Results 191 to 200 of about 18,662 (221)

High-Speed Railway Bridge over the Ebro River, Spain

Structural Engineering International, 2003
The new railway bridge over the Ebro river in Spain that carries the high-speed line from Madrid through Zaragoza to the French border is described. The 546 m total span is divided into two areas: a 162 m approach span and the 384 m span over the river. The Vierendeel girder has a total depth of 9.15 m and a trapezoidal cross-section. The approach span
Javier Manterola Armisün, Antonio Martínez Cutillas, Josü Luis López Ruiz   +2 more
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TiO2-catalysed ozonation of raw Ebro river water

Water Research, 2000
Abstract This paper presents the results obtained with heterogeneous catalytic ozonation in which raw Ebro river (Spain) water is ozonated in the presence of titanium dioxide supported on alumina as a solid catalyst at two different O 3 :C weight basis ratios.
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Macroinvertebrate community in the lower Ebro river (NE Spain)

Hydrobiologia, 1994
We examine the macroinvertebrate community composition and dynamics in the last 60 km of the Ebro river (NE Spain). Different sampling methods (individual stones, Surber, kick samplers and artificial substrate) were used depending on the characteristics of the sites chosen (substrate, current velocity, saline influence).
Isabel Muñoz, Narcis Prat
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Geology and Geomorphological Evolution of the Ebro River Delta

2014
From a geological perspective, deltas are ephemeral geomorphic systems whose development is controlled by the sensitive equilibrium between fluvial sediment supply, global sea level, wave-induced energy and regional subsidence. Once this equilibrium is lost, the delta may start to retreat and eventually disappear. The ephemeral character of deltas is a
Luis Somoza, Inmaculada Rodríguez-Santalla   +1 more
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Mercury in Aquatic Organisms of the Ebro River Basin

2010
It is well known that chlor-alkali industry has traditionally used the mercury (Hg)-electrolysis process to produce mainly chlorinated solvents. Unfortunately, a fraction of the Hg used during production is released through drainage into the aquatic environment where it can be incorporated to biota.
Luis Carrasco, Josep M. Bayona, Sergi Díez   +2 more
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Third Millennium Bridge over the Ebro River. Zaragoza. Spain

IABSE Reports, 2008
<p>The way followed from conception to construction of this high strength white concrete arch bridge, an urban 216 m span bow-string arch bridge, is described in this paper. The approach to the city needs, the choice of type and material, the geometric design, the structural solution, the specific studies developed, and the bridge construction ...
Juan Jose Arenas, Guillermo Capellán, Hector Beade, Javier Martínez   +3 more
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Sediment Quality Evolution (2001–2011) in the Ebro River Basin (Spain)

Bulletin of Environmental Contamination and Toxicology, 2014
Spatio-temporal variations in sediment quality (20 sample sites) of the Ebro River basin between 2001 and 2011 have been assessed. The self-organizing map classified the sediment samples according to similarities in their chemical compositions. Its powerful visualization tools helped establish the main pollution contribution on each sample. Most of the
Oscar, Veses, Rosa, Mosteo, Maria P, Ormad, Jose L, Ovelleiro   +3 more
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Longitudinal development of chlorophyll and phytoplankton assemblages in a regulated large river (the Ebro River)

Science of The Total Environment, 2008
The distribution of chlorophyll and phytoplankton communities were compared to nutrient concentrations and hydrological parameters along the main stretch of the river Ebro. A progressive increase in planktonic chlorophyll was observed from the upper reaches to the middle section of the river.
Sergi, Sabater, Joan, Artigas, Concha, Durán, Miriam, Pardos, Anna M, Romaní, Elisabet, Tornés, Irene, Ylla   +6 more
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Global change impacts on river ecosystems: A high-resolution watershed study of Ebro river metabolism

Science of The Total Environment, 2016
Global change is transforming freshwater ecosystems, mainly through changes in basin flow dynamics. This study assessed how the combination of climate change and human management of river flow impacts metabolism of the Ebro River (the largest river basin in Spain, 86,100km(2)), assessed as gross primary production-GPP-and ecosystem respiration-ER.
Jonatan Val, David Chinarro, María Rosa Pino, Enrique Navarro   +3 more
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Tradeoffs in river restoration: Flushing flows vs. hydropower generation in the Lower Ebro River, Spain

Journal of Hydrology, 2014
Although the effectiveness of flushing floods in restoring basic environmental functions in highly engineered rivers has been extensively tested, the opportunity cost is still considered to represent an important limitation to putting these actions into practice. In this paper, we present a two-stage method for the assessment of the opportunity cost of
Carlos M. Gómez, C. Dionisio Pérez-Blanco, Ramon J. Batalla   +2 more
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