Carles Ferrer‐Boix

Carles Ferrer‐Boix
Universitat Politècnica de Catalunya | UPC · Department of Graphic and Design Engineering

PhD

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37
Publications
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352
Citations

Publications

Publications (37)
Article
The large pier of an emblematic bridge built in 2008 in the Ebro River (Zaragoza, Spain) obstructs the flow in high floods. Clear-water scour experiments in a scale model were conducted to anticipate maximum local scour depths and design riprap protections. These proved to be effective during a large flood event in 2015, but bed aggradation under t...
Article
In this research, we explore the alluviation process of an artificial side-channel built in August 2015 and designed to alleviate bank erosion risks on the main river. The study area is located on the lower Gállego River, a meandering-wandering gravel-bed river draining the Southern Pyrenees. This river reach is still dynamic (i.e. chutes, meander...
Article
Full-text available
With the increasing attention on environmental flow management for the maintenance of habitat diversity and ecosystem health of mountain gravel-bed rivers, much interest has been paid to how inter-flood low flow can affect gravel-bed river morphodynamics during subsequent flood events. Previous research has found that antecedent conditioning flow c...
Article
Full-text available
The human pressure upon an alluvial river in the Mediterranean region has changed its riverine and deltaic landscapes. The river has been channelized in the last 70 years while the delta has been retreating for more than a century (a set of data unknown, so far). The paper concentrates on the fluvial component, trying to connect it to the delta evo...
Article
Full-text available
Flume experiments were conducted to understand the role of episodic sediment supply on the threshold of motion, streambed state, and stability in gravel bed channels. We demonstrate the importance of bed surface evolution on grain entrainment and hence channel stability. The grain‐size distribution (GSD) of the bed surface coarsened quickly under n...
Preprint
Full-text available
With the increasing attention on environmental flow management for the maintenance of habitat diversity and ecosystem health of mountain gravel-bed rivers, much interest has been paid to how inter-flood low flow can affect gravel-bed river morphodynamics during subsequent flood events. Previous research has found that antecedent conditioning flow c...
Preprint
Full-text available
The human pressure upon an alluvial river in the Mediterranean region has changed its riverine and deltaic landscapes. The river has been channelized in the last 50 years while the delta is being retreating for more than a century. The paper concentrates on the fluvial component, trying to connect it to the delta evolution. It develops a method to...
Article
We use flume experiments to better understand how gravel‐bed channels maintain bed surface stability in response to pulses of sediment supply. Bed elevations and surface imagery at high spatial resolutions were used to quantify the co‐evolution of surface grain‐size distribution (GSD), bed roughness statistics, and bed surface structures (clusters,...
Article
Transient scour and fill refers to the general scour and fill in a riverbed due to flood passage. It was given much attention in times of Leopold and Maddock (1953) and Colby (1964) from records of outstanding case studies. Field data from a station in a contracted, long reach of the large sand-bed Pilcomayo River –1192 newly typed in forms– are pr...
Article
A river at equilibrium is described by a statistically‐stationary mean bed elevation profile that arises in response to steady supplies of relief, water and sediment. Outside of the profile shape, how is the equilibrium state of a river most reliably identified and rigorously defined? Motivated by a proposed link between equilibrium and physical pr...
Article
Channel morphology of forested, mountain streams in glaciated landscapes is regulated by a complex suite of processes, and remains difficult to predict. Here, we analyze models of channel geometry against a comprehensive field dataset collected in two previously glaciated basins in Haida Gwaii, B.C., to explore the influence of variable hillslope‐c...
Article
Full-text available
Field observations, experiments and numerical simulations suggest that pool-riffles along gravel-bed mountain streams develop due to downstream variations of channel width. Where channels narrow, pools are observed, and at locations of widening, riffles occur. Based on previous work, we hypothesize that the bed profile is coupled to downstream widt...
Chapter
This chapter reviews the basic principles of sediment transport in streams, channel classification, mountain channel morphology, and associated implications for fish spawning habitats. Local sediment transport processes construct the differing channel morphologies, which are often opportunistically used by spawning fish. At the watershed scale, the...
Conference Paper
Full-text available
The methodology and results of two dam removals in two different rivers is presented and compared. One removed all-at-once and the second one in a four-stage removal process. Methodology included topographical measurements of the channel, TLS measurements of river bed and bars and sediment grain size and transport. Morphological channel adjustments...
Article
Dam removal has been demonstrated to be one of the most frequent and effective fluvial restoration actions but at most dam removals, especially of small dams, there has been little geomorphological monitoring. The results of the geomorphological monitoring implemented in two dams in the rivers Urumea and Leitzaran (northern Spain) are presented. Th...
Article
Full-text available
Longitudinal profiles of alluvial rivers usually exhibit upward-concave curvatures at equilibrium. River profile concavity has been primarily attributed to sediment downstream fining and to streamwise increments of water discharge. Conversely, upward-convex profiles have been typically associated with tectonic and geologic controls and with outlet...
Article
In order to study the morphological evolution of river beds composed of heterogeneous material, the interaction among the different grain sizes must be taken into account. In this paper, these equations are combined with the two-dimensional shallow water equations to describe the flow field. The resulting system of equations can be solved in two wa...
Article
