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  • Erosion resistance and behaviour of highly organic in-sewer sediment

     Seco, Raquel Irene; Gomez Valentin, Manuel; Schellart, A.; Tait, S.
    Water science and technology
    Date of publication: 2014
    Journal article

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    Reliable prediction of time-varying pollutant loads in combined sewer systems during storm periods can aid better management of the release of pollution into natural environments as well as enhancing storage tank design. Better understanding of the behaviour of sewer sediments is crucial for the development of models that adequately describe the transport of in-sewer solids and accurately predict the changes in pollutant concentration within combined sewers during storm events. This paper reports on the results of a test programme to examine the erosion of highly organic sewer sediment under the application of time-varying shear stress. The tests were carried out with and without supplying oxygen, and varying simulated dry-weather periods. The aim was to investigate the behaviour of real in-sewer sediment with a high organic content (around 80%) in an attempt to improve prediction of the transport rates under the particular Mediterranean conditions of long dry-period/build-up and intense rainfall/wash-off, and understand how this environment affects the erosional resistance and subsequent sediment release. Results have been compared with previous work on lower organic content sewer sediments and artificial organic sediment.

  • Pedestrian hazard criteria for flooded urban areas

     Russo, Beniamino; Gomez Valentin, Manuel; Macchione, Francesco
    Natural hazards
    Date of publication: 2013-10
    Journal article

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    Urban floods are sudden phenomena normally characterized by short flooding durations and devastating effects due to the high concentrations of persons, goods, and properties located in urban areas. In these cases, uncontrolled runoff can flow on urban streets, creating a significant hazard for pedestrians and vehicles. The safety of people can be compromised when they are exposed to flows that exceed their ability to remain standing or to traverse flow paths. With the aim of studying the stability of pedestrians in flooded street during storm events, a model representing an urban street in real scale was designed and built. Following a specific protocol that considering several flow rates (up to 500 l/s) and different longitudinal slopes (up to 10 %), 834 tests, using 23 human subjects, were carried out in good and poor light conditions. Hazard conditions were classified into three groups (low, medium, and high), and the parameters for which these conditions occurred were recorded. Results showed that for subjects weighing 50-60 daN (50-60 kg mass) and flow depths between 9 and 16 cm, velocities of 1.5-2 m/s can generate loss of stability due to phenomena of dragging or overturning. Empirical expressions were proposed to relate human subject characteristics (weight and height) and limiting flow conditions at which loss of stability occurs. © 2013 Springer Science+Business Media Dordrecht.

    Urban floods are sudden phenomena normally characterized by short flooding durations and devastating effects due to the high concentrations of persons, goods, and properties located in urban areas. In these cases, uncontrolled runoff can flow on urban streets, creating a significant hazard for pedestrians and vehicles. The safety of people can be compromised when they are exposed to flows that exceed their ability to remain standing or to traverse flow paths. With the aim of studying the stability of pedestrians in flooded street during storm events, a model representing an urban street in real scale was designed and built. Following a specific protocol that considering several flow rates (up to 500 l/s) and different longitudinal slopes (up to 10 %), 834 tests, using 23 human subjects, were carried out in good and poor light conditions. Hazard conditions were classified into three groups (low, medium, and high), and the parameters for which these conditions occurred were recorded. Results showed that for subjects weighing 50–60 daN (50–60 kg mass) and flow depths between 9 and 16 cm, velocities of 1.5–2 m/s can generate loss of stability due to phenomena of dragging or overturning. Empirical expressions were proposed to relate human subject characteristics (weight and height) and limiting flow conditions at which loss of stability occurs.

  • An adaptive predictive approach for river level forecasting

     Aguilar, Jose V.; Langarita, Pedro; Linares, Lorenzo; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Journal of hydroinformatics
    Date of publication: 2013
    Journal article

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    Efficient flood management requires accurate real-time forecasts to allow early warnings, real-time control of hydraulics structures, or other actions. Commercially available computing tools typically use hydraulic models derived from the numerical approximation of Saint-Venant equations. These tools need powerful computers, accurate knowledge of the riverbed topography, and skilled operators with a not insignificant hydraulic background. This paper presents an alternative approach in which the river basin is modeled as a network of cascade interconnected input-output systems. Each system is modeled by an adaptive predictive expert model, which provides real-time fast and accurate forecasts over a moving prediction horizon. The approach is evaluated using real data from the Ebro river basin in Spain. The main concluded advantages of the new approach are: (1) the formulation is simple with low computational burden; (2) it does not require topographic information on the river waterbeds; (3) the forecast may be performed autonomously.

  • Multivariable model predictive control of water levels on a laboratory canal

     Horväth, Klaudia; Galvis Restrepo, Eduard; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian; Van Overloop, P.J.
    Date of publication: 2013-08
    Book chapter

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  • Erosion resistance and behaviour of highly organic in-sewer sediment

     Seco, Raquel Irene; Gomez Valentin, Manuel; Schellart, Alma N.A.; Tait, Simon
    International Conference on Sewer Processes & Networks
    Presentation's date: 2013-08-28
    Presentation of work at congresses

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    The reliable prediction of time varying pollutant loads in combined sewer systems during storm periods can aid better management of the release of pollution into natural environments as well as enhancing storage tank design. Better understanding of the behaviour of sewer sediments is crucial for the development of models that adequately describe the transport of in-sewer solids and accurately predict the changes in pollutant concentration within combined sewers during storm events. This paper reports on the results of a test programme to examine the erosion of highly organic sewer sediment under the application of time varying shear stress. The shear stresses were related to flows into real sewers. The tests were carried out with and without supplying oxygen, and varying the length of time of the simulated dry-weather period. The aim was to investigate the behaviour of real in-sewer sediment with a high organic content (around 80%) in an attempt to improve prediction of the transport rates under the particular Mediterranean conditions of long dry-period/build-up and intense rainfall/wash-off, and understand how this environment affects the erosional resistance and subsequent sediment release. Results have been summarized and compared with previous work on lower organic content sewer sediments and artificial organic sediment.

