Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"Settore ICAR/01 - Idraulica"”.
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Eco-hydraulic quantication of hydropeaking and thermopeaking: development of modeling and assessment tools
River reaches worldwide historically experience morphological regulations, as channelization, as well as flow regime alterations, which often lead to degradation of freshwater ecosystems. In last seven decades a large number of dams have been designed and built worldwide contributing to such river …
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Managing complexity in high-concentration flow modelling aimed at hazard assessment: numerical and practical aspects
… et al. (2009b) and in Rosatti and Begnudelli (2013a), which is implemented in the TRENT2D model. TRENT2D is a quite sophisticated model that solves a system of Partial Differential Equations over a Cartesian mesh by means of a finite-volume method with Godunov-type fluxes. By means of TRENT2D, …
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Effects of artificial light at night on benthic primary producers in freshwaters
In recent decades, the use of artificial nocturnal illumination has rapidly increased worldwide, imposing an increase of nocturnal light levels and a disruption of natural cycles of light and dark that have been stable over geological and evolutionary time scales. This wide-spread alteration of the …
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Long term morphodynamics of alternate bars in straightened rivers: a multiple perspective
Alpine rivers have been regulated to claim productive land in valley bottoms since the last two centuries. Width reduction and rectification often induced the development of regular scour-deposition sequences, called alternate bars, with implications for flood protection, river navigation, …
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Long-term morphological response of tide dominated estuaries
Most estuaries of the world are influenced by tides. The tidal action is a fundamental mechanism for mixing river and estuarine waters, resuspending and transporting sediments and creating bedforms. The planform of tide-dominated estuaries is characterized by a funnel-shaped geometry with a high …
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Multi-decadal morphodynamics of alternate bars in channelized rivers: a multiple perspective
Alpine rivers have been regulated to claim productive land in valley bottoms since the last two centuries. Width reduction and rectification often induced the development of regular scour-deposition sequences, called alternate bars, with implications for flood protection, river navigation, …
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Interaction among vegetation and morphology in channelized rivers
The presence of aquatic vegetation on riverbed and embankments influences flow structure and consequently flow resistance, sediment transport, morphology, and ecology. These influences would lead to a hydraulic diversity, which is a key ingredient of physical habitat in streams. According to this …
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Downstream suspended sediment dynamics of reservoir sediment flushing
Reservoir sediment flushing is increasingly considered beneficial to reduce sedimentation of reservoirs and maintain sediment supply downstream of impounded rivers. Nevertheless, flushing of the accumulated sediments downstream of the dam also bears numerous negative impacts. In this study, first …
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Two-phase modelling of debris flow over composite topography: theoretical and numerical aspects
In the mountain territory the majority of the population and of the productive activities are concentrated in the proximity of torrents or over alluvial fans. Here, when intense rainfall occurs, debris flow or hyper-concentrated flow events can produce serious problems to the population with …
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Effects of rigid stems on sediment transport
The vegetation is an important factor of quality of the river ecosystem, given its capability to contribute to the chemical, biological and physical quality of water. On the other hand, the presence of vegetation in riverbed modifies flow structure, flow resistance, sediment transport and …
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Air pollution modelling over complex topography
The present study deals with air pollution modelling over complex topography, both from the phenomenological and numerical point of view. The theme of air pollution modelling has been faced at first from a phenomenological point of view. Then a numerical approach for the resolution of the …
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Hydrothermodynamics of a small alpine lake
La presente ricerca è volta a indagare le proprietà idrotermodinamiche dei laghi alpini, con particolare riferimento al caso del lago di Tovel (Trentino, Italia). Tale lago era noto a livello internazionale a causa di unospettacolare fenomeno di arrossamento che si verificava ogni anno fino al …
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Mechanics and numerical simulations of Dry Granular Flows driven by gravity
The gravitational granular flows (e.g. debris flows or snow avalanches) are catastrophic and destructive phenomena affecting many areas in the world, and especially the mountain areas of Europe. Proper design criteria are required in order to improve protection structures and prevention strategies. …
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Modelling the morphodynamics of tidal channels
The present study deals with the morphodynamics of rivers and estuaries. The morphodynamic behaviour of natural systems has been investigated using numerical tools. As a first step the hydrodynamics and morphodynamics of both convergent and non-convergent tidal channels have been studied. The …
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River - Riparian Vegetation Interactions
The river and the riparian ecosystem are two dynamical systems which exhibit complex spatio-temporal interactions. Because of the possible implications for engineering works and environmental management, in recent times a number of studies has focused on this topic, considering both large- and …
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Mediterranean Myth: from a colonial paradigm into a branding icon.
Objective: The thesis aims to find out how the Mediterranean developed from a negative colonial concept into a robust positive identity that is being employed in branding and advertising for multiple purposes. Problematic: While a great deal of information has been gleaned about the Mediterranean …
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Disclose river morphodynamics processes through experiments
… Mars (2 km wide channel) (after Kleinhans (2010)). Introduction 5 theoretical advances risk to provide models that, even though mathematically refined, are not useful to resolve practical fluvial problems. It follows that a correct mix of field observation, experiments, and theories can be …
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Eco-hydro-morphodynamics and ecosystem services of near-natural river corridors
Near-natural river corridors (NNRs) provide crucial habitat for a host of biota and support the survival of people and nature worldwide at multiple spatiotemporal scales. Furthermore, NNRs represent fundamental references for river conservation, management, and restration, offering the opportunity …
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Flow and thermal regimes in river networks: effects of hydropower regulation and climate extremes
Interactive impacts of climate change and human activities (e.g. hydropower production) have posed urgency in examining the patterns of hydrological and thermal response in riverine ecosystems, and the potential ecological implications manifested. Hydro-geomorphic conditions are the major factors …
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Enhancement of wastewater and sludge treatment processes by hydrodynamic cavitation
In the past decades, hydrodynamic cavitation (HC) process was the subject of study by many researchers worldwide. This phenomenon was widely studied in order to understand the reason of its negative effects on hydraulic machinery such as pumps,turbines, valves, etc. Many efforts were made in order …
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