Articles publicats (Grup de Recerca de Dinàmica Fluvial (RIUS))
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- ItemOpen AccessComparative analysis and evaluation of seismic response in structures: perspectives from non-linear dynamic analysis to pushover analysis(MDPI, 2024-03-15) Rodríguez, César A.; Rodríguez Pérez, Ángel Mariano; López Alonso, Raúl; Caparrós Mancera, Julio JoseThis study presents a detailed comparative analysis of different methods for evaluating seismic response in structures, focusing on maximum displacements and collapse assessment. The results obtained through modal spectral analysis, non-linear dynamic analysis, and the incremental pushover analysis applied to a specific structure are compared. It has been found that the choice of time step and the consideration of ductility are critical for obtaining accurate predictions. The results of the non-linear dynamic analysis of the building's response indicate that an earthquake equivalent to the one that affected the city of Lorca (southeast Iberian Peninsula) in 2011 would have a devastating impact on the studied structure, highlighting the importance of the finite element method modelling in predicting the formation of plastic hinges and assessing structural safety. These findings highlight the importance of utilising multiple analysis approaches and detailed modelling to fully understand the seismic behaviour of structures and ensure adequate resistance and stability to extreme events.
- ItemOpen AccessWater microturbines for sustainable applications: optimization analysis and experimental validation(Springer, 2024) Rodríguez-Pérez, Angel M.; Rodríguez-González, César Antonio; López Alonso, Raúl; Hernandez-Torres, J. A.; Caparros-Mancera, J. J.The use of microturbines in irrigation applications represents a great opportunity for increasing sustainable energy generation. Irrigation systems have water flow that can be used to generate electricity based on microturbines that are acceptably configure such, that efficiency in crop irrigation is not affected. This research validates this use of microturbines through a system designed specifically for the characterization of microturbine generation technology. This system includes a closed water pumping circuit capable of working under, different water flow settings, as well as flow, pressure, and electricity generation sensors. For this system, the production range of the microturbines and the pressure loss associated with the various proposed configurations are characterized and specifically quantified for the best performance. After design and characterization of a scalable microturbine system, the feasibility and benefits of this application to supporting most relevant crops supplied by localized irrigation are analysed. The experiments demonstrate the greatest benefit with the implementation of 15 series microturbines each at 80 V, alongside non-Citrus fruit, where a favourable balance is achieved for the amortization period in vineyards and citrus fruit. The results validate a profitable and sustainable design for electricity generation, with return on investment rates of up to 53%. Therefore, this research offers real and extensive applications, while being scalable to rural, residential, urban and industrial settings. Center dot Development of an experimental system for the characterization of water microturbines and validation in irrigation systems.center dot Design of a system to obtain clean energy from the pressure head excess of irrigation systems based on experimental characterization.center dot Analysis of the feasibility and investment of the application of the sustainable energy generation system to different crops.
- ItemOpen AccessEvaluation of 2D hydrodynamic-based rainfall/runoff modelling for soil erosion assessment at a seasonal scale(Elsevier, 2024) Costabile, Pierfranco; Cea, Luis; Barbaro, Gabriele; Costanzo, Carmelina; Llena, Manel; Vericat Querol, DamiàBadlands are often the source of a significant fraction of the sediment reaching the river network due to the exposure of the bare soil to the impact of rain drops and to the bed shear stress generated by the surface runoff. Hence, a correct understanding of the soil erosion and sediment transport processes inside badlands can help to a better characterisation of the suspended sediment production at the catchment scale. In this work we study the suitability of a two-dimensional (2D) physically-based event-scale erosion model as a tool to represent soil erosion and sediment transport in badlands at a seasonal scale. The model solves the 2D shallow water equations, including infiltration and rainfall, in order to compute the generation and routing of surface runoff within the badland. Coupled to the hydrodynamic equations, the model solves a 2D suspended sediment transport equation with source terms that account for rainfall- and runoff-driven erosion and sediment deposition. Based on this model, an overall procedure was developed and tested considering, as case study, a badland located in El Soto catchment (central Pyrenees, Iberian Peninsula). For the analysed badland, several high-resolution topography surveys were available, which allowed for the estimation of the soil loss and the spatial distribution of erosion patterns for periods of 3–4 months over two years. These data sets were used to calibrate and validate the proposed modelling approach, and to analyse its capabilities and limitations for the assessment of soil erosion at the seasonal scale.
- ItemOpen AccessWater microturbines for sustainable applications: optimization analysis and experimental validation(Springer Science and Business Media, 2023) Rodríguez-Pérez, A. M.; Rodríguez-Gonzalez, C. A.; López Alonso, Raúl; Hernández-Torres J. A.; Caparrós-Mancera, Julio JoseThe use of microturbines in irrigation applications represents a great opportunity for increasing sustainable energy generation. Irrigation systems have water flow that can be used to generate electricity based on microturbines that are acceptably configure such, that efficiency in crop irrigation is not affected. This research validates this use of microturbines through a system designed specifically for the characterization of microturbine generation technology. This system includes a closed water pumping circuit capable of working under, different water flow settings, as well as flow, pressure, and electricity generation sensors. For this system, the production range of the microturbines and the pressure loss associated with the various proposed configurations are characterized and specifically quantified for the best performance. After design and characterization of a scalable microturbine system, the feasibility and benefits of this application to supporting most relevant crops supplied by localized irrigation are analysed. The experiments demonstrate the greatest benefit with the implementation of 15 series microturbines each at 80 V, alongside non-Citrus fruit, where a favourable balance is achieved for the amortization period in vineyards and citrus fruit. The results validate a profitable and sustainable design for electricity generation, with return on investment rates of up to 53%. Therefore, this research offers real and extensive applications, while being scalable to rural, residential, urban and industrial settings.
- ItemOpen Access100 key questions to guide hydropeaking research and policy(Elsevier, 2023-09-16) Hayes, Daniel S.; Bruno, M.C.; Alp, Maria; Boavida, Isabel; Batalla, Ramon J.; Bejarano, Maria Dolores; Noack, Markus; Vanzo, Davide; Casas Mulet, Roser; Vericat Querol, Damià; Carolli, Mauro; Tonolla, Diego; Halleraker, Jo Halvard; Gosselin, M. P.; Chiogna, Gabriele; Zolezzi, Guido; Venus, TereseAs the share of renewable energy grows worldwide, flexible energy production from peak-operating hydropower and the phenomenon of hydropeaking have received increasing attention. In this study, we collected open research questions from 220 experts in river science, practice, and policy across the globe using an online survey available in six languages related to hydropeaking. We used a systematic method of determining expert consensus (Delphi method) to identify 100 high-priority questions related to the following thematic fields: (a) hydrology, (b) physico-chemical properties of water, (c) river morphology and sediment dynamics, (d) ecology and biology, (e) socio-economic topics, (f) energy markets, (g) policy and regulation, and (h) management and mitigation measures. The consensus list of high-priority questions shall inform and guide researchers in focusing their efforts to foster a better science-policy interface, thereby improving the sustainability of peak-operating hydropower in a variety of settings. We find that there is already a strong understanding of the ecological impact of hydropeaking and efficient mitigation techniques to support sustainable hydropower. Yet, a disconnect remains in its policy and management implementation.