  • Algoritmo "CSI: Canal Survey Information" para el seguimiento de los caudales extraídos en canales de regadío

     Soler Guitart, Joan; Bonet Gil, Enrique; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian; Gamazo, Pablo
    Jornadas de Ingeniería del Agua
    Presentation's date: 2013-10-23
    Presentation of work at congresses

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  • Calidad de aguas en tiempo de lluvia: estudio de una cuenca urbana en la región Mediterránea y calibración de un modelo hidrológico y de calidad en SWMM 5.0

     Seco, Raquel Irene; Gomez Valentin, Manuel
    Jornadas de Ingeniería del Agua
    Presentation's date: 2013-10-23
    Presentation of work at congresses

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  • GoRoSo: feedforward control algorithm for irrigation canals based on sequential quadratic programming

     Soler Guitart, Joan; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Journal of irrigation and drainage engineering
    Date of publication: 2013-01
    Journal article

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  • Experimental campaign to determine grated inlet clogging factors in an urban catchment of Barcelona

     Gomez Valentin, Manuel; Hidalgo Rabaseda, Guillem; Russo, Beniamino
    Urban Water Journal
    Date of publication: 2013-02
    Journal article

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  • Methodology to estimate the hydraulic efficiency of nontested continuous transverse grates

     Russo, Beniamino; Gomez Valentin, Manuel; Tellez Alvarez, Jackson David
    Journal of irrigation and drainage engineering
    Date of publication: 2013
    Journal article

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    The aim of this paper is to improve and complete the results presented in a previous work published on this journal about an experimental campaign focused on the hydraulic efficiency of continuous transverse grates for draining paved areas. This type of surface drainage structure is commonly used in urban or impervious areas (public squares, airport pavements, parks, and pedestrian areas), where conventional inlets are not recommended because they are rendered ineffective by the lack of a well-defined channelized flow path and gradients capable of directing flows toward the collecting hydraulic structures. In this paper, a methodology is presented to estimate the hydraulic efficiency of nontested continuous transverse grates. Empirical expressions are proposed to relate grate hydraulic performance to flow parameters and grate geometry without the need for laboratory tests. Moreover, the spectrum of the grates was extended in terms of dimensions and hydraulic design with respect to the first study, to enlarge the range of validity of the proposed empirical expressions.

    The aim of this paper is to improve and complete the results presented in a previous work published on this journal about an experimental campaign focused on the hydraulic efficiency of continuous transverse grates for draining paved areas. This type of surface drainage structure is commonly used in urban or impervious areas (public squares, airport pavements, parks, and pedestrian areas), where conventional inlets are not recommended because they are rendered ineffective by the lack of a well-defined channelized flow path and gradients capable of directing flows toward the collecting hydraulic structures. In this paper, a methodology is presented to estimate the hydraulic efficiency of nontested continuous transverse grates. Empirical expressions are proposed to relate grate hydraulic performance to flow parameters and grate geometry without the need for laboratory tests. Moreover, the spectrum of the grates was extended in terms of dimensions and hydraulic design with respect to the first study, to enlarge the range of validity of the proposed empirical expressions.

  • Application of the GoRoSo feedforward algorithm to compute the gate trajectories for a quick canal closing in the case of an emergency

     Soler Guitart, Joan; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian; Gamazo, Pablo
    Journal of irrigation and drainage engineering
    Date of publication: 2013-12
    Journal article

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    The canal delivery system in the Left Hemidelta area of the Ebro River in Spain consists of a tree-shaped net of open canals. The overall system can be quickly isolated in the case of an emergency by closing the upstream pool. Transients, in which the initial state is hydraulically far from the final state, are difficult to handle and cannot be made in only one gate movement in order to protect the canal lining. Therefore, they have to be as smooth as possible. GoRoSo is a feedforward control algorithm for irrigation canals based on sequential quadratic programming. With this tool, it is possible to calculate the gate trajectories that smoothly carry the canal from the initial state to the final state by keeping the water depth constant at checkpoints. The paper shows the efficient implementation of GoRoSo in both the closure and opening operations of the canal delivery system.

  • Comportamiento hidráulico de aliviaderos escalonados sin cajeros laterales en presas de HCR  Open access

     Estrella Toral, Soledad
    Defense's date: 2013-10-17
    Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya
    Theses

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    Tradicionalmente la construcción de aliviaderos escalonados en presas de hormigón compactado con rodillo (HCR) se caracteriza por la presencia de muretes guías que imponen un ancho constante a lo largo del aliviadero y que conducen el flujo desde la coronación hasta el pie. Dichos cajeros son construidos con encofrados trepantes específicos, utilizando hormigón vibrado y suponen una unidad de obra de costes y tiempos de ejecución significativos. En la literatura especializada se puede encontrar una amplia descripción del comportamiento hidráulico de rápidas escalonadas con cajeros laterales. Más recientemente se han encontrado algunos ejemplos de diseño de aliviaderos escalonados sin cajeros laterales. En este contexto, surge el proyecto ALIVESCA que ha sido el marco de la presente tesis doctoral. El proyecto ALIVESCA, y por tanto esta tesis, se iniciaron con el principal objetivo de caracterizar el comportamiento hidráulico de aliviaderos escalonados sin cajeros laterales en presas de HCR. El proyecto se plantea en base al estudio en modelo físico. El modelo ubicado en los laboratorios del Instituto Flumen, opera bajo la semejanza de Froude. Se construyó representando un aliviadero prototipo de altura de presa de 75 m, altura de escalón de 1.20 m, pendiente 0.8 y un paramento de ancho de 45 m, (escala 1:15). Los resultados del estudio se presentan en tres fases: la puesta a punto de la instalación experimental, el análisis del comportamiento hidráulico en ausencia de cajeros, y la definición de criterios de diseño de aliviaderos escalonados sin cajeros laterales. En la primera parte, se determina que el comportamiento del modelo es bidimensional, y que no existe un efecto de la rugosidad del modelo en la distribución lateral del caudal. Asimismo, se estudia la necesidad de un muro de acompañamiento del flujo en cabecera, cuya longitud se establece igual a la de una pila sobre la coronación de la presa (del orden de unos 10 m). Adicionalmente, como mayor aportación de esta fase de investigación, se define la existencia de dos zonas: una zona (cercana al eje de vertido) a lo largo del aliviadero donde el caudal específico se mantiene constante e igual al de vertido, es decir, su comportamiento es análogo al caso de la existencia de cajeros laterales, y una segunda zona afectada por la ausencia de los mismos. La coexistencia de estas dos regiones depende del caudal específico de vertido y del ancho del aliviadero. En la segunda parte, referente al comportamiento hidráulico del aliviadero sin cajeros, se analiza el efecto de su ausencia en la expansión lateral de la lámina de agua que se produce y, por tanto, en la disminución del caudal específico a lo largo y ancho de la rápida escalonada. Se determina que las variables que condicionan la expansión del flujo son: el caudal específico de vertido y la posición (altura) considerada. En base a ello, se propone un ajuste para predecir la distribución lateral del caudal en función de estas variables. En cuanto a la caracterización del flujo en la expansión lateral de la lámina de agua, se compara el comportamiento de diferentes variables hidráulicas en esta zona respecto del comportamiento que tiene lugar en la zona que no se ve afectada por la ausencia de cajeros. Las variables analizadas son: concentración media de aire, calado equivalente, campos de velocidad, concentración de aire y presión. Finalmente, se definen los criterios para el diseño de aliviaderos escalonados sin cajeros laterales en presas de hormigón compactado con rodillo y se plantean soluciones a la recogida al pie del aliviadero. Mención adicional merece la comparación de los resultados experimentales con los datos obtenidos del modelo numérico en 3D. El modelo numérico se basa en el método SPH y fue elaborado dentro del proyecto ALIVESCA por parte del Centro de Estudios Hidrográficos del CEDEX.

