Next Article in Journal
Evaluation of Decentralized, Closely-Spaced Precipitation Water and Treated Wastewater Infiltration
Next Article in Special Issue
The Role of Moisture Sources and Climatic Teleconnections in Northeastern and South-Central Iran’s Hydro-Climatology
Previous Article in Journal
A Multi-GCM Assessment of the Climate Change Impact on the Hydrology and Hydropower Potential of a Semi-Arid Basin (A Case Study of the Dez Dam Basin, Iran)
Previous Article in Special Issue
Using Water Temperature, Electrical Conductivity, and pH to Characterize Surface–Groundwater Relations in a Shallow Ponds System (Doñana National Park, SW Spain)
Open AccessArticle

An Accelerated Tool for Flood Modelling Based on Iber

1
Environmental Physics Laboratory (EPHYSLAB), Universidad de Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain
2
Environmental and Water Engineering Group, Departamento de Ingeniería Civil, Universidade da Coruña, Campus Elviña s/n, E-15071 A Coruña, Spain
3
Laboratorio de Informática Aplicada, Universidade de Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain
*
Author to whom correspondence should be addressed.
Water 2018, 10(10), 1459; https://doi.org/10.3390/w10101459
Received: 27 September 2018 / Revised: 11 October 2018 / Accepted: 14 October 2018 / Published: 16 October 2018
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. View Full-Text
Keywords: flood; numerical simulation; shallow water equations; Iber+; benchmark; CUDA; OpenMP; finite volume flood; numerical simulation; shallow water equations; Iber+; benchmark; CUDA; OpenMP; finite volume
Show Figures

Figure 1

MDPI and ACS Style

García-Feal, O.; González-Cao, J.; Gómez-Gesteira, M.; Cea, L.; Domínguez, J.M.; Formella, A. An Accelerated Tool for Flood Modelling Based on Iber. Water 2018, 10, 1459.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop