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Cerreto d'Esi, Italy

Piccinini L.,University of Padua | De Nardo M.T.,Servizio Geologico | Filippini M.,University of Bologna | Segadelli S.,Servizio Geologico | And 2 more authors.
Geoingegneria Ambientale e Mineraria

The paper deals about the mapping of contribution and well-head protection areas for springs discharging out from non karstic fractured aquifers. In the specific case we refer to mainly sedimentary hard rock aquifers occurring in Northern Apennines (Italy): They are represented by turbidites and arenites, and by ophiolites at a lower extent, characterized by high heterogeneity and anisotropy in the hydraulic conductivity distribution. Groundwater flow numerical modeling, by the adoption of Equivalent Porous Medium (EPM) approach, is presented as the most suited and robust tool in order to locate, according to a physically based approach, contribution and protection areas of springs; the main mandatory prerequisites are the availability of a reliable geological model derived from a detailed geological survey of the area and the occurrence of multi-year time series of continuous monitoring of spring discharge. The presented case study is about a main public water supply spring and, at the same time, a Groundwater Dependent Ecosystems (GDE) of paramount importance in the area. The application is preceded by a review of different methodologies employed to map non karstic spring contribution and protection areas, updated with recent references. The recharge area derived by numerical modeling has an extension of about 2.40 km2, this area produces an average spring flow rate of 12.43 l/s. Spring protection areas were defined by the envelop of the 60 days and 365 days travel times. Their extensions are, respectively, 1.6% and 11.4% of the recharge area. Finally, the infiltration coefficient, above the contribution area, resulted equal to 17%. At the end of the article a hybrid methodology to map contribution and protection areas of springs in a mountainous non karstic setting is proposed. Source

Herewith is presented a phytosociological detailed study of the vegetation of a pre-Apennines area in the Marche's region, named Pescacci, in the town of Serra San Quirico (AN) affected by a large landslide known since the middle of the eighteenth century. The detailed historical geomorphological analysis allows to evaluate the changes that have occurred over time that have created a high diversity of habitats and microhabitats. The integrated analysis conducted confirm the close relationship between vegetation and geomorphology and the high value of plant associations as ecological indicators. We describes two new associations of plain and riparian vegetation, respectively known as: Salici apenninae-Fraxinetum oxycarpae and Rubo caesii-Populetum canescentis, vicarious in the pre-Apennines and infra-Apennines territories of the sub-Mediterranean associations already described. The phytosociological analysis of detail also made it possible to describe the new association Scabioso maritimae-Hedysaretum coronarii for the pioneer vegetation which occupies the landslide slopes, in addition to other new syntaxa. The identification of the dynamic relationships between the different plant communities found, made it possible to reconstruct the main vegetation series from which integration result the landscape vegetation units of the investigated area. © Società Italians di Fitosociologia. Source

We present here a case study of the application of vegetational and geomorphological analyses as good methodology for the identification of habitats according to Directive 92/43/CEE. ThIS study relates to a biotope known as "Pian delle Melette", which is included in SICIT5210066 "Media Val Casana (Monti Coscerno-Civitella)", and it is realised through an integrated geomorphological and phytosociological approach. The results of this study have allowed its high phytocoenotic diversity to be revealed, which distinguishes this small biotope and increases the knowledge of this Site of Community Importance, recognising two habitats of community interest that have not been described in the previous habitat 6510 "Lowland hay meadows (Alopecurus pratensis, Sanguisorba officinalis)" represented by the associations: Ranunculo neapolitani-Arrhenatheretum elatioris subass. ranunculetosum velutini and Centaureo neapolitanae-Arrhenatheretum elatioris ass. nova hoc. loco and the habitat 91LO "Illyrian oak-hornbeam forests (Erythronio-Carpinion)" with Acer pseudoplatanus and Allium ursinum community. The analyses carried out are, moreover, to be considered of fundamental importance in that they identify the dynamic and chain relationships between the various communities that are fundamental elements for the conservation phase of the whole system through informed management, such that it can take into account the patterns of the communities in the area investigated. It is on this basis that it is necessary to plan the conservational management of these habitats and of the entire landscape that these define. © Società Italiana di Fitosociologia. Source

Piccinini L.,University of Padua | Vincenzi V.,Geologo Libero Professionista | Pontin A.,Geologo Libero Professionista | Andreella G.,Ingegnere Libero Professionista | D'Agostini S.,Responsabile della Direzione
Geoingegneria Ambientale e Mineraria

Tunnels and underground excavations can induce groundwater drainage, depending on the hydrogeological properties of the involved medium. Groundwater drainage, especially when unforeseen during the design phase, can represent a major issue during drilling operations, precluding the safety conditions. This study presents the results of a three-dimensional numerical model with the code FEFLOW®, which aimed to predict the tunnel inflows induced by a road tunnel drilled in a fractured rock mass (a turbidite, i.e. Flysch di Belluno Formation, Eocene). The simulations were implemented by means of the hydrogeological monitoring data collected during and after the drilling phase and were used to design the final drainage system of the tunnel. Simulations results allowed estimating the maximum groundwater drainage rate during the extreme hydrological events (rainfall with return period of 500 years). Source

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