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Luis Cea      
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Luis Cea published an article in November 2018.
Top co-authors See all
Moncho Gomez-Gesteira

103 shared publications

Environmental Physics Laboratory (EPHYSLAB), Universidad de Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain

Jerónimo Puertas

44 shared publications

Water and Environmental Engineering Group, Departamento de Métodos Matemáticos y de Representación; Universidade da Coruña; A Coruña Spain

J.M. Domínguez

21 shared publications

Environmental Physics Laboratory (EPHYSLAB), Universidad de Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain

Joaquín Suárez

16 shared publications

University of Coruña, Group of Water and Environmental Engineering, 15071 Coruña, Spain

J. González-Cao

7 shared publications

Environmental Physics Laboratory (EPHYSLAB), Universidad de Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain

31
Publications
31
Reads
11
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143
Citations
Publication Record
Distribution of Articles published per year 
(2004 - 2018)
Total number of journals
published in
 
24
 
Publications See all
Article 0 Reads 0 Citations Incorporating Antecedent Moisture Conditions and Intraevent Variability of Rainfall on Flood Frequency Analysis in Poorl... L. Cea, I. Fraga Published: 08 November 2018
Water Resources Research, doi: 10.1029/2018wr023194
DOI See at publisher website
Article 0 Reads 1 Citation An Accelerated Tool for Flood Modelling Based on Iber Orlando García-Feal, José González-Cao, Moncho Gómez-Gesteir... Published: 16 October 2018
Water, doi: 10.3390/w10101459
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This paper presents Iber+, a new parallel code based on the numerical model Iber for two-dimensional (2D) flood inundation modelling. The new implementation, which is coded in C++ and takes advantage of the parallelization functionalities both on CPUs (central processing units) and GPUs (graphics processing units), was validated using different benchmark cases and compared, in terms of numerical output and computational efficiency, with other well-known hydraulic software packages. Depending on the complexity of the specific test case, the new parallel implementation can achieve speedups up to two orders of magnitude when compared with the standard version. The speedup is especially remarkable for the GPU parallelization that uses Nvidia CUDA (compute unified device architecture). The efficiency is as good as the one provided by some of the most popular hydraulic models. We also present the application of Iber+ to model an extreme flash flood that took place in the Spanish Pyrenees in October 2012. The new implementation was used to simulate 24 h of real time in roughly eight minutes of computing time, while the standard version needed more than 15 h. This huge improvement in computational efficiency opens up the possibility of using the code for real-time forecasting of flood events in early-warning systems, in order to help decision making under hazardous events that need a fast intervention to deploy countermeasures.
CONFERENCE-ARTICLE 15 Reads 0 Citations <span>Iber as a tool to analyse flooding scenarios </span> Orlando García-Feal, José Gonzalez-Cao, Luis Cea, Arno Forme... Published: 06 November 2017
First International Electronic Conference on the Hydrological Cycle, doi: 10.3390/CHyCle-2017-04841
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Abstract: Floods are one of the most dangerous extreme events that can affect people and properties. These events have intensified worldwide over the last decades due to climate change. Therefore, the capability to predict and analyse, in a quick and accurate way, the effects of these floods is of crucial importance to avoid or minimize the hazards associated to them. This task can be accomplished by means of numerical tools as Iber. Iber is a 2-D numerical model, developed by GEAMA (Universidade da Coruña) and Flumen (Universitat Politècnica de Catalunya), that uses the finite volume technique to solve the 2-D Shallow Water Equations in order to obtain the water depth and velocity components of the flow under different scenarios. To assess the capabilities of Iber  a series of test cases have been reproduced following the document “Benchmarking the latest generation of 2D hydraulic modelling packages” published by the non-departmental public body Environment Agency of the U.K. Government. The results show that Iber is a suitable tool to reproduce accurately different flooding scenarios. A new implementation of the model has been developed by EPHYSLAB. This implementation takes advantage of the modern hardware capabilities and provides significant speedups over the original code. The new possibilities offered by a faster code will be studied.

