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Dr. Maurizio Giugni
Department of Civil, Architectural and Environmental Engineering, Università di Napoli Federico II, via Claudio, 21, Napoli 80125, Italy

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Research Keywords & Expertise

0 Energy Recovery
0 Hydropower
0 Water distribution networks
0 PaT
0 Pressure management

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Water distribution networks
Hydropower
PaT
Pressure management
Energy Recovery

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Journal article
Published: 30 June 2021 in Renewable Energy
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The pursuit of Best Management Practices (BMPs) for pressurized water systems has intensified interest in Pumps As Turbines (PATs), given that PAT use enables coupling of pressure regulation with small-scale hydropower generation. Installing PATs instead of micro-turbines provides for several advantages, such as cheaper procurement and maintenance costs, and importantly, the ability to select the most reliable model from among a wide variety of devices available in the market. Nevertheless, the current state of knowledge regarding PAT performance leaves out critical aspects that remain to be adequately addressed, especially for some models, such as centrifugal vertical axis multi-stage pumps running in reverse mode, despite such devices having attractive features that offer particularly advantageous benefits when high head in the system is exploitable. In contributing key experimental findings on four vertical multi-stage (single-, two-, three-, and four-stage) PATs, this paper thus extends the performance related knowledge about vertical multi-stage PATs: prior models from the literature are demonstrated to reliably predict performance, with the contribution additionally consisting in assessing performance dependence on number of pump stages. The results showed both head and power to be highly correlated with the variable number of stages, especially for predicting PAT characteristics at the Best Efficiency Point (BEP) for multi-stage models. However, the single-stage model exhibited slightly lower performance values.

ACS Style

Francesco Pugliese; Nicola Fontana; Gustavo Marini; Maurizio Giugni. Experimental assessment of the impact of number of stages on vertical axis multi-stage centrifugal PATs. Renewable Energy 2021, 178, 891 -903.

AMA Style

Francesco Pugliese, Nicola Fontana, Gustavo Marini, Maurizio Giugni. Experimental assessment of the impact of number of stages on vertical axis multi-stage centrifugal PATs. Renewable Energy. 2021; 178 ():891-903.

Chicago/Turabian Style

Francesco Pugliese; Nicola Fontana; Gustavo Marini; Maurizio Giugni. 2021. "Experimental assessment of the impact of number of stages on vertical axis multi-stage centrifugal PATs." Renewable Energy 178, no. : 891-903.

Journal article
Published: 05 March 2021 in Water Resources Research
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Natural riparian vegetation generally presents a complex hydrodynamic behavior governed by plant morphology and flexibility. By contrast, hydrodynamic processes in partly vegetated channels are conventionally simulated by using simplified model vegetation, such as arrays of rigid cylinders. The aim of this study is to investigate the impacts of embedding natural plant features in the experimental simulation of flow in partly vegetated channels. Unique comparative experiments were carried out with both reconfiguring vegetation made of natural‐like shrubs and grasses, and with rigid cylinders. While the lateral distributions of flow properties presented a high similarity governed by the shear layer differential velocity ratio, the bulk vegetative drag, and the presence of large‐scale vortices, the flexibility‐induced mechanisms of natural‐like vegetation markedly affected the flow at the interface. Differences in plant morphology and spacing, and the dynamic motion of flexible foliated plants induced deeper vortex penetration into the vegetation. The normalized shear penetration was 6‐10 times greater than observed for rigid cylinders, resulting in wider zones significantly exchanging momentum with the adjacent open water. The efficiency of lateral momentum transport for flexible foliated vegetation was up to 40% greater than the corresponding rigid cylinder case. Overall, the results indicated that improving the representativeness of model vegetation is a critical step toward the accurate simulation of hydrodynamic and transport processes in natural settings.This article is protected by copyright. All rights reserved.

ACS Style

Gerardo Caroppi; Kaisa Västilä; Paola Gualtieri; Juha Järvelä; Maurizio Giugni; Paweł M. Rowiński. Comparison of Flexible and Rigid Vegetation Induced Shear Layers in Partly Vegetated Channels. Water Resources Research 2021, 57, 1 .

AMA Style

Gerardo Caroppi, Kaisa Västilä, Paola Gualtieri, Juha Järvelä, Maurizio Giugni, Paweł M. Rowiński. Comparison of Flexible and Rigid Vegetation Induced Shear Layers in Partly Vegetated Channels. Water Resources Research. 2021; 57 (3):1.

Chicago/Turabian Style

Gerardo Caroppi; Kaisa Västilä; Paola Gualtieri; Juha Järvelä; Maurizio Giugni; Paweł M. Rowiński. 2021. "Comparison of Flexible and Rigid Vegetation Induced Shear Layers in Partly Vegetated Channels." Water Resources Research 57, no. 3: 1.

