirements for subsequent hydrological analysis.
Highlights
IntroductionThe data acquired by this project aims to support both hydrographic and structural studies [3]: on the one hand, they will be used to make analysis and mathematical models suitable to predict the maximum flow rates that the various sections of the river can pass without problems; on the other hand, they will supply the assessment of the condition of the bridges for stability and integrity
Project introduction and goals On the occasion of the 50th anniversary of the Flood of Florence (November 4th, 1966), described in detail in [1], it was decided to carry out a complete survey of the entire urban section of the Arno River, to acquire the geometry of the riverbed and banks as completely and accurately as possible
The data acquired by this project aims to support both hydrographic and structural studies [3]: on the one hand, they will be used to make analysis and mathematical models suitable to predict the maximum flow rates that the various sections of the river can pass without problems; on the other hand, they will supply the assessment of the condition of the bridges for stability and integrity. These studies require to know the morphology of the underwater and emerged parts and they are traditionally based on classical topographic survey [4]
Summary
The data acquired by this project aims to support both hydrographic and structural studies [3]: on the one hand, they will be used to make analysis and mathematical models suitable to predict the maximum flow rates that the various sections of the river can pass without problems; on the other hand, they will supply the assessment of the condition of the bridges for stability and integrity. These studies require to know the morphology of the underwater and emerged parts and they are traditionally based on classical topographic survey [4]. The sections must all refer to a unique system so that the distances and the differences in height measured on the surveyed data and in the real word are immediately comparable
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