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Publications (68)
Despite the high accuracy of conventional acoustic hydrographic systems, measurement of the seabed along coastal belts is still a complex problem due to the limitations arising from shallow water. In addition to traditional echo sounders, airborne LiDAR also suffers from high application costs, low efficiency, and limited coverage. On the other han...
Bathymetric surveys of shallow waters are increasingly necessary for navigational safety and environmental studies. In situ surveys with floating acoustic sensors allow the collection of high-accuracy bathymetric data. However, such surveys are often unfeasible in very shallow waters in addition to being expensive and requiring specific sectorial s...
Earth Observation (EO) from satellites has the potential to provide comprehensive, rapid and inexpensive information about water bodies, integrating in situ measurements. Traditional methods to retrieve optically active water quality parameters from satellite data are based on semi-empirical models relying on few bands, which often revealed to be s...
From 2014, the European Commission established guidelines for drafting the SUMP (Sustainable Urban Mobility Plan), defined as “a strategic plan to meet the varied mobility demand of people and businesses in urban and peri-urban areas in order to improve the quality of life in cities”. More recently, BiciPlans were introduced as mandatory for munici...
Slope stability is strongly influenced by soil hydraulic conditions. Considering rain-triggered shallow landslides, the stability can be markedly influenced by the propagation of the saturation front inside the unsaturated zone. Soil shear strength varies in the vadose zone depending on the type of soil and the variations of soil moisture. Monitori...
Turbidity is a visual property of water, related to the presence of suspended particles in waters. This parameter is measured in different water quality monitoring programmes as it can determine negative environmental effects both on the biotic and abiotic marine ecosystem. Traditional methods, e.g., in situ monitoring, offer high accuracy but prov...
The paper presents the geomatic survey campaign carried out in the Domus V of Pompeii Archaeological site, the photogrammetric processing of the collected images and the following fruition of the deriving products deploying open-source software. Among all the produced results, the orthophotos of the vertical walls of one of the Domus V rooms are ma...
The management of emergency scenario is a very complex issue, due to the risk of recurrence of the calamity itself. The present work is intended as a methodological report based on the gained professional and scientific experience of the authors, involved in the survey of several Cultural Heritage buildings hit by the earthquakes that afflicted Cen...
The approach in the teaching process is changing, thanks to the increased awareness that a higher students’ involvement leads to a better quality of their learning. The aim is to make the students more participative, avoiding a unidirectional lesson and encouraging their wish to keep updated on the course advancements. However, innovative teaching...
Integrated remote sensing techniques, such as photogrammetry from unmanned aerial vehicles (UAV), mobile laser scanners (MLS) and multibeam echosounders (MBES), are particularly effective in detecting and measuring coastal and seabed features and their modifications over time (4D analysis) induced by sea storms. In fact, these techniques allow the...
In the originally published version of the chapter 5, the name of the author Stefania Viaggio was incorrect. The name has been corrected.
The present work aims to illustrate the experience in geomatic dissemination, gained by actively participating and contributing to seminars, lectures and educational workshops, applying both traditional and innovative teaching methods. The main focus is on two educational workshops: one on altitude, its measurement techniques, issues and the evolut...
Monitoring changes in soil saturation is important for slope stability analyses. Soil moisture capacitive sensors have recently been developed; their response time is extremely fast, they require little maintenance, and they are relatively inexpensive. The use of low-cost sensors in landslide areas can allow the monitoring of large territories, but...
The authors conceived the GNSS for Meteorology (G4M) procedure to remote-sense the Precipitable Water Vapor (PWV) content in atmosphere with the aim to detect severe meteorological phenomena. It can be applied over an orographically complex area, exploiting existing networks of Global Navigation Satellite System (GNSS) Permanent Stations (PSs) and...
The authors refer in this paper some of the analyses already done and the planned activities in developing the AD-VITAM Project (InterReg V-A France – Italy – E.U. ALCOTRA), which aims to assess the most suitable techniques to obtain a reliable forecasting of rain-induced landslides, in order to enhance the territorial resilience when subject to su...
Geomorphological survey and mapping of the emerged and submerged coastal areas, particularly addressed to evaluate sea cliff instability within the assessment of coastal hazard and risk mitigation measures, require high resolution and georeferenced spatial data. Remote sensing techniques fully satisfy these needs and allow to obtain all information...