Article
Published: 01 March 2021 in Water Resources Management
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Assessing the impact of climate change on water demand is a challenging task. This paper proposes a novel methodology that quantifies this impact by establishing a link between water demand and weather based on climate change scenarios, via Coupled General Circulation Models. These models simulate the response of the global climate system to increasing greenhouse gas concentrations by reproducing atmospheric and ocean processes. In order to establish the link between water demand and weather, Random Forest models based on weather variables were used. This methodology was applied to a district metered area in Naples (Italy). Results demonstrate that the total district water demand may increase by 9–10% during the weeks with the highest temperatures. Furthermore, results show that the increase in water demand changes depending on the social characteristics of the users. The water demand of employed users with high education may increase by 13–15% when the highest temperatures occur. These increases can seriously affect the capacity and operation of existing water systems.

ACS Style

Diana Fiorillo; Zoran Kapelan; Maria Xenochristou; Francesco De Paola; Maurizio Giugni. Assessing the Impact of Climate Change on Future Water Demand using Weather Data. Water Resources Management 2021, 35, 1449 -1462.

AMA Style

Diana Fiorillo, Zoran Kapelan, Maria Xenochristou, Francesco De Paola, Maurizio Giugni. Assessing the Impact of Climate Change on Future Water Demand using Weather Data. Water Resources Management. 2021; 35 (5):1449-1462.

Chicago/Turabian Style

Diana Fiorillo; Zoran Kapelan; Maria Xenochristou; Francesco De Paola; Maurizio Giugni. 2021. "Assessing the Impact of Climate Change on Future Water Demand using Weather Data." Water Resources Management 35, no. 5: 1449-1462.

Editorial
Published: 22 November 2020 in Water
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The larger anthropic pressure on the Water Supply Systems (WSS) and the increasing concern for the sustainability of the large energy use for water supply, transportation, distribution, drainage and treatment are determining a new perspective in the management of water systems

ACS Style

Armando Carravetta; Maurizio Giugni; Stefano Malavasi. Application of Innovative Technologies for Active Control and Energy Efficiency in Water Supply Systems. Water 2020, 12, 3278 .

AMA Style

Armando Carravetta, Maurizio Giugni, Stefano Malavasi. Application of Innovative Technologies for Active Control and Energy Efficiency in Water Supply Systems. Water. 2020; 12 (11):3278.

Chicago/Turabian Style

Armando Carravetta; Maurizio Giugni; Stefano Malavasi. 2020. "Application of Innovative Technologies for Active Control and Energy Efficiency in Water Supply Systems." Water 12, no. 11: 3278.

Journal article
Published: 01 July 2020 in Journal of Water Resources Planning and Management
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In recent years, power generation has been coupled with pressure regulation to optimize management of water distribution networks, also showing attractive revenues and short payback periods. A recent study proposed a prototype that performs both electric and hydraulic regulation for pressure regulation and hydropower generation in a water distribution network, wherein laboratory experiments showed the effectiveness of the control algorithms and the prototype’s capability in regulating pressure at the desired set-point value while optimizing power production. However, the prototype uses needle valves for flow and pressure regulation, whereas hydraulically operated pressure-reducing valves (PRVs) can be more effective for pressure regulation. Moreover, such PRVs require much less power for operation, thus proving more reliable in case of electrical blackout. Consequently, a different prototype was proposed, which uses hydraulically operated PRVs instead of needle valves. This paper discusses the control algorithm of the system to achieve pressure regulation and optimal power generation. A proportional integral controller was used for PRV control, whereas the inverter control was performed by means of both an external optimization module and dimensionless variables. Laboratory experiments confirmed the effectiveness of the proposed approach and pointed out the effect of the gains on the process dynamics.

ACS Style

Nicola Fontana; Maurizio Giugni; Luigi Glielmo; Gustavo Marini; Raffaele Zollo. Use of Hydraulically Operated PRVs for Pressure Regulation and Power Generation in Water Distribution Networks. Journal of Water Resources Planning and Management 2020, 146, 04020047 .

AMA Style

Nicola Fontana, Maurizio Giugni, Luigi Glielmo, Gustavo Marini, Raffaele Zollo. Use of Hydraulically Operated PRVs for Pressure Regulation and Power Generation in Water Distribution Networks. Journal of Water Resources Planning and Management. 2020; 146 (7):04020047.