CONFERENCE-ARTICLE 11 Reads 0 Citations <span>Preservation of the cultural heritage from floods using the numerical code Iber </span> José Gonzalez-Cao, Orlando García-Feal, Luis Cea, Moncho Góm... Published: 06 November 2017
First International Electronic Conference on the Hydrological Cycle, doi: 10.3390/CHyCle-2017-04843
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Abstract: Preserving the cultural heritage of antiquity is one of the most important tasks of the mankind. On this basis, the European Parliament, via the Policy Department Structural and Cohesion Policies, published the study entitled: “Protecting The Cultural Heritage From Natural Disasters”. This study analyses the actions that are being carried out to protect the cultural heritage from floods, earthquakes and other natural phenomena in Europe. In this work the numerical code Iber has been used to design the protection barriers from floods of the Roman Military Camp of “Aquis Querquennis” (69-79 A.C.). This roman camp, inside the Roman Itinerary “Via Nova”, is located in the shore of the “Las Conchas” impoundment in the Northwest of Spain. This camp is subjected to the floods associated to this impoundment of “Las Conchas”. Therefore, and according to the directives of the European Parliament, a series of protecting measures have been analysed using Iber, which is a 2-D numerical code developed by GEAMA (Universidade da Coruña) and Flumen (Universitat Politècnica de Catalunya) that uses the finite volume technique to solve the 2-D Shallow Water Equations.

Article 0 Reads 6 Citations Quantifying local rainfall dynamics and uncertain boundary conditions into a nested regional-local flood modeling system María Bermúdez, Jeffrey C. Neal, Paul D. Bates, Gemma Coxon,... Published: 07 April 2017
Water Resources Research, doi: 10.1002/2016wr019903
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Inflow discharge and outflow stage estimates for hydraulic flood models are generally derived from river gauge data. Uncertainties in the measured inflow data and the neglect of rainfall-runoff contributions to the modeled domain downstream of the gauging locations can have a significant impact on these estimated “whole reach” inflows and consequently on flood predictions. In this study, a method to incorporate rating curve uncertainty and local rainfall-runoff dynamics into the predictions of a reach-scale flood model is proposed. The methodology is applied to the July 2007 floods of the River Severn in UK. Discharge uncertainty bounds are generated applying a nonparametric local weighted regression approach to stage-discharge measurements for two gauging stations. Measured rainfall downstream from these locations is used as input to a series of subcatchment regional hydrological model to quantify additional local inflows along the main channel. A regional simplified-physics hydraulic model is then applied to combine these contributions and generate an ensemble of discharge and water elevation time series at the boundaries of a local-scale high complexity hydraulic model. Finally, the effect of these rainfall dynamics and uncertain boundary conditions are evaluated on the local-scale model. Accurate prediction of the flood peak was obtained with the proposed method, which was only possible by resolving the additional complexity of the extreme rainfall contributions over the modeled area. The findings highlight the importance of estimating boundary condition uncertainty and local rainfall contributions for accurate prediction of river flows and inundation at regional scales.
Article 0 Reads 2 Citations Hydraulic model study of the intake-outlet of a pumped-storage hydropower plant María Bermúdez, Luis Cea, Jerónimo Puertas, André Conde, Ana... Published: 01 January 2017
Engineering Applications of Computational Fluid Mechanics, doi: 10.1080/19942060.2017.1314869
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The design of intake-outlet structures for pumped-storage hydroelectric power plants requires site-specific location and geometry studies in order to ensure their satisfactory hydraulic performance. This article presents the numerical and physical model studies conducted on the lower intake-outlet of Belesar III power station in Northwest Spain. The proposed location of this structure in a narrow reservoir and at a shallow depth is particularly challenging and required the analysis of both the near-field and far-field flow dynamics in the reservoir. First, the hydrodynamics of the reservoir were studied with a 2D shallow water model. The location of the intake was found to be suitable, with adequate flow conditions in the reservoir even for the lower operating water levels. The intake could be fed with the maximum pumping discharge without being limited by the reservoir’s hydraulics. Second, the flow in the near-field was investigated by complementary use of 3-dimensional numerical simulations and reduced-scale physical modeling. The results allowed the verification of the submergence requirements and the comparison of geometry alternatives. In comparison with the initial design, the final proposed design shows a more symmetrical approach flow into the structure during pumping mode, resulting in a more homogenous flow distribution between the openings and reduced head loss. This study can provide guidance in the application of hydraulic modeling procedures to locate and design intake-outlet structures in existing lakes or reservoirs and to evaluate potential limitations on water levels, inflows and outflows. It can be useful during planning stages of power plants to aim for the shortest possible waterways between the reservoirs while ensuring adequate flow conditions.
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