    Traditionally the construction of stepped spillways in roller compacted concrete dams (RCC) is characterized by the presence of sidewalls that imposes a constant width along the spillway and guides the flow from the crest to the toe. These sidewalls are built using vibrated concrete with a special climbing formwork, and therefore, imply significant time and cost of execution. In the specialized literature there is a comprehensive description of the hydraulic behavior of stepped chutes with sidewalls. More recently few examples of stepped spillways designed without sidewalls have been found. In this context arises the ALIVESCA project that has been the framework of the present thesis. The ALIVESCA project, and consequently this thesis, started with the main objective of characterizing the hydraulic behavior of stepped spillways without sidewalls in RCC dams. The main experimental project is based on the physical model study. The model located in Flumen Institute's laboratories, operates under the Froude similarity. It was constructed representing a 75 m dam height, 1.20 m step height, 0.8 slope and 45 m dam width (scale 1:15). The results of the study are presented in three phases: the initial phase of the experimental setup, the analysis phase with the aim of characterizing the hydraulic behavior the absence of sidewalls, and finally, a design criteria phase of stepped spillways without sidewalls. In the first part, the two-dimensional behavior of the model is determined, as well as, that there is no effect of the model roughness on the lateral distribution of flow. Also, the need of a guiding wall at the dam crest is studied; the length of this element corresponds to that of a pile on the crest of the dam (approximately 10 m). Moreover, an important contribution of this research phase was the definition of two areas: an area along the spillways (near the discharge axis) where the specific discharge remains constant and equal to the specific discharge at the entrance, i.e. the behavior of this area is analogous to the case with sidewalls, and a second area affected by the absence sidewalls. The coexistence of these two regions depends on the specific discharge and the spillway width. In the second part, the hydraulic behavior of the spillway without sidewalls is analyzed, as well as, the decrease of the specific discharge along and across the chute due to the flow lateral expansion. The variables that determine such decrease are: the specific discharge at the entrance and the position (height) considered. Thus, an adjustment is proposed to predict the flow distribution in terms of these variables. Regarding the flow characterization in absence of sidewalls, a comparison between behavior of this area and the not affected area is presented. The analyzed variables are: mean air concentration, equivalent water depth, velocity, air concentration and pressure fields. Finally, the design criteria of stepped spillways without sidewalls in RCC dams are defined, and collection solutions at the spillway toe are proposed. Additionally, the experimental results are compared with the data simulations of a 3D numerical model. The numerical model is based on SPH method and was developed within the ALIVESCA project by the Centro de Estudios Hidrográficos del CEDEX.

    Tradicionalment la construcció de sobreeixidors esglaonats en preses de formigó compactat amb corró es caracteritza per la presència de murets guia que imposen un ample constant al llarg del sobreeixidor i que condueixen el flux des de la coronació fins al peu de presa. Aquests caixers es construeixen amb encofrats trepants específics, utilitzant formigó vibrat i per tant suposen una unitat d'obra de costos i temps d'execució significatius. A la literatura especialitzada es pot trobar una àmplia descripció del comportament hidràulic de ràpides esglaonades amb murets laterals. Més recentment s'han localitzat alguns exemples de disseny de sobreeixidors esglaonats sense aquests. En aquest context sorgeix el projecte ALIVESCA que ha estat el marc de la present tesi doctoral. El projecte ALIVESCA, i per tant aquesta tesi, es van iniciar amb el principal objectiu de caracteritzar el comportament hidràulic de sobreeixidors esglaonats sense murets laterals en preses de formigó compactat amb corró. El projecte es plantejà sobre la base de l'estudi en model físic. El model situat als laboratoris de l'Institut Flumen, opera sota la semblança de Froude. Es va construir representant un sobreeixidor prototip d'altura de presa de 75 m, altura de graó d'1.20 m, pendent 0.8 i un parament de ample de 45 m, (escala 1:15). Els resultats de l'estudi es presenten en tres fases: la posta a punt de la instal·lació experimental, el anàlisi del comportament hidràulic en absència de murets, i la definició de criteris de disseny de sobreeixidors esglaonats sense caixers laterals. En la primera part, es determina que el comportament del model és bidimensional, i que no existeix un efecte de la rugositat del model en la distribució lateral del cabal. Igualment, s'estudia la necessitat d'un mur d'acompanyament del flux en capçalera, la longitud de la qual s'estableix igual a la d'una pila sobre la coronació de la presa (de l'ordre d'uns 10 m). Addicionalment, com a major aportació d'aquesta fase de recerca, es defineix l'existència de dues zones: una (propera a l'eix de vessament) al llarg del sobreeixidor en què el cabal específic es manté constant i igual al de vessament, és a dir, el seu comportament és anàleg al cas de l'existència de caixers laterals, i una segona zona afectada per la seva absència. La coexistència d'aquestes dues regions depèn del cabal específic de vessament i de l'ample del sobreeixidor. En la segona part, referent al comportament hidràulic del sobreeixidor sense caixers laterals, s'analitza l'efecte de la seva absència en l'expansió lateral de la làmina d'aigua que es produeix i, per tant, en la disminució del cabal específic al llarg de la ràpida esglaonada. Es determina que les variables que condicionen l'expansió del flux són: el cabal específic de vessament i la posició (altura) considerada. Així, es proposa un ajust per predir la distribució lateral del cabal en funció d'aquestes variables. Quant a la caracterització del flux en l'expansió lateral de la làmina d'aigua, es compara el comportament de diferents variables hidràuliques en aquesta zona respecte del comportament que té lloc a la zona que no es veu afectada per l'absència de caixers. Les variables analitzades són: concentració mitjana d'aire, calat equivalent, camps de velocitat, concentració d'aire i pressió. Finalment, es defineixen els criteris per al disseny de sobreeixidors esglaonats sense caixers laterals en preses de formigó compactat amb corró i es plantegen solucions per la recollida al peu del sobreeixidor. La comparació dels resultats experimentals amb les dades obtingudes del model numèric en 3D mereix una menció addicional. El model numèric es basa en el mètode SPH i va ser elaborat dins del projecte ALIVESCA per part del Centro de Estudios Hidrográficos del CEDEX.

