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Pasquale Filianoti
Dipartimento D.I.C.E.A.M., Università degli Studi Mediterranea di Reggio Calabria, via Salita Melissari, 89124 Reggio Calabria, Italy

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Journal article
Published: 27 January 2021 in Water
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We present an analysis related to the evaluation of Morison and transverse force coefficients in the case of a submerged square barrier subject to the action of solitary waves. To this purpose, two-dimensional experimental research was undertaken in the wave flume of the University of Calabria, in which a rigid square barrier was provided by a discrete battery of pressure sensors to determine the horizontal and vertical hydrodynamic forces. A total set of 18 laboratory tests was carried out by varying the motion law of a piston-type paddle. Owing to the low Keulegan–Carpenter numbers of the tests, the force regime of the physical tests was defined by the dominance of the inertia loads in the horizontal direction and of the lift loads in the vertical one. Through the use of the time series of wave forces and the undisturbed kinematics, drag, horizontal inertia, lift, and vertical inertia coefficients in the Morison and transverse semi-empirical schemes were calculated using time-domain approaches, adopting the WLS1 method for the minimization of the difference between the maximum forces and the linked phase shifts by comparing laboratory and calculated wave loads. Practical equations to calculate these coefficients as a function of the wave non-linearity were introduced. The obtained results highlighted the prevalence of the horizontal forces in comparison with the vertical ones which, however, prove to be fundamental for stability purposes of the barrier. An overall good agreement between the experimental forces and those calculated by the calibrated semi-empirical schemes was found, particularly for the positive horizontal and vertical loads. The analysis of the hydrodynamic coefficients showed a decreasing trend for the drag, horizontal inertia, and lift coefficients as a function of the wave non-linearity, while the vertical inertia coefficient underlined an initial increasing trend and a successive slight decreasing trend.

ACS Style

Francesco Aristodemo; Giuseppe Tripepi; Luana Gurnari; Pasquale Filianoti. Determination of Force Coefficients for a Submerged Rigid Breakwater under the Action of Solitary Waves. Water 2021, 13, 315 .

AMA Style

Francesco Aristodemo, Giuseppe Tripepi, Luana Gurnari, Pasquale Filianoti. Determination of Force Coefficients for a Submerged Rigid Breakwater under the Action of Solitary Waves. Water. 2021; 13 (3):315.

Chicago/Turabian Style

Francesco Aristodemo; Giuseppe Tripepi; Luana Gurnari; Pasquale Filianoti. 2021. "Determination of Force Coefficients for a Submerged Rigid Breakwater under the Action of Solitary Waves." Water 13, no. 3: 315.

Journal article
Published: 06 August 2020 in Sustainability
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Benchmarking techniques are useful and simple tools to analyze the performance of the collective irrigation in the Water User Associations (WUAs) towards an increase in service sustainability. Several benchmarking techniques have been proposed to process and predict performance indicators. Instead, some meaningful statistical techniques based on the distance of data samples, which overcome the limitations of the traditional benchmarking techniques, have never been applied to the collective irrigation sector. This study applies Permutational Multivariate Analysis of Variance (PERMANOVA), Multidimensional Scale Models (MDS), and Distance-Based Linear Models (DISTLM) as benchmarking techniques to evaluate the technical and financial performances of 10 WUAs in Calabria (Southern Italy). These benchmarking techniques revealed that the significant differences in the irrigated areas and financial self-sufficiency of the WUAs, shown by PERMANOVA, depend on the large variability of the remaining performance indicators. Both the MDS and DISTLM demonstrated that a higher number of associated users and larger irrigation service coverage allows an increase in the irrigated areas; this enlargement is facilitated if the water price and the size of the personnel staff decrease. The WUAs’ self-sufficiency is mainly influenced by the number of workers and the maintenance, organization, and management costs, while the impacts of the due service fees and water price are more limited; it is also convenient to increase the number of the associated farmers since this increases the economy of scale and the gross revenues of the irrigation service. Overall, from the analysis carried out for the regional case study, these benchmarking techniques seem to be powerful and easy tools to identify the problems of the irrigation service and help in planning the most suitable policies to improve the sustainability of the collective irrigation at the regional scale.