Gravel-bed rivers commonly exhibit a coarse surface armor resulting from a complex history of interactions between flow and sediment supply. The evolution of the surface texture under single storm events or under steady flow conditions has been studied by a number of researchers. However, the role of successive floods on the surface texture evoluti...
Chapter
This text addresses the particular case of motion and causes of motion of granular material as bedload in the fluvial domain. The aim is to perform and overview of key concepts, main achievements and recent advances on the description of the processes involved in erosion, deposition and transport of sediment in open-channels. The theoretical functi...
Conference Paper
Full-text available
Resumen Se presenta la metodología diseñada para el seguimiento geomorfológico del derribo de las presas de Mendaraz (río Urumea) e Inturia (río Leitzaran) en Gipuzkoa, así como los resultados obtenidos. Se han realizado secciones transversales, perfiles longitudinales, abundantes mediciones de procesos sobre testigos, mediciones con escáner láser...
Article
Full-text available
This paper presents the results of a Gilbert-type delta progradation experiment within an impoundment created by a dam. The delta was composed of a poorly-sorted sand-gravel mixture in a bedload-dominated environment. The main goal of the paper is to analyze the sorting process of material within the deposit as the delta progrades towards the dam....
Article
Full-text available
The flow within a sewage screening chamber can be highly complex due to high-flow conditions and the geometrical constraints imposed by the screening chamber itself. This paper presents an application of a two-dimensional depth-averaged shallow flow model for flow simulations in a sewage screening chamber. For this purpose, the shallow flow model i...
Article
Dam removal is commonly used for river restoration. However, there are still some uncertainties associated with dam removal, mainly related to the sediment transport rates released downstream from the deposit that had previously filled the impoundment. This research studies the physical response to dam removal in the antecedent deposit by answering...
Article
The role played by the texture of the sediment supply on channel bed adjustments in gravel-bed rivers is poorly understood. To address this issue, an experimental campaign has been designed. Flume experiments lasting 96 hours in a 9-m long, 0.60 m-wide have been performed with different sand-gravel mixtures as feed textures. The response of the sur...
Article
The evolution of the bed surface and bedload transport rates under a sudden increase of the water discharge (pulse) has been relatively unexplored in an experimental setup. Further, no systematic investigation has been performed to analyze the role played by the frequencies at which these pulses occur in the bed adjustments. This contribution prese...
Article
Full-text available
A methodology for dam removal monitoring and the results of two case studies is presented: Mendaraz dam (Urumea River) and Inturia dam (Leitzaran River), both located in Gipuzkoa. This monitoring is conducted by river survey cross-sections, measurements of processes and granulometrical analysis. Fast sediment erosion and sedimentation together with...
Article
Full-text available
A methodology for dam removal monitoring and the results of two case studies is presented: Mendaraz dam (Urumea River) and Inturia dam (Leitzaran River), both located in Gipuzkoa. This monitoring is conducted by river survey cross-sections, measurements of processes and granulometrical analysis. Fast sediment erosion and sedimentation together with...
Article
Full-text available
earth-surf-dynam.net/2/323/2014/ doi:10.5194/esurf-2-323-2014 © Author(s) 2014. CC Attribution 3.0 License. Abstract. A one-dimensional model that is able to store the stratigraphy emplaced by a prograding delta is validated against experimental results. The laboratory experiment describes the migration of a Gilbert delta on a sloping basement into...
Article
Full-text available
A one-dimensional model that is able to store the stratigraphy emplaced by prograding bedforms with a downstream slip face is validated against experimental results. The laboratory experiment describes the migration of a Gilbert delta on a sloping basement into standing water, i.e. a condition in which the stratigraphy emplaced by the delta front (...
Article
La dinámica de las formas fluviales (morfodinámica) tiene cada vez más presencia en la planificación de los ríos, pero sus objetivos, alcance y métodos no están consolidados. El río Fluvià en Cataluña (NE de la península Ibérica) tiene una notable movilidad y en él se planea la restauración de meandros cortados por canalizaciones. Este artículo exp...
Article
Although the use of fluvial dynamics (morphodynamics) is increasingly used in the planning of rivers, the aims, scope and methods of morphodynamic studies have not been developed. The restoration of meanders cut by channels is planned for the Fluvia River in Catalonia (northeastern Iberian Peninsula), which is notably mobile. This papers explains w...
Article
Historical information on river degradation was used in a case study on the Gállego River, a tributary of the Ebro River, in northeastern Spain. The Gállego drains about 4000km2 of the southern slopes of the Pyrenees. Good channel surveys since the 1940s allowed a comparison of longitudinal bed profiles over time. Over this period about 1million m3...
Article
Full-text available
Zaragoza 2008, uno de los más visitados por el público de la muestra, se ha constituido en uno de sus iconos así como el símbolo de la Zaragoza del s. XXI. Diseña-do por la arquitecta iraquí Zaha Hadid, premio Pritzker de Arquitectura, ha supuesto un reto técnico sin pre-cedentes para la práctica totalidad de las especiali-dades implicadas en su ej...
Article
The paper deals with the risk of scouring at a very wide complex pier built within the channel of Ebro river at Zaragoza (Spain). The main points described in the paper are: the local scour problem, the characteristics of the phisical model used and the riprap apron able to stop scouring, as well as the execution and monitoring of this protection.
Article
Full-text available
El principal objectiu d'aquesta tesina ha estat el d'analitzar els efectes de les fissures i la seva propagació en el comportament mecànic d'un material quasi-fràgil com el formigó. Concretament tracta de la ruptura per tallant a Formigons Reforcats amb Fibres (FRF) en assajos de tipus "push-off" en probetes prismàtiques. L'anàlisi consta d'un estu...

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