  • Model predictive control of resonance sensitive irrigation canals.  Open access

     Horväth, Klaudia
    Defense's date: 2013-05-30
    Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya
    Theses

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    Saving water is an economic and ecological need. One way to save water is to reduce losses in irrigation networks by canal automation. The goal of canal automation is to make the right amount of water to at arrive in the right time. In order to achieve this goal, one of the ways is controlling the gates in the irrigation network by some control algorithm. In this work the control of a specific type of canal pools is studied: short and flat pools that are prone to resonance. The downstream water level control of this type of canals is investigated using the example of the 3-reach laboratory canal of the Technical University of Catalonia. Numerical and experimental studies are carried out to investigate the following: the choice of models for predictive control, the possibility to achieve offset-free control while using gravity offtakes and the best choice of control action variables. The objective of this work is to develop a well performing centralized model predictive controller (MPC) for the laboratory canal that is able to handle known and unknown setpoint changes and disturbances, and also to draw further conclusions about controller design for this type of canals. A recently developed model for resonant canals, the Integrator Resonance, is implemented and successfully tested experimentally for the first time. A new method to achieve offset free control for model predictive control is developed and tested numerically and experimentally. A choice of control variables are tested: As opposed to the discharge which is generally used as the control action variable, a state space model is formulated by using the gate opening as control variable without the need of water level measurement downstream of the gates. The results are summarized and conclusions are presented for control of short and flat canals that are prone to resonance.

  • Modelación numérica integrada de los procesos hidráulicos en el drenaje urbano.  Open access

     Aragón Hernández, José Luis
    Defense's date: 2013-07-02
    Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya
    Theses

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    El crecimiento continuo de las ciudades, o la ocurrencia de un evento extraordinario de lluvia, en muchas ocasiones sobrepasa las medidas de diseño de algunos de los elementos del drenaje urbano (principalmente elementos de captación y colectores) provocando que el sistema de drenaje de una población sea incapaz de desalojar el escurrimiento por dicho evento. El resultado final, es una inundación. Las consecuencias de ello son problemas de circulación para vehículos y personas, daños materiales, e incluso la pérdida de vidas humanas, en función principalmente de los valores de las variables hidráulicas como el calado y la velocidad del flujo. En este contexto, es clara la necesidad de contar con herramientas numéricas para reproducir dichos eventos y proponer actuaciones. Por este motivo, en este trabajo se presenta el desarrollo de un modelo numérico integrado uni/bidimensional, para el cálculo de los procesos hidráulicos que ocurren en el drenaje urbano de forma totalmente acoplada. Por un lado el drenaje urbano se compone de diferentes elementos y por el otro el modelo numérico integrado se forma de diferentes modelos numéricos, el resultado de ello y para efectos prácticos y de modelación numérica son modelos de tejados, calles, elementos de captación, conductos y unión de conductos. Cada modelo dispone de al menos una opción de modelación numérica, que permite calcular el proceso hidráulico en el elemento correspondiente. De esta forma, el modelo numérico integrado se puede utilizar de forma conjunta, o cada uno de los modelos de forma separada. El modelo de tejados emplea las ecuaciones de la onda cinemática en una dimensión y las ecuaciones de aguas poco profundas en dos dimensiones para modelar el proceso de transformación lluviaescurrimiento y la propagación del flujo en los tejados. Por su parte el modelo de calles únicamente emplea las ecuaciones de aguas poco profundas en dos dimensiones para calcular el proceso de transformación lluvia‐escurrimiento y la propagación del flujo en las calles. Es importante destacar que, para que la modelación sea más realista, el flujo proveniente de los tejados puede descargar ya sea de forma puntual o de forma uniforme tanto en las calles como en los colectores. En los colectores y en las uniones de una red de alcantarillado ocurren fenómenos hidráulicos complejos, de ahí que se cuente con diferentes alternativas para su cálculo. De esta forma, en el modelo de conductos, se emplean las ecuaciones de Saint Venant en una dimensión para el cálculo del flujo en lámina libre. Para el cálculo de flujo en presión se dispone de tres opciones: el método de la ranura de Preissmann, dos modelos de dos ecuaciones (ecuaciones de flujo en lámina libre y ecuaciones de flujo en presión): uno considera flujo incompresible en presión y otro flujo compresible en presión. Además, se dispone de una formulación para considerar el efecto que el aire atrapado (ya sea delante de un frente de onda de presión o entre dos frentes de onda de presión) tiene sobre la hidrodinámica del flujo. En el modelo de la unión de conductos se cuenta con dos aproximaciones: la formulación en una dimensión, empleada por la mayoría de modelos y una formulación en dos dimensiones basada en las ecuaciones de aguas poco profundas en dos dimensiones. La interacción entre el sistema de drenaje mayor (tejados, calles, áreas verdes, áreas grises, canales naturales y canales artificiales, etc.) y el sistema de drenaje menor (colectores, uniones, compuertas, etc.), conocida como drenaje urbano dual, es un proceso complejo pero fundamental, se realiza en los puntos físicos correspondientes a la localización espacial de los elementos de captación (fuentes y sumideros). De esta forma en el modelo de los elementos de captación, los caudales de intercambio de este proceso, se pueden estimar con la metodología Flumen y/o empleando las ecuaciones tipo orificio y vertedero. Desde el punto de vista numérico, para la solución de las ecuaciones de flujo en lámina libre en una dimensión, las ecuaciones de flujo en presión en una dimensión y las ecuaciones de aguas poco profundas en dos dimensiones, se emplean esquemas numéricos en volúmenes finitos, capaces de calcular discontinuidades y frentes de onda en la solución, sin necesidad de técnicas adicionales. En cambio, para la solución de las ecuaciones de la onda cinemática en una dimensión, se utiliza un esquema en diferencias finitas. Además, se usa el método de las características para la imposición de condiciones de contorno y el método de Newton‐Raphson para la solución de sistemas de ecuaciones no lineales. Para cada uno de los modelos numéricos implementados en primer lugar se evalúa su funcionamiento y desempeño, posteriormente se valida y en algunos casos se realiza alguna aplicación, primero de forma separada y posteriormente empleando más de un modelo numérico Para ello, se emplean casos de referencia, resultados de otros modelos numéricos, soluciones analíticas y ensayos de laboratorio existentes en la literatura técnica. Los resultados de este proceso indican que los modelos numéricos son capaces de reproducir de forma aceptable y con un nivel de precisión adecuado los tipos de flujo modelados: flujo en lámina libre en régimen lento y en régimen rápido, flujo en presión positiva y negativa, además de las transiciones que se pueden presentar entre estos flujos, como frente seco mojado y cambio de flujo en lámina libre a flujo en presión (flujo mixto), incluso con la presencia de aire atrapado. Por otra parte, el modelo numérico integrado se aplica a dos cuencas urbanas totalmente distintas entre sí, por su geometría, las características de los elementos del drenaje urbano, y las condiciones y variedad de flujos que ocurren. Los resultados obtenidos permiten decir que el modelo es capaz de resolver esta variedad de flujos de forma razonable y funcionar de forma integrada entre los elementos del drenaje urbano. Ello permite pensar que, el modelo numérico integrado se puede utilizar en el cálculo de los procesos hidráulicos del drenaje urbano, con un desempeño satisfactorio.