ACS Style

Demetrio Zema; Pasquale Filianoti; Daniela D’Agostino; Antonino Labate; Manuel Lucas-Borja; Angelo Nicotra; Santo Zimbone. Analyzing the Performances of Water User Associations to Increase the Irrigation Sustainability: An Application of Multivariate Statistics to a Case Study in Italy. Sustainability 2020, 12, 6327 .

AMA Style

Demetrio Zema, Pasquale Filianoti, Daniela D’Agostino, Antonino Labate, Manuel Lucas-Borja, Angelo Nicotra, Santo Zimbone. Analyzing the Performances of Water User Associations to Increase the Irrigation Sustainability: An Application of Multivariate Statistics to a Case Study in Italy. Sustainability. 2020; 12 (16):6327.

Chicago/Turabian Style

Demetrio Zema; Pasquale Filianoti; Daniela D’Agostino; Antonino Labate; Manuel Lucas-Borja; Angelo Nicotra; Santo Zimbone. 2020. "Analyzing the Performances of Water User Associations to Increase the Irrigation Sustainability: An Application of Multivariate Statistics to a Case Study in Italy." Sustainability 12, no. 16: 6327.

Journal article
Published: 15 July 2020 in Hydrology
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In order to predict and control the impacts of floods in torrents, it is important to verify the simulation accuracy of the most used hydrological models. The performance verification is particularly needed for applications in watersheds with peculiar climatic and geomorphological characteristics, such as the Mediterranean torrents. Moreover, in addition to the accuracy, other factors affect the choice of software by stakeholders (users, modellers, researchers, etc.). This study introduces a “performance matrix”, consisting of several evaluation parameters weighted by stakeholders’ opinions. The aim is to evaluate the accuracy of the flood prediction which is achieved by different models, as well as the pros and cons of software user experience. To this aim, the performances and requisites of four physical-based and conceptual models (HEC-HMS, SWMM, MIKE11 NAM and WEC-FLOOD) have been evaluated, by predicting floods in a midsized Mediterranean watershed (Mèsima torrent, Calabria, Southern Italy). In the case study, HEC-HMS and MIKE 11 NAM were the best computer models (with a weighted score of 4.45 and 4.43, respectively), thanks to their low complexity and computation effort, as well as good user interface and prediction accuracy. However, MIKE11 NAM is not free of charge. SWMM showed a lower prediction accuracy, which put the model in third place of the four models. The performance of WEC-FLOOD, although not being as good as for the other tested models, can be considered overall acceptable in comparison to the other well-consolidated models, considering that WEC-FLOOD is in the early stage of development. Overall, the proposal of the performance matrix for hydrological models may represent a first step in building a more complete evaluation framework of the hydrological and hydraulic commercial models, in order to give indications to allow potential users to make an optimal choice.

ACS Style

Pasquale Filianoti; Luana Gurnari; Demetrio Zema; Giuseppe Bombino; Marco Sinagra; Tullio Tucciarelli. An Evaluation Matrix to Compare Computer Hydrological Models for Flood Predictions. Hydrology 2020, 7, 42 .

AMA Style

Pasquale Filianoti, Luana Gurnari, Demetrio Zema, Giuseppe Bombino, Marco Sinagra, Tullio Tucciarelli. An Evaluation Matrix to Compare Computer Hydrological Models for Flood Predictions. Hydrology. 2020; 7 (3):42.

Chicago/Turabian Style

Pasquale Filianoti; Luana Gurnari; Demetrio Zema; Giuseppe Bombino; Marco Sinagra; Tullio Tucciarelli. 2020. "An Evaluation Matrix to Compare Computer Hydrological Models for Flood Predictions." Hydrology 7, no. 3: 42.

Journal article
Published: 27 May 2020 in Water
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Forecasting floods in urban areas during a heavy rainfall is the aim of every early warning system. 2D-models produce the most accurate flood maps, but they are practically useless as quasi real-time tools, because their run times are comparable to times of propagation of floods. Run times of 1D-model are of tens of seconds, but their predictions lack accuracy and many useful indicators of flood severity. Our aim is the identification of the 2D-model map that is more similar to the actual map, chosen among those simulated off-line. To this aim, we produce a rough flood map of the occurring event, through a quasi real-time simulation of the rainfall-runoff using a 1D-model. Then we apply an original method, named “ranking approach”, to perform the best matching. This method is applied to the Corace torrent (Calabria, Southern Italy), using 17 synthetic hyetographs to simulate the same number of rainfall-runoff events, using 1D (SWMM) and 2D (MIKE) models. The method proves to be effective in 65% of the cases, while in 82% of cases (i.e., for 14 cases out 17), the event produced by the same ietograph falls within the third rank.

