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Analisi Evolutiva del Sistema Spiaggia-Duna in Emilia-Romagna: Processi Morfodinamici e Trasporto Eolico
No full textSeveral studies have been carryout to highlight the scientific community about the importance of coastal
beach-dune system in coastal dynamics recognizing. Their ecological and environmental value is very
important, they play a fundamental rule in coastal defense protecting hinterland from flooding with their
raised morphology, contrasting the salt wedge’s intrusion with their water table and moreover they constitute
an important reservoir of sand for beaches
This aspect in the Emilia-Romagna region seems to be particularly important: many coastline features are
characterized by emergency conditions because they are exposed more frequently and dangerously to
phenomena of submersions for sea storm’s events and to a diffuse and intense marine erosion.
Actually, along 130 km of the Emilia-Romagna coastline, 29 km are characterized by the presence of coastal
dunes, of which, approximately 9,5 km belong to the province of Ferrara, approximately 18 km to Ravenna’s
and remaining to the more to south coastal part of the region.
In this paper the results of a regional research are presented trough the application of a methodological
integrated approach (System’s Theory), that aims to analyze and to point out the evident morphoevolutionary
state of crisis in which the Emilia Romagna dunes today are (2008). Another objective is to try to optimize
the management’s policies of natural sedimentary resources, which are today very important for the new
philosophical approaches to coastal problems. The final result is a tool able to supply indications about the
priorities to front and the actions methodologies finalized to the safeguard and the defense of these delicate
environmental subsystems.
It becomes fundamental to have the correct perception of the phenomena in action and to quantify the
“weight” that the several morphodynamic’s agents have in the coastal dune system’s evolution. The
parameterization of such factors, the spatial analysis, the multi-scale and temporal analysis (from 2000 to
today) helps us to identify the relations of mutual interaction between such parameters. Therefore, it’s
possible to extract an Instability beach-Dune system Index (IDI) to establish the state of system’s instability,
and a space-temporal variability allowing their possible future evolution forecasting. Among all the factors,
the anthropic impact of the several tourist activities on the management of coastal spaces, in the Emilia
Romagna region seems to be the most important: only for the province of Ferrara, for example, from 2000 to
today, the areas lacking in vegetation developed on dunes, have increased of approximately 11%. The
majority have become unvegetated ground knots (blowouts), full of recreational structures, or transformed in
tourist’s beaches.
Through the overlap of several classes of land cover distributions (change detection), it is possible to gain
important indications on the dunes erosive trends: of the 9,5 km of the Ferrara’s dune’s coastal strip,
nowadays approximately 4,2 km, is developed through an erosion escarpment with height greater than 1m.
This demonstrates that the exposure to wave action is intense and frequent. In these cases the processes can
reach to abrupt accelerations, till to assume speed and various intensities also from point to point for a same
system; in a short time, the opening of crosses and the development of blowouts can put in crisis the whole
dune’s system and expose the inlands to a risk. In 11 cases on 23, the front beach highlights an erosion trend
and the width is less then 20m with the dune’s foot which is often constituted by temporary accumulation
generated by landslides of the erosion walls.
Therefore, this job has been integrated with a study on the wind’s “potentialities” to contribute to the
maintenance and/or the development of dunes, by applying a conceptual model (Kadib, 1983; Bagnold,
1941) that allows to gain an annual potential sedimentary budget for each system, in relation to the medium
climate and to the morphological and sedimentary characteristics of the system. Such aspect can supply
important indications during all the steps of a coastal action, beginning from the planning and realization of
sedimentary traps, till their positioning and direction. Moreover, the obtained results above all demonstrate
as such methodological approach can represent a real, useful, regional scale instrument to all policies of
coastal land management, to the research on new technical of actions or to program and optimize the
resources
Mobile mapping system for historic built heritage and GIS integration: a challenging case study
Get PDFAbstract
To manage the historic built heritage, it is of fundamental importance to fully understand the urban area under study, so that all its characteristics and critical issues related to historical conformation, stratifcation, and transformations can be better understood and described. Geometric surveying allows a deeper investigation of these characteristics through analytical investigation in support of urban planning theories as well. To date, geomatics provides various tools and techniques to meet the above-mentioned needs, and mobile mapping system (MMS) is a technology that can survey large areas in a short time, with good results in terms of density, accuracy, and coverage of the data. In this context, the article aims to verify whether this approach can also be useful in the complex and stratifed reality of the historic urban context. The case analyzed—the historical center of Sabbioneta—presents some criticalities found in many urban centers of historical layout. Examples are narrow streets inserted in an urban context with multi-story buildings and consequent difculty in receiving the GNSS signal and difculty in following general MMS survey guidelines (trajectories with closed loops, wide radius curves). The analysis presented, relating to a survey carried out with Leica Pegasus:Two instrumentation, in addition to describing the strategies used to properly develop the survey, aims to analyze the resulting datum by discussing its possibilities for use in urban modeling, for cartographic or three-dimensional information modeling purposes. Particular attention is paid to assessing whether the quality of the data (accuracy, density) is suitable for the urban scale. Finally, an analysis of the data obtained from MMS was made with the geographic-topographic database (DBGT), in a GIS (Geographic Information System) environment, to check the possibilities of use and integration between the two models
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Protezione della costa attraverso interventi di ripristino di dune sui litorali del Faro di Gorino e Lido delle Nazioni (Emilia-Romagna).
No full textIntervento di ripristino dell’efficienza della bocca secondaria della Sacca di Goro (Delta del Po).
No full text
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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