    Due to the continuous growth of the cities and the extreme rain events, the design of current urban drainage systems may not be adequate (especially inlet elements and sewer pipes), and this can result in the fact that these urban drainage systems are not able any more to evacuate the runoff. The final result is flood. The consequences of this can be problems transport and material damages, including loss of human lives, depending on the velocity and level of water. In this context, it is clear that new numerical tools are needed in order to reproduce these events and propose actions. For this reason, this work presents a completely coupled one/two‐dimensional numerical model to calculate hydraulic processes that occur in urban drainage. Urban drainage includes different elements that are integrated in the numerical model, like roofs, streets, inlet elements, pipes and junctions. Therefore, there is at least one numerical model for every element, which allows to calculate the corresponding hydraulic process. In this way, the integrated numerical model can be used together, or part by part, as separated models for each element. The model of the roofs uses the one dimensional kinematic wave equations and the two‐dimensional shallow water equations to model the rainfall‐runoff transformation process and the propagation of the flow over the roofs. The model for the streets only uses the two‐dimensional shallow water equations in order to calculate the rainfall‐runoff transformation process and the propagation of the flow in the streets. It is important to mention, in order to be more realistic, that the flow from the roofs can discharge either in punctual or uniform mode either on the streets or in the sewer pipes. In the sewer pipes and in the junctions of the sewage system, complex hydraulic phenomena occur, therefore there are different options for calculation. For the model of the pipes, to calculate the free surface flow the one dimensional Saint‐Venant equations are used. For the calculation of the pressurized flow there are three options: the Preissmann slot method and two models with two equations (equations of free‐surface flow and equations of pressurized flow): one considering the pressurized flow to be incompressible and the other considers it compressible. Moreover, there is a formulation for the effects of the air that is trapped (it can be trapped in front of a pressure wave or between two wave fronts of pressure waves). The model of the junctions has two approximations: a one dimensional approximation conventionally used by other models and formulation in two dimensions based on the shallow water equations. The interactions between the major (roofs, streets, green areas, grey areas, natural canals and artificial canals) and the minor drainage system (sewer pipes, junctions, gates, etc.) known as urban dual drainage is a complex but fundamental process that occurs in some physical points: sources and sinks. The discharges through the inlet elements can be approximated by the Flumen methodology or using the orifice or weir equations. From the numerical point of view, the solution of the one dimensional Saint Venant equations, the one dimensional pressurized flow equations and the two dimensional shallow water equations are solved by finite volumes numerical schemes, which are able to calculate discontinuities and wave fronts in the solution without the need of additional techniques. On the other hand, for the solution of the one dimensional kinematic wave equations a finite differences scheme is used. Moreover, the method of characteristics is used in order to impose boundary conditions and the Newton‐Raphson method is used to solve non‐linear systems of equations. For each numerical model the results and the performance are evaluated and later validated, first each model separately and then together. In order to do this, reference cases, results of other numerical models, analytical solutions and laboratory experiments existing in the technical literature are used. The results of this process show that the numerical models are able to reproduce in an acceptable way and with an adequate level of precision the different types of flow: free surface flow in subcritical/supercritical regime, flow under negative or positive pressure and the transitions that can be present between these flow types: dry‐wet front and change from free surface flow to pressurized flow (mixed flow) including the presence of trapped air. On the other hand, the integrated numerical model is used in two completely different urban catchments. These catchments have different geometries, different elements of urban drainage and different conditions and flows. The obtained results show that the model is able to solve properly this variety of flows and it can account for the different elements of urban drainage in a coupled way. This leads to the conclusion that the integrated numerical model can be used in the calculation of the hydraulic processes taking place in urban drainage with satisfactory performance.

  • Multivariable model predictive control of water levels on a laboratory canal

     Horväth, Klaudia; Van Overloop, P.J.; Galvis Restrepo, Eduard; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    New Frontiers of Simulation
    Presentation's date: 2012-09-12
    Presentation of work at congresses

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    Automatic control of irrigation canals can reduce the loss of water in considerable amounts, therefore it is generating ecologic and economic benefits. There have been many different types of automatic controllers developed, but only few of them had the opportunity of being tested on the field due to the long delay time and the inconveniences of interrupting the operation of the irrigation. Therefore, the automatic controllers developed for large irrigation canals should be tested before by means of numerical simulations and/or laboratory experiments. The Technical University of Catalonia possesses a laboratory irrigation canal with the length of 220m, with 3 motorized gates, and 11 level sensors that are connected to a SCADA system. This facility makes it possible to test controllers of any type, since all the instrumentation and real time operation runs within a flexible working environment running in Matlab-Simulink . The canal can be configured from one pool to three pools, which allows the development of multivariable control. A numerical model of the canal has been developed using the 1D hydrodynamic model SIC. With the help of this software it is possible to simulate the hydraulics of the canal and, due to the link between SIC and Matlab, also to test any controller developed previously in the Matlab environment. In this work a centralized multivariable model predictive controller for water levels is developed and validated by means of numerical simulation.

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    Transporte de sedimentos depositados en tiempo seco en alcantarillado unitario : Estimación mediante SWMM 5.0  Open access

     Seco, Raquel Irene; Gomez Valentin, Manuel
    Congreso Latinoamericano de Hidráulica
    Presentation's date: 2012-09-11
    Presentation of work at congresses

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    Los vertidos desde alcantarillado unitario durante eventos de tormenta pueden afectar significativamente los estándares de calidad de los medios naturales receptores. Estudios previos apuntan que la principal fuente de contaminantes está asociada a la erosión y resuspensión de sólidos que se depositan dentro de los conductos en el periodo seco antecedente a la precipitación. La predicción de sólidos que se movilizan desde el interior de las conducciones por el escurrimiento de aguas pluviales puede resultar en importantes beneficios tanto en la gestión de la contaminación de medios naturales como en el diseño de depósitos de retención. Los modelos de calidad desarrollados hasta ahora plantean formulaciones de compleja aplicación, o bien proponen el cálculo aproximado pero con una gran cantidad de variables. En este trabajo se presenta la implementación de una etodología conceptual basada en el modelo de calidad de SWMM5.0 que, con pocos parámetros , permita la valoración de la carga sólida movilizada desde los depósitos en el interior de las conducciones durante un evento de precipitación. Así, esta metodología supone una ampliación en la capacidad de trabajo de SWMM5.0 para la obtención de la evolución de la carga sólida total, al contemplar el proceso en el interior de las conducciones que actualmente no considera. Resultados iniciales muestran el potencial de su aplicación.

