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Título

Effect of reservoirs on streamflow and river regimes in a heavily regulated river basin of Northeast Spain

Autor Vicente-Serrano, Sergio M.; Zabalza-Martínez, J.; Borràs, G.; López-Moreno, Juan I. ; Pla, E.; Pascual, D.; Savé, R.; Biel, C.; Funes, I.; Martín-Hernández, Natalia; Peña-Gallardo, Marina; Beguería, Santiago ; Tomás-Burguera, Miquel
Palabras clave River regime
Runoff trends
Dams
Water use
Fecha de publicación 2017
EditorElsevier
Citación Vicente-Serrano SM, Zabalza-Martínez J, Borràs G, López-Moreno JI, Pla E, Pascual D, Savé R, Biel C, Funes I, Martín-Hernández N, Peña-Gallardo M, Beguería S, Tomás-Burguera M. Effect of reservoirs on streamflow and river regimes in a heavily regulated river basin of Northeast Spain. Catena 149: 727-741(2017)
ResumenDams modify downstream hydrology because they alter natural river regimes and divert river flows. The Segre Basin is one of the main tributaries of the Ebro River in Northeastern Spain, and has a drainage area of 13,000 km2. In this study, we used data on long-term (1951–2013) river flows and climatic series to analyze the downstream cumulative effect of dams on natural river regimes and the disassociation between changes in climate and runoff in the Segre Basin. The headwaters of this basin are in the Pyrenees Mountains, and water flow has been highly regulated since the second half of the twentieth century due to the construction of numerous dams. We compared long-term monthly averages of upstream and downstream sectors, and assessed the relationship between the climatic and hydrological time series. Our results show that the progressive increase of the impounded ratio index (reservoir capacity) increased the disassociation between climate and runoff. This markedly exacerbated the negative trend in downstream runoff, so this decline that cannot be solely explained by climatic changes. Our results provide evidence that reservoirs can cause a significant decline in downstream runoff and significant alterations of natural river regimes.
Descripción 41 Pags.- 5 Tabls.- 13 Figs. The definitive version is available at: http://www.sciencedirect.com/science/journal/03418162
Versión del editorhttp://dx.doi.org/10.1016/j.catena.2016.03.042
URI http://hdl.handle.net/10261/131907
DOI10.1016/j.catena.2016.03.042
ISSN0341-8162
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