ACS Style

Pasquale G. F. Filianoti; Angelo Nicotra; Antonino Labate; Demetrio A. Zema. A Method to Improve the Flood Maps Forecasted by On-Line Use of 1D Model. Water 2020, 12, 1525 .

AMA Style

Pasquale G. F. Filianoti, Angelo Nicotra, Antonino Labate, Demetrio A. Zema. A Method to Improve the Flood Maps Forecasted by On-Line Use of 1D Model. Water. 2020; 12 (6):1525.

Chicago/Turabian Style

Pasquale G. F. Filianoti; Angelo Nicotra; Antonino Labate; Demetrio A. Zema. 2020. "A Method to Improve the Flood Maps Forecasted by On-Line Use of 1D Model." Water 12, no. 6: 1525.

Journal article
Published: 27 March 2020 in Energies
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The U-OWC is a caisson breakwater embodying a device for wave energy absorption. Under the wave action, the pressure acting on the upper opening of the vertical duct fluctuates, producing a water discharge alternatively entering/exiting the plant through the U-duct, formed by the duct and the chamber. The interaction between incoming waves and the water discharge alters the wave pressure distribution along the wave-beaten wall of this breakwater compared with the pressure distributions on a vertical pure reflecting wall. As a consequence, the horizontal wave forces produced on the breakwater are also different. A small scale U-OWC breakwater was put off the eastern coast of the Strait of Messina (Southern Italy) to measure the horizontal wave force. Experimental results were compared with Boccotti’s and Goda’s wave pressure formulas, carried out for conventional upright breakwaters, to check their applicability on the U-OWC breakwaters. Both models are suitable for design of U-OWC breakwaters even if they tend to overestimate by up to 25% the actual horizontal loads on the breakwater. Indeed, the greater the absorption of the energy is, the lower the wave pressure on the breakwater wall is.

ACS Style

Pasquale G. F. Filianoti; Luana Gurnari. A Field Experiment on Wave Forces on an Energy-Absorbing Breakwater. Energies 2020, 13, 1563 .

AMA Style

Pasquale G. F. Filianoti, Luana Gurnari. A Field Experiment on Wave Forces on an Energy-Absorbing Breakwater. Energies. 2020; 13 (7):1563.

Chicago/Turabian Style

Pasquale G. F. Filianoti; Luana Gurnari. 2020. "A Field Experiment on Wave Forces on an Energy-Absorbing Breakwater." Energies 13, no. 7: 1563.

Journal article
Published: 06 January 2020 in Energies
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Oscillating water column (OWC) devices, either fixed or floating, are the most common wave energy converter (WEC) devices. In this work, the fluid dynamic interaction between waves and a U-shaped OWC breakwater embedding a Wells turbine has been investigated through unsteady Computational Fluid Dynamic (CFD) simulations. The full-scale plant installed in the harbor of Civitavecchia (Italy) was numerically modeled. A two-dimensional domain was adopted to simulate the unsteady flow, both outside and inside the U-OWC device, including the air chamber and the oscillating flow inside the conduit hosting the Wells turbine. For the numerical simulation of the damping effect induced by the Wells turbine connected to the air chamber, a porous medium was placed in the computational domain, representing the conduit hosting the turbine. Several simulations were carried out considering periodic waves with different periods and amplitudes, getting a deep insight into the energy conversion process from wave to the turbine power output. For this purpose, the three main steps of the overall energy conversion process have been examined. Firstly, from the wave power to the power of the water oscillating flow inside the U-duct. Secondly, from the power of the oscillating water flow to the air pneumatic power. Finally, from the air pneumatic power to the Wells turbine power output. Results show that the U-OWC can capture up to 66% of the incoming wave power, in the case of a wave period close to the eigenperiod of the plant. However, only two-thirds of the captured energy flux is available to the turbine, being partially dissipated due to the losses in the U-duct and the air chamber. Finally, the overall time-average turbine power output is evaluated showing that it is strongly influenced by a suitable choice of the turbine characteristics (mainly geometry and rotational speed).