  • The effect of the choice of the control variables of the water level control of open channels: comparison of control schemes using the ASCE Test canal 2

     Horvath, Klaudia; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    IEEE International Conference Networking, Sensing and Control
    Presentation's date: 2012-04
    Presentation of work at congresses

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    The effect of the choice of the control action variables on centralized water level controllers for open channels is analyzed. Three models are compared. In the first model the control action variable is the discharge and then the inverse gate equation is used to calculate the gate openings. In the second case the control action variable is the gate opening and that is incorporated to the canal model - supposing that the upstream water levels of each pool are known. In the third case control variables are also the gate openings but the upstream water level of each canal pool is unknown, they are calculated by the models by using the hydraulic relationships between the variables. These three models are discussed and compared through an example of centralized Linear Quadratic Regulator (LQR) controller using as example the Test canal 2 of the ASCE.

  • Integration of 1D and 2D finite volume schemes for computations of water flow in natural channels

     Blade i Castellet, Ernest; Gomez Valentin, Manuel; Dolz Ripolles, Jose; Aragón Hernández, José Luis; Corestein Poupeau, Georgina Teresa; Sanchez Juny, Marti
    Advances in water resources
    Date of publication: 2012-06
    Journal article

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  • Modelling impacts of climate change on water resources in ungauged and data-scarce watersheds: application to the Siurana catchment (NE Spain)

     Candela, Lucila; Tamoh, Karim; Olivares Cerpa, Gonzalo; Gomez Valentin, Manuel
    Science of the total environment
    Date of publication: 2012-12-01
    Journal article

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  • Introducing dynamics and control to civil engineers through an experimental flume

     Mantecon Baena, Juan Antonio; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Journal of professional issues in engineering education and practice
    Date of publication: 2012
    Journal article

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  • Source term treatment of SWEs using the surface gradient upwind method

     Blade i Castellet, Ernest; Gomez Valentin, Manuel; Sanchez Juny, Marti; Dolz Ripolles, Jose
    Journal of hydraulic research
    Date of publication: 2012-08
    Journal article

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    Modelación numérica del flujo mixto y bolsas de aire atrapado en colectores pluviales  Open access

     Aragón Hernández, José Luis; Blade i Castellet, Ernest; Gomez Valentin, Manuel
    Jornadas de Ingeniería del Agua
    Presentation's date: 2011-10-05
    Presentation of work at congresses

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    [...] En este trabajo para simular numéricamente flujo mixto se presenta un modelo que se clasifica dentro de los modelos dinámicos que utiliza dos sistemas de ecuaciones considerando flujo incomprensible, por lo que para considerar el almacenamiento debido a la presión permite un comportamiento elástico de la tubería. Por otro lado, para modelar y propagar numéricamente las bolsas de aire atrapado con liberación del mismo, se emplea la ley de gas ideal asumiendo un proceso isotérmico- La solución numérica de las ecuaciones se realiza con la técnica de los volúmenes finitos a través del método de Godunov y el Riemann Solver de Roc. Por otra parte, de las campañas realizadas en el Laboratorio de Hidráulica del DEHMA, UPC, para estudiar la entrada en presión se seleccionó un experimento y se reprodujo con el modelo numérico de flujo mixto con y sin la formulación de la fase aire, la carga de presión calculada fue comparada con la medida y de esta manera evaluó la actuación del modelo.

    Postprint (author’s final draft)

  • Irrigation canal models for automatic control purposes  Open access

     Horväth, Klaudia; Galvis Restrepo, Eduard; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Jornada de Recerca i innovació a l'Escola de Camins
    Presentation's date: 2011-11-15
    Presentation of work at congresses

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    volumes during normal canal operation. In order to develop control algorithms for irrigation canals there is a need for simple linear models to be used in the algorithms. The following simple linear models are approximating the canal in order to give a base to develop control algorithms. The PAC-UPC laboratory canal (Prueba de Algoritmos de Control - Universitat Politècnica de Catalunya) is modelled (input and output discharge) using the following three models: Muskingum, Hayami and Integrator Delay Zero (IDZ) and the results are compared to measurements. All three models are able to describe the irrigation canal in an acceptable way. However, only the IDZ model can capture all the important characteristics. These tested models can be applied to represent real canals for control purposes where it is especially important to obtain good models without extensive measurements. Test campaigns are developped now in cooperation with the CHE (Confederación Hidrográfica del Ebro) in order to test control algorithms to be used in irrigation canals under their management.

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    Aplicación del modelo SWMM 5.0 para la estimación del arrastre de depósitos de sedimentos y contaminantes asociados en sistemas de alcantarillado unitario  Open access

     Seco, Raquel Irene; Gomez Valentin, Manuel
    National Young Water Professionals Conference
    Presentation's date: 2011-06-16
    Presentation of work at congresses

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    veles de partículas sólidas y otros contaminantes se observan en los caudales vertidos desde sistemas unitarios al medio fluvial receptor durante el período inicial de una tormenta. Las investigaciones en este campo sugieren que la principal fuente de estos contaminantes está vinculada al proceso de erosión y resuspensión de sólidos depositado s en los conductos del sistema durante el periodo seco antecedente al evento de precipitación. Este trabajo aborda el desarrollo de una metodología capaz de tratar, en una primera aproximación, el transporte de sedimentos dentro de las conducciones de un sistema de alcantarillado unitario. Su implementación se basa en la aplicación modificada, de un modelo del sistema, en el software de dominio público Storm Water Management Model (SWMM 5.0). Así, esta metodología supone una ampliación en la capacidad de trabajo del mencionado programa de simulación, al contemplar el proceso de erosión y re-suspensión de sólidos preexistentes en el interior de sistemas unitarios, que hasta ahora no se considera. Los resultados obtenidos en un estudio piloto, demuestran la aplicabilidad de la metodología de aproximación para la obtención de la evolución de la carga sólida total y contaminantes asociados, durante un evento de tormenta.

    Postprint (author’s final draft)

  • Simplified modeling of a laboratory irrigation canal for control purposes

     Galvis Restrepo, Eduard; Horväth, Klaudia; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Seminar for Advanced Industrial Control Applications
    Presentation's date: 2011-11
    Presentation of work at congresses

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    http://upcommons.upc.edu/e-prints/bitstream/2117/15391/1/SAICA2011_proceedings.pdf

  • Prueba de algoritmo de control automático en un canal de laboratorio y un canal simulado

     Horväth, Klaudia; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian; Galvis Restrepo, Eduard
    Jornadas de Ingenieria del Agua
    Presentation's date: 2011-10-05
    Presentation of work at congresses

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  • An adaptive predictive approach for river level forecasting

     Aguilar, Jose Vicente; Langarita, Pedro; Linares, Lorenzo; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    International Conference on Networking, Sensing and Control
    Presentation's date: 2011-04-11
    Presentation of work at congresses

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    Efficient flood management requires accurate real time forecasts to allow early warnings, real time control of hydraulics structures or other actions. Commercially available computing tools typically use, for flow or level forecasting, hydraulic models derived from the numerical approximation of Saint-Venant equations. These tools need powerful computers, accurate knowledge of the riverbed topography and skilled operators with some hydraulic background. This paper presents an alternative approach in which the river network is modeled as a cascade of interconnected input-output systems. Each system is modeled by an adaptive predictive expert model, which provides real-time fast and accurate forecasts over a moving prediction horizon. The main advantages of the approach are: (1) simplicity in the formulation and low computational burden; (2) no need of topographic information on the river waterbeds; (3) operators do not need strong hydraulic knowledge and the forecast may be done autonomously. The approach is evaluated using real data from the Ebro river basin in Spain.

