2024-03-28T18:08:58Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/469412020-01-28T16:04:46Zcom_10261_65com_10261_8col_10261_318
00925njm 22002777a 4500
dc
Lorenzo-Lacruz, Jorge
author
Vicente Serrano, Sergio M.
author
López-Moreno, Juan I.
author
Morán-Tejeda, Enrique
author
Zabalza, Javier
author
2012-01-11
This paper analyzes streamflow trends in 187 sub-basins in the Iberian Peninsula for the period 1945–
2005. A database of monthly river discharges for the entire Iberian Peninsula including natural and regulated
river regimes enabled assessment of the magnitude and spatial patterns and mechanisms of the
hydrological trends. Annual and seasonal trend analyses were conducted. The results showed a marked
decrease in annual, winter, and spring streamflows in most of the Iberian sub-basins, especially those in
the south. In addition, changes in the seasonality of river regimes have occurred, most of them as consequence
of dam regulation and water management strategies. We showed how river regulation by dams
does not affect the sign of the trends, but its magnitude, by decreasing the releases during winter to meet
the demand of water in summer creating important seasonal differences. The decrease of streamflows
during the second half of the Twentieth Century in the Iberian Peninsula may accelerate in coming decades,
as future climate projections show a generalized decrease in precipitation and more evapotranspiration
induced by higher temperatures.
Journal of Hydrology 414-415: 463-475 (2012)
0022-1694
http://hdl.handle.net/10261/46941
10.1016/j.jhydrol.2011.11.023
River discharges
Kendall tau
Water management strategies
Regulation types
Riverflow trends
Iberian Peninsula
Recent trends in Iberian streamflows (1945–2005)