The global increase in seawater temperature is causing irreparable damages to coral reefs all over the world. Frequency of coral bleaching episodes and mass mortality is increasing and coral reefs have not enough time to recover after these impacts. The present study concerns this phenomenon in the context of the Maldives. In this scenario, monitor...
The potentialities of an integrated 3D remote sensing survey with the most diffuse techniques, i.e. photogrammetry from UAV, laser scanner and multibeam from survey boat, are enhanced. Such techniques are useful both to verify the state of conservation of maritime infrastructures from a structural point of view and to highlight the phenomena of ero...
In emergency and critical scenarios, the UAV could play a key role in accessing unreachable sites in a safe and rapid way, guaranteeing at the same time the necessary accuracy and precision of the survey. In this context, UAV survey campaigns have been performed by the authors in Norcia (Italy), hit by tragic seismic events in August and October 20...
Orthophotos are one of the most common and typical products of a photogrammetric post-processing and, since the diffusion of specific software, their generation and usage have become even more widespread. In spite of it, some issues remain on the accuracy of orthophoto reconstruction, which is often downgraded by the introduction of meshes and Digi...
La conoscenza dell'ambiente che ci circonda, comprensivo di territorio e costruito, è di fondamentale importanza per assicurarne una migliore fruizione da parte della collettività, attraverso analisi urbanistiche e territoriali, pianificazione e realizzazione di interventi di messa in sicurezza del territorio, di consolidamento o di restauro dei be...
DataBases (DB) are a widespread source of data, useful for many applications in different scientific fields. The present contribution describes an automatic procedure to access, download and store open access data from different sources, to be processed in a GIS environment. In particular, it refers to the specific need of the authors to manage bot...
DataBases (DB) are a widespread source of data, useful for many applications in different
scientific fields. The present contribution describes an automatic procedure to access,
download and store open access data from different sources, to be processed in a GIS
environment. In particular, it refers to the specific need of the authors to manage bot...
The Unmanned Aerial System (UAS) is widely used in the photogrammetric surveys both of structures and of small areas. Geomatics focuses the attention on the metric quality of the final products of the survey, creating several 3D modelling applications from UAS images. As widely known, the quality of results derives from the quality of images acquis...
The conservation of Cultural Heritage depends on the availability of means and resources and, consequently, on the possibility to make effective operations of data acquisition. In facts, on the one hand the creation of data repositories allows the description of the present state-of-art, in order to preserve the testimonial value and to permit the...
An optimized planning and realization of the survey, coupled with well thought-out processing, allows obtaining good quality results, while guaranteeing a reasonable use of resources and time. It represents a benefit for both operators and end-users. The former can save time and acquire smaller datasets to process, while the latter can invest their...
This study presents an innovative procedure to monitor the precipitable water vapor (PWV) content of a wide and orographically complex area with low-density networks. The procedure, termed G4M (global navigation satellite system, GNSS, for Meteorology), has been developed in a geographic information system (GIS) environment using the free and open...
Innovative researches developed by the Authors are described in order to demonstrate the usefulness of GIS (Geographic Information System) in support of geotechnical analysis, with particular reference to risk zoning and mitigation and to the monitoring of slopes. A multivariate statistical procedure for the estimation of landslide susceptibility,...
NARVALO is a collision avoidance system for logistic platform areas that detects possible dangerous situations, which could lead to accidents, and consequently alerts vehicles and people involved. The system is based on the real time knowledge of precise position, speed and acceleration of the monitored vehicles and operators using ad-hoc GNSS (Glo...
A useful contribution to atmosphere monitoring may be provided by the analysis of GNSS (Global Navigation Satellite System) signals. The authors have identified a procedure to monitor in space and time the Precipitable Water Vapor (PWV) content on regionally extended and orographically complex area. The starting point of the procedure is the local...
While the theory and implementation of geographic information systems (GIS) have a history of more than 50 years, the development of dedicated educational tools and applications in this field is more recent. This paper presents a free and open source software (FOSS) approach for education in the geospatial disciplines, which has been used over the...
The use of Terrestrial Laser Scanner (TLS) is quite common for architectural surveys, however it requires to arrange special targets on the scanned object and to acquire several overlapping scans, which have to be aligned and edited externally. Recently, Leica released on the market a new kind of instrument, known as MultiStation (MS). It includes...