Chicago/Turabian Style

Nicola Fontana; Maurizio Giugni; Luigi Glielmo; Gustavo Marini; Raffaele Zollo. 2020. "Use of Hydraulically Operated PRVs for Pressure Regulation and Power Generation in Water Distribution Networks." Journal of Water Resources Planning and Management 146, no. 7: 04020047.

Journal article
Published: 24 March 2020 in Water
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This paper presents a comparison between two procedures for the generation of water demand time series at both single user and nodal scales, a top-down and a bottom-up procedure respectively. Both procedures are made up of two phases. The top-down procedure adopted includes a non-parametric disaggregation based on the K-nearest neighbours approach. Therefore, once the temporal aggregated water demand patterns have been defined (first phase), the disaggregation is used to generate water demand time series at lower levels of spatial aggregation (second phase). In the bottom-up procedure adopted, demand time series for each user and for each time step are generated applying a beta probability distribution with tunable bounds or a gamma distribution with shift parameter (first phase). Then, a Copula based re-sort is applied to the demand time series generated to impose existing rank cross-correlations between users and at all temporal lags (second phase). For the sake of comparison, two case studies were considered, both of which are related to a smart water network in Naples (Italy). The results obtained show that the bottom-up procedure performs significantly better than the top-down procedure in terms of rank-cross correlations at fine scale. However, the top-down procedure showed a better performance in terms of skewness and rank cross-correlation when the aggregated demands were considered. Finally, the level of aggregation in nodes was found to affect the performance of both the procedures considered.

ACS Style

Diana Fiorillo; Enrico Creaco; Francesco De Paola; Maurizio Giugni. Comparison of Bottom-Up and Top-Down Procedures for Water Demand Reconstruction. Water 2020, 12, 922 .

AMA Style

Diana Fiorillo, Enrico Creaco, Francesco De Paola, Maurizio Giugni. Comparison of Bottom-Up and Top-Down Procedures for Water Demand Reconstruction. Water. 2020; 12 (3):922.

Chicago/Turabian Style

Diana Fiorillo; Enrico Creaco; Francesco De Paola; Maurizio Giugni. 2020. "Comparison of Bottom-Up and Top-Down Procedures for Water Demand Reconstruction." Water 12, no. 3: 922.

Proceedings
Published: 01 January 2020 in Environmental Sciences Proceedings
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In mountain areas, natural hazards, e.g., flooding, snow avalanches, droughts, and landslides are triggered by climate change, anthropization, and economic development. Nature-Based Solutions (NBSs) are attracting increasing interest as they are able to couple technical solutions against natural hazards with ecological and socio-economic resilience. On this matter, the four-year H2020 Innovation Action “PHUSICOS—According to Nature” (Grant Agreement nr. 776681) project aims to assess the effectiveness of NBSs and hybrid solutions to hinder hydro-meteorological events in rural and mountainous areas in Europe. Among the ongoing activities within the project, a multi-criteria tool was implemented to assess the effectiveness of NBSs measures from the technical, environmental, and socio-economic perspectives. In this work, the preliminary application of the assessment tool to the Isar River (DE) PHUSICOS concept case is discussed, with reference to an ex-post analysis of the flood risk management plan, comparing the performances of the implemented NBS project scenario against a potential grey solution.

ACS Style

Francesco Pugliese; Gerardo Caroppi; Aude Zingraff-Hamed; Gerd Lupp; Maurizio Giugni. Nature-Based Solutions (NBSs) Application for Hydro-Environment Enhancement. A Case Study of the Isar River (DE). Environmental Sciences Proceedings 2020, 2, 2030 .

AMA Style

Francesco Pugliese, Gerardo Caroppi, Aude Zingraff-Hamed, Gerd Lupp, Maurizio Giugni. Nature-Based Solutions (NBSs) Application for Hydro-Environment Enhancement. A Case Study of the Isar River (DE). Environmental Sciences Proceedings. 2020; 2 (1):2030.

Chicago/Turabian Style

Francesco Pugliese; Gerardo Caroppi; Aude Zingraff-Hamed; Gerd Lupp; Maurizio Giugni. 2020. "Nature-Based Solutions (NBSs) Application for Hydro-Environment Enhancement. A Case Study of the Isar River (DE)." Environmental Sciences Proceedings 2, no. 1: 2030.