ACS Style

Luana Gurnari; Pasquale G. F. Filianoti; Marco Torresi; Sergio M. Camporeale. The Wave-to-Wire Energy Conversion Process for a Fixed U-OWC Device. Energies 2020, 13, 283 .

AMA Style

Luana Gurnari, Pasquale G. F. Filianoti, Marco Torresi, Sergio M. Camporeale. The Wave-to-Wire Energy Conversion Process for a Fixed U-OWC Device. Energies. 2020; 13 (1):283.

Chicago/Turabian Style

Luana Gurnari; Pasquale G. F. Filianoti; Marco Torresi; Sergio M. Camporeale. 2020. "The Wave-to-Wire Energy Conversion Process for a Fixed U-OWC Device." Energies 13, no. 1: 283.

Research paper
Published: 18 July 2017 in Journal of Hydraulic Research
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The design of a novel Banki–Michell type turbine, to be located in existing water pipelines, is proposed. The turbine has a very efficient diffuser which allows the turbine to be compact and, most importantly, to have in-line flanges for minimal piping modifications at existing sites. This turbine combines a simple geometry with stable efficiency in a wide range of water discharges. The design procedure estimates the outer diameter of the impeller, its width and the geometry of the diffuser. A series of experimental tests has been carried out to measure the efficiency of the proposed turbine prototype. The turbine was tested in two different configurations, with and without rotational velocity regulation. The results of the tests showed that rotational velocity adaptation improves turbine efficiency in a wide range of flow rates. A significant reduction of the optimal velocity ratio, with respect to the predicted values, is likely due to 3D effects not accounted for in the design procedure. A simple way to roughly estimate this extra energy dissipation is derived from experimental data.

ACS Style

Vincenzo Sammartano; Marco Sinagra; Pasquale Filianoti; Tullio Tucciarelli. A Banki–Michell turbine for in-line water supply systems. Journal of Hydraulic Research 2017, 55, 686 -694.

AMA Style

Vincenzo Sammartano, Marco Sinagra, Pasquale Filianoti, Tullio Tucciarelli. A Banki–Michell turbine for in-line water supply systems. Journal of Hydraulic Research. 2017; 55 (5):686-694.

Chicago/Turabian Style

Vincenzo Sammartano; Marco Sinagra; Pasquale Filianoti; Tullio Tucciarelli. 2017. "A Banki–Michell turbine for in-line water supply systems." Journal of Hydraulic Research 55, no. 5: 686-694.

Journal article
Published: 01 January 2017 in Journal of Hydraulic Engineering
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The potential benefit of coupling hydraulic and electronic regulation to maximize the energy production of a cross-flow turbine in hydraulic plants is analyzed and computed with reference to a specific case. Design criteria of the cross-flow turbine inside hydraulic plants are first summarized, along with the use of hydraulic regulation in the case of constant water head and variable discharge. Optimal turbine impeller rotational speed is derived, and traditional as well as innovative systems for electrical regulation are presented. A case study is analyzed to evaluate the potential energy production according to the expected monthly mean flow distribution and two possible choices: CFT1 with the hydraulic regulation, and CFT2 with coupled hydraulic and electric regulations. The return time of capital investment (RCI), computed for both the solutions, showed that the CFT2 solution provides an increment of the total produced energy, along with an increment of approximately 30% of the corresponding RCI. The sensitivity of the results to water head variability and to possible different pipe design criteria in future scenarios is finally discussed.

ACS Style

Vincenzo Sammartano; Pasquale Filianoti; Marco Sinagra; Tullio Tucciarelli; Giacomo Scelba; Gabriele Morreale. Coupled Hydraulic and Electronic Regulation of Cross-Flow Turbines in Hydraulic Plants. Journal of Hydraulic Engineering 2017, 143, 04016071 .

AMA Style

Vincenzo Sammartano, Pasquale Filianoti, Marco Sinagra, Tullio Tucciarelli, Giacomo Scelba, Gabriele Morreale. Coupled Hydraulic and Electronic Regulation of Cross-Flow Turbines in Hydraulic Plants. Journal of Hydraulic Engineering. 2017; 143 (1):04016071.

Chicago/Turabian Style

Vincenzo Sammartano; Pasquale Filianoti; Marco Sinagra; Tullio Tucciarelli; Giacomo Scelba; Gabriele Morreale. 2017. "Coupled Hydraulic and Electronic Regulation of Cross-Flow Turbines in Hydraulic Plants." Journal of Hydraulic Engineering 143, no. 1: 04016071.

