Aigues de Barcelona AGBAR

Barcelona, Spain

Aigues de Barcelona AGBAR

Barcelona, Spain
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Canedo-Arguelles M.,University of Barcelona | Grantham T.E.,University of California at Davis | Perree I.,University of Barcelona | Rieradevall M.,University of Barcelona | And 2 more authors.
Environmental Pollution | Year: 2012

Salinization is a major and growing threat to freshwater ecosystems, yet its effects on aquatic invertebrates have been poorly described at a community-level. Here we use a controlled experimental setting to evaluate short-term stream community responses to salinization, under conditions designed to replicate the duration (72 h) and intensity (up to 5 mS cm-1) of salinity pulses common to Mediterranean rivers subjected to mining pollution during runoff events. There was a significant overall effect, but differences between individual treatments and the control were only significant for the highest salinity treatment. The community response to salinization was characterized by a decline in total invertebrate density, taxon richness and diversity, an increase in invertebrate drift and loss of the most sensitive taxa. The findings indicate that short-term salinity increases have a significant impact on the stream invertebrate community, but concentrations of 5 mS cm-1 are needed to produce a significant ecological response. © 2012 Elsevier Ltd. All rights reserved.

Pascual J.,Polytechnic University of Catalonia | Romera J.,Polytechnic University of Catalonia | Puig V.,Polytechnic University of Catalonia | Puig V.,Iri Institute Of Robotica I Informatica Industrial Csic Upc | And 4 more authors.
Control Engineering Practice | Year: 2013

This paper describes the application of model-based predictive control (MPC) techniques to the supervisory flow management in large-scale drinking water networks including a telemetry/telecontrol system. MPC is used to generate flow control strategies (set-points for the regulatory controllers) from the sources to the consumer areas to meet future demands, optimizing performance indexes associated to operational goals such as economic cost, safety storage volumes in the network and smoothness of the flow control actions. The designed management strategies are applied to a model of a real case study: the drinking water transport network of Barcelona (Spain). © 2013 Elsevier Ltd.

Honey-Roses J.,University of Illinois at Urbana - Champaign | Honey-Roses J.,Catalan Institute for Water Research | Acuna V.,Catalan Institute for Water Research | Bardina M.,Catalan Water Agency ACA | And 9 more authors.
Ecological Economics | Year: 2013

Ecosystem services would be incorporated into decision making more often if researchers were to focus more on the demand for these services rather than the supply. This implies examining the economic, decision making and technological context of the end-user before trying to attribute economic values to well known biological processes. This paper provides an example of how this research approach for ecosystems services could unfold. In the Llobregat River in northeastern Spain, higher stream temperatures require water treatment managers to switch on costly water treatment equipment especially during warm months. This creates an opportunity to align the economic interests of downstream water users with the environmental goals of river managers. A restored riparian forest or an increase in stream flow could reduce the need for this expensive equipment by reducing stream temperatures below critical thresholds. We used the Stream Network Temperature Model (SNTEMP) to test the impact of increasing shading and discharge on stream temperature at the intake of the drinking water treatment plant. The value of the stream temperature ecosystem services provided by existing forests is €79,000 per year for the water treatment facility, while additional riparian forest restoration along the Llobregat River could generate economic savings for water treatment managers in the range of €57,000-€156,000 per year. Stream restoration at higher elevations would yield greater benefits than restoration in the lower reaches. Moderate increases in stream discharge (25%) could generate savings of €40,000 per year. © 2013 Elsevier B.V.

Arguelles M.C.,University of Barcelona | Grantham T.E.,University of Barcelona | Perree I.,University of Barcelona | Rieradevall M.,University of Barcelona | And 3 more authors.
Tecnologia del Agua | Year: 2012

The present paper describes the mesocosms Sostaqua, a group of open-flow channels which recreate the natural river conditions. It is the first facility of this kind built in Spain, and it has the potential to be used for a wide range of interests involving from research groups to enterprises. The aim of this paper is to describe the experimental design of the mesocosms together with some of the results obtained in different experiments carried out within the facility.

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