Journal article
Published: 01 January 2019 in Journal of Hydraulic Engineering
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Strategies to reduce leakage based on integrated systems of monitoring and management of the pressure levels and related anomalies are acknowledged as the most reliable and cost-effective techniques to improve the efficiency of water networks. Because of their relevant impact at the large scale and the crucial roles currently played by programs envisaging ideas of smart cities capable to control/solve problems of homeland security and prevention and early monitoring of disasters and natural hazards, assessment and optimization of water networks have gained interest in recent years, overcoming the scientific fences of civil and hydraulic engineering and now being at the center of a wider vivid debate on how to maximize theoretical and experimental methods to increase security, reliability, and the so-called resilience of urban centers. Within this general scenario, this paper approaches the problem of the monitoring of leakage phenomena by focusing on the possibility of tracing the effects of the presence of not-necessarily circular holes on pipes subjected to combined water pressure and bending regimes, conceiving a parametric model which includes size, shape, orientation, and positioning of the hole, as well as different boundary conditions in the analyses to establish how they influence the final leakage. Sensitivity finite-element–based analyses are conducted to derive curves which could in principle serve, in combination with other consolidated strategies, to better identify position and amount of leakage phenomena. The outcomes are compared with the literature and in-house full-scale experimental findings, demonstrating good agreement between theoretical outcomes and laboratory results and gaining insight into advantages and limitations of the proposed strategy. It is felt that the developed approach, integrated with consolidated monitoring systems, might be useful to scientists and civil engineers in the management of existing hydraulic networks to estimate leakage volumes and predict more-realistic scenarios and related solutions for designing and planning practical interventions. This paper principally focuses on the hole geometry and position aspects, without addressing the hydraulic topic of discharge coefficient, in order to better understand the behavior of a leaking pipe.

ACS Style

F. De Paola; A. Cutolo; M. Giugni; M. Fraldi. Influence of Hole Geometry and Position in Leaking Pipes under Combined Pressure and Bending Regimes. Journal of Hydraulic Engineering 2019, 145, 04018081 .

AMA Style

F. De Paola, A. Cutolo, M. Giugni, M. Fraldi. Influence of Hole Geometry and Position in Leaking Pipes under Combined Pressure and Bending Regimes. Journal of Hydraulic Engineering. 2019; 145 (1):04018081.

Chicago/Turabian Style

F. De Paola; A. Cutolo; M. Giugni; M. Fraldi. 2019. "Influence of Hole Geometry and Position in Leaking Pipes under Combined Pressure and Bending Regimes." Journal of Hydraulic Engineering 145, no. 1: 04018081.

Articles
Published: 26 November 2018 in ISH Journal of Hydraulic Engineering
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Transients generated by expulsion of air pockets in water pipelines represent a key issue in the management of water systems. Severe pressure surges may arise, with detrimental effects on pipelines, valves and other devices. To analyze the transient and predict the resulting pressure surge, both theoretical and experimental studies have been developed in the literature. However, most studies consider horizontal or vertical pipelines, whereas the actual profile in the real field environment is a sequence of ascending and descending pipes. Consequently, this paper summarizes laboratory experiments carried out on an undulating pipeline, with an orifice fitted at the high point to simulate an air release valve. In the experiments, the orifice diameter, the supply pressure and the air volume entrapped in the descending pipe were varied. In almost all the runs, the peak pressure was achieved during the mass oscillation transient. Water hammer only occurs because of the expulsion of air bubbles within the water column, but generally the effect on the transient is fairly negligible. Results also showed that pressure surges decrease upon increasing the orifice diameter, except for high supply pressure and small-entrapped volume, for which an intermediate ‘critical’ orifice diameter can be identified.

ACS Style

Gabriella Balacco; Nicola Fontana; Ciro Apollonio; Maurizio Giugni; Gustavo Marini; Alberto Ferruccio Piccinni. Pressure surges during filling of partially empty undulating pipelines. ISH Journal of Hydraulic Engineering 2018, 1 -9.

AMA Style

Gabriella Balacco, Nicola Fontana, Ciro Apollonio, Maurizio Giugni, Gustavo Marini, Alberto Ferruccio Piccinni. Pressure surges during filling of partially empty undulating pipelines. ISH Journal of Hydraulic Engineering. 2018; ():1-9.

Chicago/Turabian Style

Gabriella Balacco; Nicola Fontana; Ciro Apollonio; Maurizio Giugni; Gustavo Marini; Alberto Ferruccio Piccinni. 2018. "Pressure surges during filling of partially empty undulating pipelines." ISH Journal of Hydraulic Engineering , no. : 1-9.

