Ignacio Villanueva

• Ph.D.
• Researcher at Instituto de Hidrología de Llanuras

Flatland areas, such as the Pampas in South America, rank among the world’s most economically productivelandscapes. Over the last century, these regions have been increasingly used for intensive production, which hasresulted in significant environmental impacts. These include alterations in pH, salinity, and other soil properties;changes in water f...

Google-Earth-Engine reservoir monitoring including CHIRPS rainfall, basic hydrological model, and Sentinel-2 based water surface extent: preliminary validation results.

In Peru, some initiatives have been launched to create a more favourable environment to prevent deforestation and subsequent environmental hazard development. Moreover, mechanisms to encourage investments linked to “Natural or Green Infrastructure” have been developed. For example, “Sembramos Agua” funding of the Water and Sewerage Service of Lima,...

Large debris flows in steep-sloped ravines debouching to the Rimac River, in metropolitan Lima (Peruvian capital), have resulted in considerable loss of life and property adversely impacting communities in the region. Temporal, spatial and volumetric features of debris flows are difficult to predict, and it is of utmost importance that achievable m...

RESUMEN: RiverFlow2D es el modelo hidráulico bidimensional cuya principal característica es que utiliza para el cálculo mallas flexibles formadas por triángulos, lo que permite que la malla se adapte a contornos irregulares y pueda refinarse en zonas donde se requiere mayor detalle. En el presente trabajo se presentan aplicaciones del modelo en la...

Currently, the simulation of floods with mathematical models for the Saint Venant equations (or shallow water) in both 1D and 2D has a large number of codes for its execution, but there are not so many robust and free use codes available. IBER free-use software has been used and the model has been validated by reproducing the flood extent of May 20...

Seawater Intrusion principles and Software evaluation for capacity building first steps.

Two-dimensional flood inundation models are widely used tools for flood hazard mapping and an essential component of statutory flood risk management guidelines in many countries. Yet, we still do not know how much physical complexity a flood inundation model needs for a given problem. Here, three two-dimensional explicit hydraulic models, which can...

1. Introducción: Los modelos hidráulicos bidimensionales permiten conocer mediante diversos cálculos la extensión, la duración y la magnitud de inundaciones sobre una topografía concreta. En este tipo de modelos, la topografía constituye el elemento más determinante para obtener los mejores resultados, ya que unos errores en esta representación top...

El objetivo principal de este artículo es validar un modelo numérico para el cálculo computacional de ondas de avenida en cauces fluviales, en aproximación unidimensional. Se presenta la comparación de resultados frente a los datos experimentales de un ensayo de laboratorio, y la comparación con un caso test propuesto y resuelto por otros autores.

The upgrade procedure for a real time flood forecasting and decision support system is described for the case of the Tagus basin in central Spain. The system has been operational during the last 9 years and it is focused in the control of multiple reservoir cascades during snow melting events. The description includes explanations of the data flow...

One of the largest known floods occurred during the Late Quaternary, emanating from an ice-dammed lake in Asia. Glacial lake Kuray–Chuja was formed by a 600-m-high ice dam converging in the Chuja River valley of the Altai Mountains in southern Siberia. The dam impounded up to 594km3 of water in the Kuray and Chuja basins.At least three floods from...

Algorithms for parallel processing have been described and demonstrated for grids containing over six million cells. This has been achieved by the use of the freely available MPI libraries. The efficiencies are good and demonstrate that such a technique can be used in urban areas without loss of representation of physical phenomena. The implementat...

A methodology for using remotely sensed data to both generate and evaluate a hydraulic model of floodplain inundation is presented for a rural case study in the United Kingdom: Upton-upon-Severn. Remotely sensed data have been processed and assembled to provide an excellent test data set for both model construction and validation. In order to asses...

This paper describes benchmark testing of six two-dimensional (2D) hydraulic models (DIVAST, DIVAST-TVD, TUFLOW, JFLOW, TRENT and LISFLOOD-FP) in terms of their ability to simulate surface flows in a densely urbanised area. The models are applied to a 1.0 km x 0.4 km urban catchment within the city of Glasgow, Scotland, UK, and are used to simulate...

Several hybrid approaches that combine ID modelling for the main river and 2D modelling for the flood plains are discussed and compared. These range from a commercial quasi-2D or storage cell model approach, a 2D raster based approach based in the Manning equation, and a complete 2D shallow water equation solver in explicit and implicit version, ba...

As part of the nationally funded Flood Risk Management Research Consortium the use of linked one-dimensional and two-dimensional models has been investigated with a view to optimising the balance of accuracy, model complexity and run times. This has been developed in research software named TRENT using a Riemann approach for both dimensional repres...

Recent severe flooding in the UK has highlighted the need for better information on flood risk, increasing the pressure on engineers to enhance the capabilities of computer models for flood prediction. This paper evaluates the benefits to be gained from the use of remotely sensed data to support flood modelling. The remotely sensed data available c...

In many countries, the determination of the parameters of the wave, likely to be produced after the failure of a dam, is required by law, and systematic studies are mandatory. There is a necessity to develop adequate numerical solvers which are able to reproduce situations originated from the irregularities of a non-prismatic bed and to model the c...

A Riemann solver approach has been developed for the solution of both the one- and two- dimensional shallow water equations. The two methods are integrated to allow transfer of uid from one to the other. This allows for integrated computations of o ws in a channel and o od- plains. Before it is applied to a real and practical o od inundation case w...

A one-dimensional numerical model has been applied to the French Malpasset dam failure which happened in 1959. The case is very important as a calibration of numerical schemes that try to reproduce propagation times and maximum depths downstream the valley, when a strong hydrograph is generated by the dam collapse in a real case. Both field and exp...