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Your search keyword '"Lucianetti, Giorgia"' showing total 2 results
Start Over Author "Lucianetti, Giorgia" Topic alpine hydrogeology
2 results on '"Lucianetti, Giorgia"'

1. Understanding groundwater storage and drainage dynamics of a high mountain catchment with complex geology using a semi-distributed process-based modelling approach.

Author

Chen, Zhao, Lucianetti, Giorgia, and Hartmann, Andreas

Subjects
*GEOLOGY, *HYDROGEOLOGY, *BEDROCK, *HYDROGEOLOGICAL modeling, *GROUNDWATER, *UNDERGROUND storage, *MICROGRIDS
Abstract

• We developed a new semi-distributed hydrological model for a high mountain catchment with complex hydrogeology. • The model structure incorporates both the bedrock aquifer in the mountain block and the porous aquifer at the valley floor. • The model provides a better understanding of the collective behavior of the bedrock and porous aquifers. • We developed a multi-step model evaluation workflow to identify weakness in the model structure. Mountainous groundwater systems are usually characterized by great geological complexity and highly heterogeneous hydraulic properties. For that reason, proper system characterization, monitoring and modelling remain challenging. In this study, we investigated a geologically complex alpine catchment (from 1400 to 2900 m asl) in the Dolomites (Italian Alps) by combining hydrogeological field investigation, hydrological monitoring and modelling. A semi-distributed process-based hydrological model was applied to simulate the continuous measured catchment discharge in a period of three years, which covers a large variation of hydrodynamic conditions. The model structure couples the sequential hydrogeological units within the studied catchment: (1) the fractured dolomitic rocks as bedrock aquifer and 2) the unconsolidated deposits accumulating on the slopes and at the valley floor as porous aquifer. In order to evaluate the model structure and parameterization in depth, we applied a multi-step evaluation approach considering both parameter sensitivity and uncertainty. The modelling results demonstrate that the newly developed model can reproduce most discharge behavior of aquifers. The model indicates a seasonal dynamic linkage between surface and subsurface storage units during different flow conditions. Besides the matrix and conduit flow in fractured dolomitic aquifer, it highlights the important role of unconsolidated sediments (porous aquifer) to the storage and discharge behavior of the entire groundwater system. Furthermore, with the comprehensive model evaluation we learned the model performance deficit during extreme high flow conditions and proposed a more detailed hydrogeological conceptual model. We believe that the proposed modelling approach can be transferred to other high mountain catchments with similar hydro(geo)logical characteristics to characterize the collective behavior of aquifer systems, explore conceptual model weakness and optimize catchment monitoring work. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Preliminary conceptual model of an Alpine carbonate aquifer (Pale di San Martino, Dolomites, Italy)

Author

Roberto Mazza, Lucia Mastrorillo, Giorgia Lucianetti, Lucianetti, Giorgia, Mastrorillo, Lucia, and Mazza, Roberto

Subjects
Pale di San Martino, Environmental Engineering, 0208 environmental biotechnology, Karst, Aquifer, 02 engineering and technology, 010502 geochemistry & geophysics, 01 natural sciences, Dolomites, karst, alpine hydrogeology, conceptual model, Dolomites, Pale di San Martino, Streamflow, Environmental Chemistry, 0105 earth and related environmental sciences, Water Science and Technology, Hydrology, geography, Hydrogeology, geography.geographical_feature_category, Alpine hydrogeology, lcsh:QE1-996.5, Groundwater recharge, Geotechnical Engineering and Engineering Geology, 020801 environmental engineering, lcsh:Geology, Water resources, Geophysics, Conceptual model, Carbonate rock, Geology, Groundwater
Abstract

A hydrogeological and hydrochemical monitoring was conducted in the Pale di San Martino mountain ridge (Trento and Belluno Provinces, Italy) to build a preliminary conceptual model of the groundwater system. The model derives from a combination of new fieldwork and preexisting data provided by various public authorities. New data include geological and hydrogeological surveys, such as in situ measurements of the physical and chemical parameters, geochemical sampling and streamflow measurements. The lithologies outcropping in the area were grouped into seven hydrogeological complexes, each playing a different role in groundwater circulation. The dolomitic body of the ridges forms the main aquifer complex and is located above a terrigenous and evaporitic aquiclude. Due to this geometrical relationship, the site can be considered an isolated hydrostructure with well-defined no-flow boundaries. The main springs outcome near the aquifer-aquiclude boundary and in particular where the elevation of the contact is low and the tectonic pattern favors the drainage. Most of them have a calciumbicarbonate water composition, low temperature and low electrical conductivity, supporting the hypothesis of a fast flowing circulation in carbonate rocks and a high-altitude recharge. Seasonal streamflow measurements allowed the identification of linear springs and provided the first cumulative discharge data at the scale of the entire mountain group. The resulting model highlights a great spatial and temporal variability of the groundwater resources. Considering the geometry of the aquifer and the great seasonal variability of the discharge, it is possible to infer the absence of significant groundwater reserves at a regional scale. Thus, the hydrostructure shows a great capacity to supply water resources (mean discharge of 6 m3/s), but a low selfregulation capacity. It is necessary to consider this aspect when planning a long-term exploitation of the water resources that are used in the area for drinking purposes and hydropower generation.

Published
2016

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