Journal article
Published: 01 November 2018 in Journal of Water Resources Planning and Management
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Coupling pressure management and energy recovery in water distribution networks (WDNs) is an appealing topic in the field of optimal management of water systems. The use of turbines or pumps as turbines (PATs) allows for reducing leakage within the network while also recovering energy that would otherwise dissipate, by means of pressure reducing valves (PRVs). Unlike water supply systems, where operating conditions remain essentially constant over time, a real-time control (RTC) is required in WDNs because of the variability of pressure and flow discharge during the day. To this end, a prototype for RTC of a WDN was presented and discussed in a recent paper, in which constant rotational speed of the impeller was considered. To overcome such a limitation and maximize energy recovery, an inverter was coupled to the prototype. A mathematical model of the prototype was developed and the decision variables were calculated by solving an optimization problem via the YALMIP tool of MATLAB at varying conditions of inflow discharge, pressure head at the inlet, and desired pressure head at the control node. The mathematical model was further validated through preliminary laboratory experiments, showing good agreement between simulated and actual values.

ACS Style

N. Fontana; M. Giugni; L. Glielmo; G. Marini; R. Zollo. Hydraulic and Electric Regulation of a Prototype for Real-Time Control of Pressure and Hydropower Generation in a Water Distribution Network. Journal of Water Resources Planning and Management 2018, 144, 04018072 .

AMA Style

N. Fontana, M. Giugni, L. Glielmo, G. Marini, R. Zollo. Hydraulic and Electric Regulation of a Prototype for Real-Time Control of Pressure and Hydropower Generation in a Water Distribution Network. Journal of Water Resources Planning and Management. 2018; 144 (11):04018072.

Chicago/Turabian Style

N. Fontana; M. Giugni; L. Glielmo; G. Marini; R. Zollo. 2018. "Hydraulic and Electric Regulation of a Prototype for Real-Time Control of Pressure and Hydropower Generation in a Water Distribution Network." Journal of Water Resources Planning and Management 144, no. 11: 04018072.

Journal article
Published: 11 July 2018 in Geosciences
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This laboratory study aimed at investigating the mean and turbulent characteristics of a densely vegetated flow by testing four different submergence ratios. The channel bed was covered by a uniform array of aligned metallic cylinders modeling rigid submerged vegetation. Instantaneous velocities, acquired with a three-component acoustic Doppler velocimeter (ADV), were used to analyze the mean and turbulent flow structure. The heterogeneity of the flow field was described by the distributions of mean velocities, turbulent intensities, skewness, kurtosis, Reynolds stresses, and Eulerian integral scales. The exchange processes at the flow–vegetation interface were explored by applying the turbulence triangle technique, a far less common technique for vegetated flows based on the invariant maps of the anisotropic Reynolds stress tensor.

ACS Style

Gerardo Caroppi; Paola Gualtieri; Nicola Fontana; Maurizio Giugni. Vegetated Channel Flows: Turbulence Anisotropy at Flow–Rigid Canopy Interface. Geosciences 2018, 8, 259 .

AMA Style

Gerardo Caroppi, Paola Gualtieri, Nicola Fontana, Maurizio Giugni. Vegetated Channel Flows: Turbulence Anisotropy at Flow–Rigid Canopy Interface. Geosciences. 2018; 8 (7):259.

Chicago/Turabian Style

Gerardo Caroppi; Paola Gualtieri; Nicola Fontana; Maurizio Giugni. 2018. "Vegetated Channel Flows: Turbulence Anisotropy at Flow–Rigid Canopy Interface." Geosciences 8, no. 7: 259.

Journal article
Published: 01 July 2018 in Journal of Geochemical Exploration
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This study, carried out within the FP7-ENV-2010 CLUVA project, aimed to classify and map sensitivity to desertification in peri-urban areas of Ouagadougou (Burkina Faso) and Saint Louis (Senegal) African cities by applying a multifactor approach based on the EU MEDALUS key indicators. All local data allowed identifying Environmentally Sensitive Areas (ESAs) and an Index of Environmentally Sensitive Areas (ESAI). The studied peri-urban areas had an overall high sensitivity to desertification. In Ouagadougou, the most sensitive areas were those poorly vegetated and overexploited by an ever-increasing demographic pressure; in Saint Louis, the critical zones were mostly located in the northern part of the studied area, strongly characterized by both shallow sandy soils and vegetation overexploitation by grazing and domestic. This study suggests that ESAs maps can represent a valuable tool to promote and orientate effective policies of desertification prevention and mitigation for sustainable development of the African rural-urban interfaces.

ACS Style

Fiore Capozzi; Anna Di Palma; Francesco De Paola; Maurizio Giugni; Pietro Iavazzo; Maria Elena Topa; Paola Adamo; Simonetta Giordano. Assessing desertification in sub-Saharan peri-urban areas: Case study applications in Burkina Faso and Senegal. Journal of Geochemical Exploration 2018, 190, 281 -291.

AMA Style

Fiore Capozzi, Anna Di Palma, Francesco De Paola, Maurizio Giugni, Pietro Iavazzo, Maria Elena Topa, Paola Adamo, Simonetta Giordano. Assessing desertification in sub-Saharan peri-urban areas: Case study applications in Burkina Faso and Senegal. Journal of Geochemical Exploration. 2018; 190 ():281-291.