The task of conservation and management of cultural heritage is quite central in Italy, which lists a high number of beautiful architectures. A quick and precise survey may be requested in case of calamity. In the present paper, the most commonly used survey techniques are discussed, focusing on their applications for the conservation of the artist...
An innovative environmental monitoring system - Smart Rainfall System (SRS) - that estimates rainfall in real-time by means of the analysis of the attenuation of satellite signals (DVB-S in the microwave Ku band) is presented. Such a system consists in a set of peripheral microwave sensors placed on the field of interest, and connected to a central...
The present paper proposes an automatic procedure in GIS providing maps which suggest the more appropriate and feasible intervention type to mitigate landslide risk. These maps are not intended for replacing the designer engineering judgment, nor his work, but to help him in the choice and to help the territorial protection agencies in planning int...
The Authors have developed and refined, along the past years, a physically-based Integrated Hydrological-Geotechnical model (IHG), which is able to assess the territorial landslide susceptibility per effect of rain histories. The IHG model has been applied on two benchmark sites in Liguria, showing its reliability. Hence, it may become a very usefu...
Tra le opere di difesa portuale, rivestono particolare importanza le " dighe a gettata " , strutture realizzate con massi, con geometria tale da dissipare il più possibile l'energia residua delle onde e limitare il fenomeno di tracimazione. Dato l'importante ruolo di protezione dell'area portuale, è fondamentale monitorarne lo stato di conservazion...
Come noto, l'analisi del segnale GNSS (Global Navigation Satellite System) può fornire un utile contributo al monitoraggio atmosferico e all'interpretazione di eventi meteorici intensi, sia a posteriori sia in near real-time. Gli autori hanno ideato una procedura per la realizzazione di mappe di vapore acqueo potenzialmente precipitabile (Precipita...
A physically-based Integrated Hydrological-Geotechnical model (IHG) able to assess the rainfall-induced landslide susceptibility was developed, refined and applied in GIS environment along the past years (Passalacqua 2002; Federici et al. 2014; Bovolenta et al. 2016), showing its reliability. It is a useful instrument to landslide susceptibility ev...
A physically-based Integrated Hydrological-Geotechnical model (IHG) able to assess the rainfall-induced landslide susceptibility was developed, refined and applied in GIS environment along the past years (Passalacqua 2002; Federici et al. 2014; Bovolenta et al. 2016), showing its reliability. It is a useful instrument to landslide susceptibility ev...
Among the different techniques for atmosphere monitoring, the GNSS (Global Navigation Satellite System) can provide an innovative contribution (Bevis et al.,1992; Crespi et al., 2004; Sguerso et al., 2013, 2015). The Laboratory of Geomatics, Geodesy and GIS of the University of Genoa has identified a GIS procedure and a simplified physical model to...
Among the different techniques for atmosphere monitoring, the GNSS (Global Navigation Satellite System) can provide an innovative contribution (Bevis et al.,1992; Crespi et al., 2004; Sguerso et al., 2013, 2015). The Laboratory of Geomatics, Geodesy and GIS of the University of Genoa has identified a GIS procedure and a simplified physical model to...
A physically-based Integrated Hydrological-Geotechnical model (IHG) able to assess the rainfall-induced landslide susceptibility was developed, refined and applied in GIS environment along the past years (Passalacqua 2002; Federici et al. 2014; Bovolenta et al. 2016), showing its reliability. It is a useful instrument to landslide susceptibility ev...
Among the different techniques for atmosphere monitoring, the GNSS (Global Navigation Satellite
System) can provide an innovative contribution (Bevis et al., 1992; Crespi et al., 2004; Sguerso et al.,
2013, 2015). The Laboratory of Geomatics, Geodesy and GIS of the University of Genoa has identified a
GIS procedure and a simplified physical model t...
Il presente lavoro tratta il monitoraggio altimetrico di elevata precisione a supporto del collaudo statico di un ponte in acciaio sottoposto a differenti condizioni di carico. I criteri adottati per il disegno della rete altimetrica, la relativa campagna di misure e la fase di elaborazione vengono qui analizzate per la stima degli spostamenti vert...
The present work aims to illustrate the potentiality of the GRASS command r.inund.fluv, developed in the Laboratory of Geomatics of DICCA, in the evaluation of potentially flooded areas by means of its application to the terminal reach of Magra River in Italy. Such application underlined the need of a code improvement, in order to better manage the...
