Streamflow trends of the Pyrenees using observations and multi-model approach (1980–2013)
Ver/
Fecha
2023-04Autor
Clavera Gispert, Roger
Quintana Seguí, Pere
Palazón, Leticia
Zabaleta Lopetegui, Ane
Cenobio Cruz, Omar
Barella Ortiz, Anaïs
Beguería-Portugués, S.
Metadatos
Mostrar el registro completo del ítem
Journal of Hydrology: Regional Studies 46 : (2023) // Article ID 101322
Resumen
Study region: The Pyrenees.
Study focus: The Pyrenees is sensitive to changes in climate (both natural and of anthropic origin)
and changes in land use and cover (LULC). These changes can influence the water resources. The
historical evolution (1980–2013) of the stream flows are studied using observed time series from
non-influenced gauging stations and two models (SASER and SWAT). Their comparison helps to
detect and analyze changes in flow rates and their trends (trends are computed using the Sen’s
slope estimator, the significance of which was evaluated using the Mann-Kendall test). Further-
more, it also allows to explore the question of attribution (these models do not simulate LULC
change).
New hydrological insights for the region: A complex and diverse domain such as the Pyrenees gives
large differences between modelled trends revealing a large uncertainty that has been observed
thanks to the use of two models. For the study period, mostly there are no significant trends.
When trends are present in the observations and are also simulated, they are attributed to the
effects of climate (natural variability and human induced climate change). When the significant
trends observed are not simulated by the models, they are mainly attributed to changes in LULC.
In general, models have difficulties detecting observed trends, leading to their attribution to
changes in LULCs rather than climate, but there are some notable exceptions.