Chicago/Turabian Style

Fiore Capozzi; Anna Di Palma; Francesco De Paola; Maurizio Giugni; Pietro Iavazzo; Maria Elena Topa; Paola Adamo; Simonetta Giordano. 2018. "Assessing desertification in sub-Saharan peri-urban areas: Case study applications in Burkina Faso and Senegal." Journal of Geochemical Exploration 190, no. : 281-291.

Journal article
Published: 18 May 2018 in Hydrology
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Nowadays, increased flood risk is recognized as one of the most significant threats in most parts of the world, with recurring severe flooding events causing significant property and human life losses. This has entailed public debates on both the apparent increased frequency of extreme events and the perceived increases in rainfall intensities within climate changing scenarios. In this work, a stationary vs. Non-Stationary Analysis of annual extreme rainfall was performed with reference to the case studies of the African cities of Dar Es Salaam (TZ) and Addis Ababa (ET). For Dar Es Salaam (TZ) a dataset of 53 years (1958–2010) of maximum daily rainfall records (24 h) was analysed, whereas a 47-year time series (1964–2010) was taken into account for Addis Ababa (ET). Both gauge stations rainfall data were suitably fitted by Extreme Value Distribution (EVD) models. Inference models using the Maximum Likelihood Estimation (MLE) and the Bayesian approach were applied on EVD considering their impact on the shape parameter and the confidence interval width. A comparison between a Non-Stationary regression and a Stationary model was also performed. On this matter, the two time series did not show any Non-Stationary effect. The results achieved under the CLUVA (Climatic Change and Urban Vulnerability in Africa) EU project by the Euro-Mediterranean Centre for Climate Change (CMCC) (with 1 km downscaling) for the IPCC RCP8.5 climatological scenario were also applied to forecast the analysis until 2050 (93 years for Dar Es Salaam TZ and 86 years for Addis Ababa ET). Over the long term, the process seemed to be Non-Stationary for both series. Moreover, with reference to a 100-year return period, the IDF (Intensity-Duration-Frequency) curves of the two case-studies were estimated by applying the Maximum Likelihood Estimation (MLE) approach, as a function of confidence intervals of 2.5% and 97.5% quantiles. The results showed the dependence of Non-Stationary effects of climate change to be conveniently accounted for engineering design and management.

ACS Style

Francesco De Paola; Maurizio Giugni; Francesco Pugliese; Antonio Annis; Fernando Nardi. GEV Parameter Estimation and Stationary vs. Non-Stationary Analysis of Extreme Rainfall in African Test Cities. Hydrology 2018, 5, 28 .

AMA Style

Francesco De Paola, Maurizio Giugni, Francesco Pugliese, Antonio Annis, Fernando Nardi. GEV Parameter Estimation and Stationary vs. Non-Stationary Analysis of Extreme Rainfall in African Test Cities. Hydrology. 2018; 5 (2):28.

Chicago/Turabian Style

Francesco De Paola; Maurizio Giugni; Francesco Pugliese; Antonio Annis; Fernando Nardi. 2018. "GEV Parameter Estimation and Stationary vs. Non-Stationary Analysis of Extreme Rainfall in African Test Cities." Hydrology 5, no. 2: 28.

Journal article
Published: 01 March 2018 in Journal of Water Resources Planning and Management
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Studies have shown that real-time control (RTC) of pressure in water distribution networks (WDNs) can be very effective for leakage reduction. The aim of RTC is to regulate the pressure level over the WDN by guaranteeing a pressure that is nearly constant and as low as possible at the critical node. To this end, a pressure reducing valve (PRV) at the network inlet can be remotely controlled to ensure the optimal service level, regardless of upstream pressure and inflow. Field experiments in a district of Benevento, Italy are carried out to assess the suitability of the proposed approach. Results show that the system guarantees the required pressure at the critical node at all times. The controller is effective in optimizing pressure levels over the entire WDN by also reducing excessive pressure in the other nodes. Experiments show that the pressure control is effective in reducing leakage, as confirmed by the minimum night flow (MNF) measurements.

ACS Style

N. Fontana; M. Giugni; L. Glielmo; G. Marini; R. Zollo. Real-Time Control of Pressure for Leakage Reduction in Water Distribution Network: Field Experiments. Journal of Water Resources Planning and Management 2018, 144, 04017096 .