The proposed fully automatic procedure in a free and open source GIS, called GRASS, allows the evaluation of the propensity of a certain portion of land to slide due to rainfall events. Great attention has been devoted to define a proper infiltration model. Widespread slope stability analyses by a Global Limit Equilibrium method have been performed...
We propose an intelligent sensor system based on a new sensing methodology, relying also on 3D map reconstruction techniques, for computing with high precision, in real-time and without human intervention the parameters needed for stream-flow computa- tion: water levels, morphology of the streams of all potentially flooded areas by each controlled...
The paper proposes an automatic procedure in geographic information system (GIS) for the analysis and prediction of landslides due to rainfall events over wide areas. It runs, for each unit cell, a hydrological balance based on the Curve Number method (USDA-SCS 1985-1986), computing the evolution of groundwater as a result of precipitation and then...
The first step of a risk assessment analysis is the evaluation of flood-prone areas. Its importance is considered for both managing and planning emergency activities, such as hydraulic risk reduction management, and also town planning. Nowadays, using Geographic Information System (GIS) technology for risk assessment analysis is very common. Howeve...
The present invention relates to an environmental monitoring system comprising a central system and a plurality of remote measuring units operatively connected to the central system. Each remote measuring unit comprises a receiver intended to receive a radio signal transmitted from a satellite and to measure the power of an electric signal generate...
The first step of a risk assessment analysis is the evaluation of flood-prone areas. Its importance is considered for both managing and planning emergency activities, such as hydraulic risk reduction management, and also town planning. Nowadays, using GIS technology for risk assessment analysis is very common. However, it is not widely used for def...
The spread presence of GNSS Permanent Station Networks makes satellite surveys simpler, quicker and cheaper, and the achievement of high precisions easier. However, the result of a GNSS campaign benefits from an accurate planning, especially in presence of natural or artificial obstructions that make satellite observations difficult. Most of the GN...
We analyze bars in sandy rivers when a significant portion of the sediment load is carried in suspension. First, we investigate the ability of a depth-averaged formulation of both the hydrodynamics and sediment transport recently developed for slowly varying flows to capture the main mechanisms of sandbar formation. The exercise turns out to be suc...
![Figure 5: Position of the ’surveyed’ cross-sections [black lines] and...](profile/Domenico-Sguerso/publication/228701243/figure/fig2/AS:302005378666498@1449015101487/Position-of-the-surveyed-cross-sections-black-lines-and-of-three-significant-sections_Q320.jpg)
The main goal of several researches is monitoring the territory, with different survey techniques and analysis methods. Many survey methodologies may be applied to study 3Dimensional variation; generally the choice depends on the application for which the survey is asked, the size of the area, the accuracy and so on.
A typical application is braid...
This paper describes a study to determine sediment transport processes and morphodynamics of the Tanaro River in northwestern Italy to support river management strategies. An integrated hydraulic-geomorphic approach was used to: (a) assess geology, land use and climate controls affecting sediment yield at the catchment scale; (b) evaluate changes i...
Bar instability is recognized as the fundamental mechanism underlying the formation of large-scale forms of rivers. We show that the nature of such instability is convective rather than absolute. Such a result is obtained by revisiting the linear stability analysis of open-channel uniform flow over a cohesionless channel of Colombini et
al. (1987)...
Braided rivers produce flow confluences and divergences (diffluences) in roughly equal numbers, but braided river research has focused mainly on confluences. Divergences, however, are of equal importance dynamically: they are sites of formation of central bars and the development of flow divisions that can steer the flow toward one part of the brai...
The nonlinear study of the phenomena of scour and deposition associated with the propagation of alternate bars of finite amplitude requires the development of numerical codes able to reproduce the mechanism of instability that creates bars. Due to the convective nature of bar instability (Federici &Seminara, 2003), a 2D SWE model has been developed...
Sommario Lo tsunami è un treno d'onde generato in un corpo d'acqua in seguito ad un disturbo improvviso che può derivare principalmente da un forte terremoto, una grande frana, o un'improvvisa attività vulcanica. Le altezze d'onda, irrilevanti al largo, crescono rapidamente quando lo tsunami raggiunge le zone costiere, causando locali e rapidi inna...
