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• Simulación de la onda de avenida por ruptura de tanque de enfriamiento

  O. Fuentes, M. Arganis, E. Bladé, M. Sánchez-Juny, F. Luna, J. Cruz, J. Mendoza, J. Aragón

  Tláloc AMH (2010). Vol. 46, pp. 1-11

  
  

  Abstract

  Se llevó a cabo la simulación de la ruptura del borde de un tanque de enfriamiento usando dos métodos: Uno de volúmenes finitos denominado CARPA y un algoritmo en diferencias finitas centradas. El algoritmo en volúmenes finitos CARPA utilizado con el pre y post procesador GiD mostró ser una herramienta muy poderosa en la animación de planicies de inundación, útiles en la interpretación de resultados tanto en el espacio como en el tiempo, para la protección civil, así como para definir las posibles zonas afectadas debido a fenómenos como el de la ruptura de bordos

  Abstract
  Se llevó a cabo la simulación de la ruptura del borde de un tanque de enfriamiento usando dos métodos: Uno de volúmenes finitos denominado CARPA [...]

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• Dam wall break simulation by means of a high resolution algorithm applied to the La Parota dam, Guerrero, Mexico.

  M. Sánchez-Juny, E. Bladé, J. Dolz, M. Arganis, Ó. Fuenes, V. Franco, F. Luna

  Ingeniería hidraúlica en México (2009). Vol. 24 (3), pp. 101-106

  
  

  Abstract

  This document presents a dam wall break simulation of the La Parota hydropower project in Guerrero, Mexico, by means of the CARPA system, which is based in a 2D WAF-TVD (Weight Averaged Flux-Total Variation Diminishing) high resolution finite volume numerical scheme. With the results, it is possible to produce maps containing water depth, flow velocity, and affected zones, which are useful in the civil protection field

  Abstract
  This document presents a dam wall break simulation of the La Parota hydropower project in Guerrero, Mexico, by means of the CARPA system, which is based in a 2D WAF-TVD (Weight [...]

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• Análisis del riesgo del transporte fluvial de los lodos mineros residuales del vertido de Aznalcóllar en el valle medio-bajo del río Guadiamar

  A. Benito-Calvo, G. Benito, F. Gallart, J. Martí-Vide, D. Regüés-Muñoz, E. Bladé

  Revista de la Sociedad Geológica de España (2001). Vol. 14 (1-2), pp. 89-100

  
  

  Abstract

  After de Aznalcóllar pyrite mine disaster (Seville, Spain) which caused the spilling of some 4.5 hm3 of acid water, the floodplains of the rivers Agrio and Guadiamar were rapidly cleaned of waste sludge.

  Abstract
  After de Aznalcóllar pyrite mine disaster (Seville, Spain) which caused the spilling of some 4.5 hm3 of acid water, the floodplains of the rivers Agrio and Guadiamar [...]

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• Hydrological and geomorphological criteria to evaluate the dispersion risk of waste sludge generated by the Aznalcollar mine spill (SW Spain)

  G. Benito, A. Benito-Calvo, F. Gallart, J. Martí-Vide, D. Regües, E. Bladé

  Environmental geology (2001). Vol. 40 (4-5), pp. 417-428

  
  

  Abstract

  Following the Aznalcóllar pyrite mine disaster (Seville, Spain) which caused the spilling of some 4.5 hm3 of acid water, the floodplains of the rivers Agrio and Guadiamar were rapidly cleaned of waste sludge. However, despite the efficiency of cleaning activities, there is still evidence of a fine superficial layer of sludge and some soil contamination, with the consequent risk of remobilisation of the pollutants by water erosion. There is much concern that these contaminated sediments may affect the precious ecosystems of the Doñana National Park and the Guadalquivir marshlands. This report describes the evaluation of the risk of mobilisation of the waste sludge through (1) detailed geomorphological analysis, indicating potential areas of erosion-sedimentation on the floodplains of the rivers Agrio and Guadiamar, and predicted dynamics of the waste sludge, and (2) evaluation of the potential dispersion of the waste sludge provoked by future flood events, including hydraulic calculations to model channel flow and the analysis of the texture of the sludge to obtain critical transport and sedimentation values. Findings suggest that the waste sludge is likely to be transported and deposited within the Doñana National Park during future flood events

  Abstract
  Following the Aznalcóllar pyrite mine disaster (Seville, Spain) which caused the spilling of some 4.5 hm3 of acid water, the floodplains of the rivers Agrio [...]