  • Methodology to estimate hydraulic efficiency of drain inlets

     Gomez Valentin, Manuel; Russo, Beniamino
    Proceedings of the Institution of Civil Engineers. Water management
    Date of publication: 2011-02
    Journal article

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  • Experimental study of subcritical dividing flow in an equal-width four-branch junction

     Nania Escobar, Leonardo Santos; Gomez Valentin, Manuel; Dolz Ripolles, Jose; Pomares Abad, Juan; Comas, Pau
    Journal of hydraulic engineering (New York, N. Y.)
    Date of publication: 2011-10
    Journal article

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  • An algorithm for the design of a feedforward controller in canals

     Soler Guitart, Joan; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Revista internacional de métodos numéricos para cálculo y diseño en ingeniería
    Date of publication: 2011
    Journal article

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  • Desarrollo de un modelo de simulación de flujo en ríos

     Blade i Castellet, Ernest; Cea, Luis; Corestein Poupeau, Georgina Teresa; Aramburu, Enrique; Lara, Ángel; Puertas Agudo, Jerónimo; Gomez Valentin, Manuel; Dolz Ripolles, Jose; Balairón, Luis
    Date of publication: 2011
    Book chapter

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  • Estudio hidrológico y movimiento de sedimentos del rio Valira (Principado de Andorra)

     Sanchez Tueros, Hans Paul; Gomez Valentin, Manuel; Blade i Castellet, Ernest
    Date of publication: 2011
    Book chapter

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  • Estudio numérico-experimental del flujo de agua en un cruce de calles

     Blade i Castellet, Ernest; Nania Escobar, Leonardo Santos; Gomez Valentin, Manuel
    Date of publication: 2011
    Book chapter

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  • Aproximación al drenaje dual urbano 1D/1D

     Concha Jopia, Rodrigo Francisco; Gomez Valentin, Manuel
    Date of publication: 2011
    Book chapter

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  • Modelización y estudio de un depóstio anticontaminación en la ciudad de Reus

     Concha Jopia, Rodrigo Francisco; Gomez Valentin, Manuel
    Date of publication: 2011
    Book chapter

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  • Design of surface drainage systems according to hazard criteria related to flooding of urban areas

     Russo, Beniamino
    Defense's date: 2010-01-15
    Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya
    Theses

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    Modelo físico para el estudio de los criterios de riesgo en zonas urbanas  Open access

     Gomez Valentin, Manuel; Macchione, Francesco; Russo, Beniamino
    Congreso Latinoamericano de Hidráulica
    Presentation's date: 2010-11-22
    Presentation of work at congresses

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    Las inundaciones en medio urbano son fenómenos que generalmente se caracterizan para su corta duración y para los efectos devastadores debido a la alta concentración de personas, viviendas y bienes localizados en estas áreas. En casos de inundaciones producidas por eventos de lluvias extremos, los caudales de escorrentía pueden circular por las calles de nuestras ciudades de forma incontrolada si el sistema de drenaje superficial o subterráneo es insuficiente generando condiciones de inseguridad para la circulación vehicular y peatonal. Con el fin de estudiar las condiciones de estabilidad de peatones en calles urbanas durante eventos de lluvia, se ha diseñado y realizado un modelo físico que reproduce una calle urbana en escala real. De acuerdo con las capacidades de laboratorio, el protocolo de ensayo establecido ha previsto caudales circulantes hasta 500 l/s y pendientes longitudinales de la calle hasta el 10%. Finalmente se han desarrollado 834 ensayos con 23 sujetos de riesgo en diferentes condiciones de visibilidad y se han recopilados todas las situaciones de riesgo registradas en tres grupos relacionados al nivel de riesgo ocurrido durante los ensayos: bajo, medio y alto riesgo. Los resultados obtenido han evidenciado que para sujetos humanos entre 50 y 60 Kg, y calados entre 9 y 16 cm, velocidades de 1.5-2 m/s pueden suponer una pérdida de estabilidad por efecto de fenómenos como vuelco y deslizamiento. Urban floods are sudden phenomena normally characterized by short flooding durations and devastating effects due to the high concentration of subjects, goods and properties located in urban areas. In these cases of flooding heavy and medium storms events (some times because of inadequate surface drainage systems) generate high uncontrolled amounts of surface runoff that circulate on the urban streets determining a significant hazard for the pedestrians and vehicles. With the aim of studying the stability of the pedestrians in urban areas during storm events, a model representing an urban street in a 1:1 scale, was designed and built. According to the laboratory capabilities a specific testing protocol was established. Specifically tests were carried out for different circulating flows (from 100 l/s to 500 l/s) and different longitudinal slopes (up to 10%). Finally 834 tests regarding 23 human subjects were carried out considering different light conditions too. Hazard conditions were classified into three groups: low, medium and high and parameters at which these conditions occurred were recorded. The obtained results showed that for a human subject with a weight between 50 and 60 Kg, and flow depths between 9 and 16 cm, velocities of 1.5-2 m/s can generate a loss of stability due to phenomena of dragging or overturning.

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    Estudio de los patrones de colmatación en los sumideros de una cuenca urbana de Barcelona (España)  Open access

     Gomez Valentin, Manuel; Hidalgo Rabaseda, Guillem; Russo, Beniamino
    Congreso Latinoamericano de Hidráulica
    Presentation's date: 2010-11-24
    Presentation of work at congresses

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    Dentro del sistema de drenaje de una ciudad, el sistema de sumideros es el encargado de introducir en la red de alcantarillado las aguas de escorrentía producidas por las tormentas caídas. El diseño de dicho sistema de sumideros, la elección de los modelos adecuados y su ubicación es uno de los puntos fundamentales del sistema de drenaje. La hidráulica de estos sumideros ha recibido atención en los últimos años y cada vez más los fabricantes proporcionan la capacidad hidráulica de captación de cada sumidero. Pero estos datos suelen ser considerando agua limpia, mientras que en la realidad de la cuenca, numerosos sumideros pueden estar total o parcialmente colmatados, hecho que debería ser tenido en cuenta en los diseños. En este trabajo, se presenta una metodología para considerar los efectos hidráulicos sobre el sumidero derivados de la colmatación. A partir de una inspección de los sumideros de una cuenca, se buscan patrones de colmatación, formas repetitivas observadas en la colmatación de los sumideros, y la frecuencia de ocurrencia de los mismos. Se somete a ensayo hidráulico el sumidero colmatado, obteniéndose la cantidad de agua que puede ser captada por cada uno de ellos, y obteniéndose así el factor de reducción en la capacidad de captación a aplicar a cada uno de los patrones de colmatación y que puede ser utilizado en los estudios hidráulicos de escorrentía en la ciudad.