Journal article
Published: 13 May 2016 in Water
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An integrated 1D-2D model for the solution of the diffusive approximation of the shallow water equations, named FLO, is proposed in the present paper. Governing equations are solved using the MArching in Space and Time (MAST) approach. The 2D floodplain domain is discretized using a triangular mesh, and standard river sections are used for modeling 1D flow inside the section width occurring with low or standard discharges. 1D elements, inside the 1D domain, are quadrilaterals bounded by the trace of two consecutive sections and by the sides connecting their extreme points. The water level is assumed to vary linearly inside each quadrilateral along the flow direction, but to remain constant along the direction normal to the flow. The computational cell can share zero, one or two nodes with triangles of the 2D domain when lateral coupling occurs and more than two nodes in the case of frontal coupling, if the corresponding section is at one end of the 1D channel. No boundary condition at the transition between the 1D-2D domain has to be solved, and no additional variable has to be introduced. Discontinuities arising between 1D and 2D domains at 1D sections with a top width smaller than the trace of the section are properly solved without any special restriction on the time step.

ACS Style

Costanza Aricò; Pasquale Filianoti; Marco Sinagra; Tullio Tucciarelli. The FLO Diffusive 1D-2D Model for Simulation of River Flooding. Water 2016, 8, 200 .

AMA Style

Costanza Aricò, Pasquale Filianoti, Marco Sinagra, Tullio Tucciarelli. The FLO Diffusive 1D-2D Model for Simulation of River Flooding. Water. 2016; 8 (5):200.

Chicago/Turabian Style

Costanza Aricò; Pasquale Filianoti; Marco Sinagra; Tullio Tucciarelli. 2016. "The FLO Diffusive 1D-2D Model for Simulation of River Flooding." Water 8, no. 5: 200.

Journal article
Published: 01 January 2016 in Procedia Engineering
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ACS Style

Vincenzo Sammartano; Pasquale Filianoti; Marco Sinagra; Tullio Tucciarelli; Giacomo Scelba; Gabriele Morreale. Coupled Hydraulic and Electronic Regulation for Banki Turbines. Procedia Engineering 2016, 162, 419 -425.

AMA Style

Vincenzo Sammartano, Pasquale Filianoti, Marco Sinagra, Tullio Tucciarelli, Giacomo Scelba, Gabriele Morreale. Coupled Hydraulic and Electronic Regulation for Banki Turbines. Procedia Engineering. 2016; 162 ():419-425.

Chicago/Turabian Style

Vincenzo Sammartano; Pasquale Filianoti; Marco Sinagra; Tullio Tucciarelli; Giacomo Scelba; Gabriele Morreale. 2016. "Coupled Hydraulic and Electronic Regulation for Banki Turbines." Procedia Engineering 162, no. : 419-425.

Journal article
Published: 01 March 2007 in Journal of Waterway, Port, Coastal, and Ocean Engineering
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This technical note shows some results of a small-scale field experiment on Boccotti’s submerged caisson breakwater, which absorbs wave energy and is able to defend a coast with a very small environmental impact. The experiment on the 1:10 scale model of a caisson of this breakwater was carried out on a 2.6-m -deep seabed. All the records of the experiment confirm that it is possible to obtain a strong natural resonance between the random process of wave pressure at the outer opening of the caisson and the random process of oscillations inside the caisson. Finally, a test of the computational algorithm is given by means of the output of the field experiment, and a procedure for tuning the plant is also given.

ACS Style

Felice Arena; Pasquale Filianoti. Small-Scale Field Experiment on a Submerged Breakwater for Absorbing Wave Energy. Journal of Waterway, Port, Coastal, and Ocean Engineering 2007, 133, 161 -167.

AMA Style

Felice Arena, Pasquale Filianoti. Small-Scale Field Experiment on a Submerged Breakwater for Absorbing Wave Energy. Journal of Waterway, Port, Coastal, and Ocean Engineering. 2007; 133 (2):161-167.

Chicago/Turabian Style

Felice Arena; Pasquale Filianoti. 2007. "Small-Scale Field Experiment on a Submerged Breakwater for Absorbing Wave Energy." Journal of Waterway, Port, Coastal, and Ocean Engineering 133, no. 2: 161-167.