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• Dams and Reservoirs in the Lower Ebro River and Its Effects on the River Thermal Cycle

  J. Prats, J. Armengol, R. Marcé, M. Juny, J. Dolz

  (2010). The Ebro River Basin. The Handbook of Environmental Chemistry. Vol 13. Springer, Berlin, Heidelberg pp. 77-95

  
  

  Abstract

  River regulation can cause direct and indirect alterations in the river thermal cycle, which in turn may affect biological processes. In the lower Ebro River, two weirs (Ascó and Xerta) and a system of three dams (Mequinensa, Riba-roja, Flix) can be found. The weir of Ascó is used for the derivation of water to be used in the cooling system of a nuclear plant, which is returned later to the river and causing an increase of 3°C in the river water temperature. Instead, the weir of Xerta is used for the derivation of water for irrigation which most probably results in a diminution of the thermal inertia of the flowing water mass. On the other side, the system of reservoirs of Mequinensa, Riba-roja and Flix have a seasonal effect on water temperature. Water exiting the system of reservoirs is cooler than the river water entering them in spring and summer and is warmer in autumn and winter. Also, water temperature variability is reduced both in the daily and annual timescales. The reservoir of Riba-roja, receiving the contribution of two main affluents (Ebro and Segre), presents a most interesting hydrodynamic behaviour, that neither is typical lacustrine nor is that of a river. It has a variable pattern of circulation: in winter and early spring, the water column is mixed; in late spring and most of summer, the Segre River water flows above the Ebro River water; and in the rest of summer and most of autumn, the circulation pattern is inverse to the previous one, with the Ebro River water flowing above the Segre River water.

  Abstract
  River regulation can cause direct and indirect alterations in the river thermal cycle, which in turn may affect biological processes. In the lower Ebro River, two weirs (Ascó [...]

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• Incidencia de los embalses en el comportamiento térmico del rio

  J. Dolz, E. Herrero

  (1997). Efectos térmicos en presas y embalses, Ed: Colegio de Ingenieros de Caminos, Canales y Puertos (CIPP), pp. 9-237

  
  

  Abstract

  The river water maintains a heat exchange with the atmosphere and with the bottom; this process can reach its equilibrium along a stretch of the river with similar geologic and climatic characteristics. Its behavior can be modified by artificial effects, such as the use of the river water for the cooling of thermal power stations or by the presence of reservoirs. In the case of regions with Mediterranean climate, where the studied reservoirs are located, the effects of changes in the natural thermal regime caused by them produce a trend towards a constant seasonal thermal condition, an increase in daily uniformity, an increase in winter temperatures, and a decrease in summer temperatures. Water temperature is an important factor in the river's ecology, because it greatly conditions the life of fluvial communities. Downstream from power stations or dams, the water temperature evolves in such a way that tends to achieve equilibrium with the environment

  Abstract
  The river water maintains a heat exchange with the atmosphere and with the bottom; this process can reach its equilibrium along a stretch of the river with similar geologic [...]

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• Thermal response of Sanabria lake to global change (NW Spain)

  A. Ramos, J. Vega, A. Palau, J. Armengol, A. Casasola, A. Rodríguez-Martín, J. Dolz

  Limnética (2020). Vol. 39 (1), pp. 455-468

  
  

  Abstract

  Are large water bodies able to act as sensors of global change? As accumulators of water and heat, some of their thermal characteristics might be altered by long term (decadal) hydrometeorological changes and thus may be used as indicators of the effects of global change on fluvial ecosystems. This work focuses on the effect of global change (climate change plus water quantity and land use changes) in the internal organization of Sanabria Lake, specifically in its thermal annual cycle. The existence of temporal trends in the thermal behaviour of the lake was investigated based on the water temperature profiles are available since 1986. Data analyses include the non-parametric Mann-Kendall trend test and the Sen slope estimate to evaluate long term and seasonal patterns of hydrometeorological and in-lake thermal variables. The main results surprisingly point to a net lake cooling that could be explained by a stronger thermocline and a weaker vertical transfer of heat to the hypolimnion during the stratification period. These results contribute to understand and quantify the effects of global change on Iberian freshwater bodies

  Abstract
  Are large water bodies able to act as sensors of global change? As accumulators of water and heat, some of their thermal characteristics might be altered by long term (decadal) [...]