  • Una instalación en la Universidad Politécnica de Catalunya para la automatización de canales de riego

     Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Automática e instrumentación
    Date of publication: 2010-02
    Journal article

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  • Estudio hidráulico para el Plan de Emergencia del canal de la margen izquierda del Delta del Ebro

     Soler Guitart, Joan; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Ingeniería del agua
    Date of publication: 2010
    Journal article

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  • Teaching Control of Irrigation Canals to Non System Engineers

     Mantecon Baena, Juan Antonio; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    International journal of engineering education
    Date of publication: 2010
    Journal article

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  • Experimental and numerical modelling of symmetrical four-branch supercritical cross junction flow

     Nania Escobar, Leonardo Santos; Gomez Valentin, Manuel; Dolz Ripolles, Jose; León, Arturo S.
    Journal of hydraulic research
    Date of publication: 2010-12
    Journal article

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  • Methodologies to study the surface hydraulic behaviour of urban catchments during storm events

     Gomez Valentin, Manuel; Macchione, Francesco; Russo, Beniamino
    Water science and technology
    Date of publication: 2010-06
    Journal article

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    Une bonne connaissance du comportement hydraulique d'un bassin versant urbain et de ses écoulements en surface (avaloirs) représente une exigence essentielle pour garantir la sécurité du trafic et des piétons, ainsi qu’une gestion correcte du système d’assainissement. Dans de nombreux cas, la disposition des avaloirs se fait selon des critères de densité spatiale. En effet, un emplacement plus rationnel des avaloirs des bassins versants urbains doit être défini sur la base d’une analyse hydraulique précise de la relation entre les écoulements de rues et l’efficience hydraulique des avaloirs. Pour ce faire, on doit utiliser des données expérimentales et autres procédures qualifiées. De plus, nous manquons de critères de danger spécifiques en termes de hauteur d'eau et de vitesse d’écoulement maximum acceptables dans les rues sans risque pour les piétons. Cet article présente les résultats de deux campagnes expérimentales différentes. La première a été effectuée pour évaluer l’efficience hydraulique des avaloirs ; la seconde pour étudier la stabilité des piétons dans des conditions d’inondation urbaine. L’objectif était de proposer de nouveaux critères de danger. Sur la base des résultats expérimentaux, une méthodologie a été développée pour évaluer le risque d’inondation dans des zones urbaines au cours d’évènements pluvieux. Si l’on dispose d’une représentation topographique précise des zones urbaines, il est possible d’effectuer une simulation numérique 2D d’inondation urbaine au moyen d’équations complètes sur les eaux peu profondes. Grâce à cette approche, il est possible de calculer avec précision les rejets absorbés par les avaloirs au moyen de formules de rendement hydraulique. De cette manière, on peut élaborer des cartes de danger détaillées. Cet article présente une application numérique réalisée dans une rue de Barcelone. // A good knowledge of the hydraulic behaviour of an urban catchment and its surface drainage system is an essential requirement to guarantee traffic and pedestrian safety. In many cases, inlets have been situated according to spatial density criteria. Indeed a more rational location of inlets on urban catchments must be defined according to an accurate analysis of the relationship between street flow and inlet hydraulic efficiency. Moreover we lack specific hazard criteria in terms of the maximum acceptable flow depths and velocities on the streets that do not cause problems to pedestrians. In this paper the results of two different experimental campaigns are presented. The first was carried out to evaluate inlet hydraulic efficiency; the second was carried out to address the pedestrian stability in urban flood conditions, whose aim was to propose new hazard criteria. On the basis of the experimental results, a methodology was developed to assess flood hazard in urban areas during storm events. If a refined topographic representation of urban areas is available, a two-dimensional numerical simulation of urban flooding can be performed using complete shallow water equations. According to this approach a numerical application for flood hazard assessment in a street of Barcelona is shown.

  • Propuesta de operación mediante control pasivo del canal Xerta-Sénia

     Soler Guitart, Joan; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Ingeniería del agua
    Date of publication: 2010
    Journal article

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  • Estudio hidrológico y moviento de sedimentos del río Valira (Principado de Andorra)

     Sanchez Tueros, Hans Paul; Gomez Valentin, Manuel; Blade i Castellet, Ernest
    Seminario RLHE sobre las Líneas Prioritarias de investigación de la Red
    Presentation's date: 2009-02-23
    Presentation of work at congresses

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  • Propuesta de diseño constructivo de un canal de regadío para suministro de agua a la demanda y con un régimen altamente variable de entrada al sistema por cabecera

     Soler Guitart, Joan; Gomez Valentin, Manuel; Rodellar Benede, Jose Julian
    Jornadas de Ingeniería del Agua
    Presentation's date: 2009-10-28
    Presentation of work at congresses

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  • Modelización y estudio de un depósito anticontaminación en la ciudad de Reus

     Concha Jopia, Rodrigo Francisco; Gomez Valentin, Manuel
    Seminario RLHE sobre las Líneas Prioritarias de investigación de la Red
    Presentation's date: 2009-06-18
    Presentation of work at congresses

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  • Aproximación al drenaje dual urbano 1D/1D.

     Concha Jopia, Rodrigo Francisco; Gomez Valentin, Manuel
    Seminario RLHE sobre las Líneas Prioritarias de investigación de la Red
    Presentation's date: 2009-06-18
    Presentation of work at congresses

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  • Access to the full text
    Una aproximación a la modelización del drenaje dual urbano mediante EPA SWMM 5.0  Open access

     Concha Jopia, Rodrigo Francisco; Gomez Valentin, Manuel
    Jornadas de Ingeniería del Agua
    Presentation's date: 2009-10
    Presentation of work at congresses

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    El estudio y análisis del comportamiento hidráulico de la red superficial de drenaje (calles) y de la red soterrada (alcantarillado), y la interacción entre ambas a través del intercambio de flujos se conoce como Drenaje Dual Urbano, y es un interesante punto de vista dentro de la investigación en drenaje urbano, pues considera la modelización simultánea de las dos redes hidráulicas interconectadas dinámicamente entre sí. En este trabajo se presenta una metodología para modelizar el drenaje dual urbano usando el código de cálculo EPA SWMM 5.0. Esta metodología se focaliza en representar de forma acoplada la calle y el colector que subyace bajo ella. Al mismo tiempo, se consideran los elementos (rejas de captación, sumideros, imbornales, pozos) donde se produce el intercambio de flujo bidireccional, representados por objetos reguladores de flujo de EPA SWMM 5.0. Esta metodología se aplica a un caso particular, donde se realiza una comparación con la aproximación tradicional que presenta EPA SWMM 5.0 para considerar el flujo en superficie.