AMA Style

N. Fontana, M. Giugni, L. Glielmo, G. Marini, R. Zollo. Real-Time Control of Pressure for Leakage Reduction in Water Distribution Network: Field Experiments. Journal of Water Resources Planning and Management. 2018; 144 (3):04017096.

Chicago/Turabian Style

N. Fontana; M. Giugni; L. Glielmo; G. Marini; R. Zollo. 2018. "Real-Time Control of Pressure for Leakage Reduction in Water Distribution Network: Field Experiments." Journal of Water Resources Planning and Management 144, no. 3: 04017096.

Journal article
Published: 27 February 2018 in Journal of Hydraulic Research
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ACS Style

Francesco Pugliese; Francesco De Paola; Nicola Fontana; Maurizio Giugni; Gustavo Marini. Performance of vertical-axis pumps as turbines. Journal of Hydraulic Research 2018, 56, 482 -493.

AMA Style

Francesco Pugliese, Francesco De Paola, Nicola Fontana, Maurizio Giugni, Gustavo Marini. Performance of vertical-axis pumps as turbines. Journal of Hydraulic Research. 2018; 56 (4):482-493.

Chicago/Turabian Style

Francesco Pugliese; Francesco De Paola; Nicola Fontana; Maurizio Giugni; Gustavo Marini. 2018. "Performance of vertical-axis pumps as turbines." Journal of Hydraulic Research 56, no. 4: 482-493.

Proceedings
Published: 01 January 2018 in Proceedings
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In this paper preliminary results of the numerical assessment of PAT erosion, caused by the impingement of solid particles in the water flow, are provided and discussed. A CFD model was developed by the Università degli Studi di Napoli Federico II to investigate the fluid dynamics of a PAT and coupled with the in-house E-CODE developed by the Politecnico di Milano for wear estimation. The erosion simulations were performed to assess the wear of PAT components, namely inlet, impeller, volute and outlet pipe, for abrasive particles with different size, aiming at estimating the relation between the fluid dynamics of the slurry flow and the development of the erosion process.

ACS Style

Oreste Fecarotta; Gianandrea Vittorio Messa; Francesco Pugliese; Armando Carravetta; Stefano Malavasi; Maurizio Giugni. Preliminary Development of a Method for Impact Erosion Prediction in Pumps Running as Turbines. Proceedings 2018, 2, 680 .

AMA Style

Oreste Fecarotta, Gianandrea Vittorio Messa, Francesco Pugliese, Armando Carravetta, Stefano Malavasi, Maurizio Giugni. Preliminary Development of a Method for Impact Erosion Prediction in Pumps Running as Turbines. Proceedings. 2018; 2 (11):680.

Chicago/Turabian Style

Oreste Fecarotta; Gianandrea Vittorio Messa; Francesco Pugliese; Armando Carravetta; Stefano Malavasi; Maurizio Giugni. 2018. "Preliminary Development of a Method for Impact Erosion Prediction in Pumps Running as Turbines." Proceedings 2, no. 11: 680.

Proceedings
Published: 01 January 2018 in Proceedings
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Pumps As Turbines (PATs) can be installed in Water Distribution Networks (WDNs) to couple pressure regulation and small-scale hydropower generation. The selection of PATs in WDNs needs proper knowledge about both the performances of machines available in the market and the operating conditions of the network. In this paper, a procedure for the preliminary selection of a PAT is proposed, based on the design of the main parameters (the head drop and the produced power at the Best Efficiency Point, the impeller diameter and the rotational speed) to both maximize the producible power and regulate the exceeding pressure.

ACS Style

Francesco Pugliese; Francesco De Paola; Nicola Fontana; Gustavo Marini; Maurizio Giugni. Optimal Selection of Pumps As Turbines in Water Distribution Networks. Proceedings 2018, 2, 685 .

AMA Style

Francesco Pugliese, Francesco De Paola, Nicola Fontana, Gustavo Marini, Maurizio Giugni. Optimal Selection of Pumps As Turbines in Water Distribution Networks. Proceedings. 2018; 2 (11):685.

Chicago/Turabian Style

Francesco Pugliese; Francesco De Paola; Nicola Fontana; Gustavo Marini; Maurizio Giugni. 2018. "Optimal Selection of Pumps As Turbines in Water Distribution Networks." Proceedings 2, no. 11: 685.

Proceedings
Published: 01 January 2018 in Proceedings
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In this work, a procedure for the optimal design of Pumps As Turbines in Water Distribution Networks was applied, aimed at both maximizing the hydropower generation and exploiting the excess pressure. The design of the main characteristic PAT parameters, namely the flow rate and the head drop at Best Efficiency Point, the rotational speed and the impeller’s diameter was assessed, under the hypothesis of applying the Electrical Regulation. The procedure allowed to estimate both the produced power and the exploited head at any simulated time-step, as well as the overall daily energy, in compliance with the hydraulic and technical constraints of the system. The model was tested on a simplified Water Distribution Network and a preliminary Cost-Benefit analysis was performed, showing interesting reliefs against short Payback Period.