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• Modelling flood propagation in the service galleries of a nuclear power plant

  E. Bladé, M. Sanz-Ramos, J. Dolz, J. Expósito-Pérez, M. Juny

  Nuclear Engineering and Desing (2019). Vol. 352, pp. 1-10

  
  

  Abstract

  In the context of the stress tests that have to be applied to nuclear power plants, this work presents the study of the flooding processes of the service galleries of a nuclear plant caused by a hypothetical failure of some of the pipes of the Essential Services Water System (ESWS). To assess the flood propagation along the galleries, two-dimensional hydraulic modelling tools, based on the solution of the shallow water equations with the finite volume method, were used. Due to the complexity and special features of the geometry and hydraulic processes, when compared with more standard urban flood assessment works, several specific modules were developed. A relevant one is a new module to consider the effect of the occupation of the galleries on the advance of the waterfront. This module was developed and verified prior to being applied to a case study. The results show the suitability of the proposed methodology to be used as part of the stress tests to ensure high security standards of nuclear power plants.

  Abstract
  In the context of the stress tests that have to be applied to nuclear power plants, this work presents the study of the flooding processes of the service galleries of a nuclear [...]

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• Computational modelling of fine sediment relocation within a dam reservoir by means of artificial flood generation in a reservoir cascade

  E. Bladé, M. Juny, M. Bofill, J. Dolz

  Water Resources Research (2019). Vol. 55 (4), pp. 3156-3170

  
  

  Abstract

  Sediment relocation is a process where water turbulence moves deposits from shallower to deeper zones of a lake or reservoir. Additionally, in the context of a reservoir cascade relocation is a one of the possible sediment management strategies used to maintain the operational capacity of reservoirs. Numerical modelling tools applied to sediment dynamics can help to better understand the reservoir sedimentary processes and enhance the design of management strategies. This paper describes the detailed analysis of the cohesive sediment dynamics within a reservoir and a methodology for the calibration of numerical models for the management of sediment deposits through dam operation and upstream generation of artificial floods. The calibration process was based on an Accumulated Sediment Volume (ASV) curve and the usage of simplified models for an initial parameter estimation. The calibrated model has been applied to analyse different possibilities of sediment relocation strategies.

  Abstract
  Sediment relocation is a process where water turbulence moves deposits from shallower to deeper zones of a lake or reservoir. Additionally, in the context of a reservoir cascade [...]

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• Balances de agua y calor en la marisma de Doñana

  A. Ramos-Fuertes, J. Prats, J. Dolz

  Ingeniería del agua (2016). Vol. 20 (4), pp. 169-179

  
  

  Abstract

  Este trabajo expone los principales resultados del estudio de los balances hídrico y térmico de la marisma de Doñana. El estudio se ha basado en una amplia base de datos hidrometeorológicos tomados a intervalos de 10 minutos entre los años 2006 y 2011 por una red de seis estaciones de medida localizadas en áreas no vegetadas de la marisma. Esta información ha permitido caracterizar, a diferente escala temporal, el comportamiento térmico de la marisma mediante la modelización y análisis de los flujos de calor entre el agua y el suelo inundado, así como los procesos de transferencia de calor entre la superficie libre del agua y la atmósfera. Se ha puesto especial atención en la cuantificación de la evaporación, de la que depende en gran medida el proceso de vaciado de la marisma.

  Abstract
  Este trabajo expone los principales resultados del estudio de los balances hídrico y térmico de la marisma de Doñana. El estudio se ha basado en una amplia [...]

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