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Geomorphological, pedological, and hydrological characteristics of karst lakes at Conversano (Apulia, southern Italy) as a basis for environmental protection
No full textThe land around Conversano (Apulia, southern Italy) is part of the Murge karst, interesting limestones and dolomitic limestones of Upper Cretaceous age, in a flat environment with sub-horizontal setting. Dolines and karst depressions are the most typical landforms in the area. Filling of these landforms with eluvial deposits locally created the possibility of water stagnancy at the surface. The Conversano territory presents ten karst lakes that represented, until some decades ago, the only water resource available for the local people, who built the typical bell-shaped wells to collect water volumes satisfying local needs during the dry season. Currently, these lakes have no great importance as water supplies, but represent habitats of great naturalistic value that are still able to support the ecological functionality and the wet environments with self-vegetation. Hydrological and hydrogeological studies have been carried out with the aim to fully estimate the related environmental problems. For this purpose, the hydrogeologic data of historical time series have been collected and compared to those of the last 5 years; successively, according to the Thornthwaite method, a hydrological monthly balance has been evaluated to quantify the distribution of water volumes interacting annually between the surface water bodies and the underlying carbonate groundwater. This evaluation has highlighted the need to carefully consider all the parameters concurring to a right definition of water balance for a karst environment, where pedological features, climatic conditions and anthropogenic modifications to the environment represent the elements of a very delicate system. Particularly, on the basis of recent soil map and field surveys, a re-evaluation of the available water capacity, estimated in some 40 mm, has been carried out. The studies have highlighted the need to extend the environmental protection rules to larger areas around the lakes, e.g. at the catchment scale, with definition of buffer zones; in this manner, it will be possible to constantly monitor the protected land and the local anthropogenic activities, that represent real polluting sources for both the surface water resources and the underlying carbonate groundwaters. © Springer-Verlag 2008
Interazione fra epicarpo, acquifero carbonatico e antropizzazione nella Murgia sudorientale (Puglia)
No full textInterventi di riqualificazione ambientale proposti per le aree umide di Torre Guaceto e delle Cesine
No full textAmong the models and the tools of management of the environmental resources proposed by Interreg IIIA Italia - Albania program, that foresees actions of exploitation of wetlands of naturalistic value, there are the Natural Reserves of Torre Guaceto and Le Cesine, in Apulia. Generally the aquatic environments of transition, as those considered, are characterized by a ticklish hydrogeologic equilibrium between fresh waters and salt waters; when this equilibrium slightly cracks, it can be due to the anthropical and natural factor, starts the process of salinization of fresh waters that brings the whole ecosystem to a progressive but inevitable deterioration. In the Natural Reserve of Torre Guaceto the gradual impoverishment of the ground water is united to another great danger constituted by the mouth, in the middle of the reserve, of Canale Reale, manifold of waste water. While in the Natural Reserve of Le Cesine, Canale Campolitano is like as a draining barrier allowing only in the phase of strong recharge a greater flow of the underground waters toward the wetland contributing to crack the equilibrium of fresh and salt waters. So it’s very important the guardianship and the safeguard of these areas
Un nuovo piano di coltivazione per il rilancio dell’attività estrattiva a Cutrofiano (Penisola salentina, Puglia)
No full textThe area of Cutrofiano has always had a mining vocation which, over the time, has first sustained the modest local clay exploitation activity, and then boosted an important production of calcarenite building stones (locally named “tufi”). This last activity developed underground exclusively, and after supporting the local economy for more than a century, owing to the different market and socio-economical conditions, in the last 30 years it has collapsed. On the other hand, lately clay mining has been resumed following to the opening of a big cement factory. Hence, considering the historical background of this mining area and present market conditions, a new exploitation plan is being proposed in order to relaunch said activity. The plan is set out on a double exploitation basis: first the complete clay mining, required by the cement factory, secondly the opencast recovery of calcarenites making up the pillars of the old abandoned underground pits. This will result in the complete exploitation of the mining area with a fairly good income and job creation
Le aree epicarsiche murgiane tra cambiamenti climatici e antropizzazione del territorio: l'area umida di Torre Castiglione, Conversano (Italia)
No full textThis paper deal with one of the lakes included in one of the main karst land of Italy, the Plateau of Murgia, made by Mesozoic carbonatic rocks of Apulian Platform. In this geological context, the Castiglione Lake is collocated: it is about a seasonal lake arising from bottom of a karst depression made impervious by accumulation of continental clay deposits. In the last three years, many hydrological and hydrogeological investigations on the lake and its cathment area have been carried out for studying in depth the knowledge of interactions and influences between surface water body and the underlying carbonatic aquifer. In particular, the analysis of climatic data showed that the last three-years period has been characterised by an increase of yearly average precipitations with summer supplies doubled and a groundwater recharge that represents about 30% of total rains. The chemical and physical analysis of surface waters showed that anthropic polluting phenomenon are negligible. The total dissolved salts range from 210 mg/l to 240 mg/l and is not related to precipitations an dry periods. Also the concentrations of nitrogenous group elements are low and are due to stagnation of surface water
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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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