ACS Style

Francesco Pugliese; Francesco De Paola; Nicola Fontana; Gustavo Marini; Maurizio Giugni. Small-Scale Hydropower Generation in Water Distribution Networks by Using Pumps as Turbines. Proceedings 2018, 2, 1486 .

AMA Style

Francesco Pugliese, Francesco De Paola, Nicola Fontana, Gustavo Marini, Maurizio Giugni. Small-Scale Hydropower Generation in Water Distribution Networks by Using Pumps as Turbines. Proceedings. 2018; 2 (23):1486.

Chicago/Turabian Style

Francesco Pugliese; Francesco De Paola; Nicola Fontana; Gustavo Marini; Maurizio Giugni. 2018. "Small-Scale Hydropower Generation in Water Distribution Networks by Using Pumps as Turbines." Proceedings 2, no. 23: 1486.

Journal article
Published: 01 January 2018 in Journal of Water Resources Planning and Management
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Pressure-reducing valves (PRVs) are often used in water distribution networks (WDNs) to regulate pressure for leakage reduction. Optimal management would require the pressure to be constant and as low as possible at the WDN critical node. Such operating conditions can be achieved by means of real-time control (RTC) of the PRVs. Because the pressure RTC of PRVs in WDNs is still an uncommon application, this paper first provides the theoretical framework of control systems and also discusses the benefits of a feedback control over a feedforward scheme. A closed-loop controller was developed, allowing RTC of pressure at the critical node in a WDN by changing the pressure set point in the PRV at the network inlet. To this end, a diaphragm-actuated control valve coupled to an actuator for remote control of the pilot spring was used. Laboratory experiments were carried out to characterize PRV operation and effectiveness of the algorithms. A simplified model of the PRV and numerical simulations to reproduce the pressure transient were also developed. Results show that (1) the algorithm is able to control pressure also in case of abrupt variations of the set point pressure and finite delays; and (2) the numerical model is in good agreement with relevant experiments.

ACS Style

Nicola Fontana; Maurizio Giugni; Luigi Glielmo; Gustavo Marini; Francesca Verrilli. Real-Time Control of a PRV in Water Distribution Networks for Pressure Regulation: Theoretical Framework and Laboratory Experiments. Journal of Water Resources Planning and Management 2018, 144, 04017075 .

AMA Style

Nicola Fontana, Maurizio Giugni, Luigi Glielmo, Gustavo Marini, Francesca Verrilli. Real-Time Control of a PRV in Water Distribution Networks for Pressure Regulation: Theoretical Framework and Laboratory Experiments. Journal of Water Resources Planning and Management. 2018; 144 (1):04017075.

Chicago/Turabian Style

Nicola Fontana; Maurizio Giugni; Luigi Glielmo; Gustavo Marini; Francesca Verrilli. 2018. "Real-Time Control of a PRV in Water Distribution Networks for Pressure Regulation: Theoretical Framework and Laboratory Experiments." Journal of Water Resources Planning and Management 144, no. 1: 04017075.

Proceedings
Published: 01 January 2018 in Proceedings
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In the present paper, different clustering techniques were applied to detect significant patterns describing single-household water consumption in a residential neighborhood of the City of Naples, basing on hourly time series aggregated at the monthly scale. Comparisons among results were performed by means of a selection of Clustering Validity Indices, that were adjusted to overcome a bias caused by sparsely populated clusters. The most performant cluster solution proved to be the one resulting from the application of a mixed strategy, namely a Self-Organized Map followed by K-means performed on first level cluster centroids.

ACS Style

Roberta Padulano; Giuseppe Del Giudice; Maurizio Giugni; Nicola Fontana; Gianluca Sorgenti Degli Uberti. Identification of Annual Water Demand Patterns in the City of Naples. Proceedings 2018, 2, 587 .

AMA Style

Roberta Padulano, Giuseppe Del Giudice, Maurizio Giugni, Nicola Fontana, Gianluca Sorgenti Degli Uberti. Identification of Annual Water Demand Patterns in the City of Naples. Proceedings. 2018; 2 (11):587.

Chicago/Turabian Style

Roberta Padulano; Giuseppe Del Giudice; Maurizio Giugni; Nicola Fontana; Gianluca Sorgenti Degli Uberti. 2018. "Identification of Annual Water Demand Patterns in the City of Naples." Proceedings 2, no. 11: 587.