Vulnerabilidad hídrica del Golfo de Bizkaiade las tendencias del pasado reciente a las del futuro

  1. A. Zabaleta 1
  2. M. Meaurio 1
  3. T. Morales 2
  4. L. Damas 1
  5. I. Antigüedad 1
  1. 1 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  2. 2 Grupo de Procesos Hidro-Ambientales, Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco
Journal:
Geogaceta

ISSN: 0213-683X

Year of publication: 2019

Issue Title: Comunicaciones presentadas en la LXVI Sesión Científica / Leioa (Bilbao), 24 de mayo de 2019

Issue: 66

Pages: 55-58

Type: Article

More publications in: Geogaceta

Abstract

In order to adapt to the effects of climate change on water systems, it is necessary to know the hydrological dynamics of the territory, so we ask ourselves two questions: where do we come from?, where are we going? In order to answer the first question, we have considered the historical discharge series from 117 gauging stations in the Gulf of Biscay. The results indicate that in the last 60 years there has been an evident downward trend in average discharge and an increase in the duration and severity of the low flow period during all seasons of the year. This reflects a notable spatial-temporal homogeneity in the evolution of flows. However, in the last 20 years, while Autumn and Summer maintain a downward trend for average discharge, during Winter and Spring they increased. This reflects a period of changes in the hydrological regime of this region. In order to respond to the latter question, future hydrological regimes have been simulated in two sub-basins. The results indicate that average discharge will decrease progressively until 2100 and that the duration and severity of low flow periods will increase. Autumn will be the most affected season (-18-33%) and Winter the least (-4-14%).