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Climate change and groundwater pumping impacts on catchment dynamics in Spain

Climate change and groundwater pumping impacts on catchment dynamics in Spain
17 Dec 2015

The combined effects of projected climate change and groundwater pumping has been assessed for a catchment in the Upper Guadiana basin (central Spain) under an upper-end scenario of climate change (the so-called RCP 8.5 scenario). The results (based on 4 different climate models) suggest that the availability of water in the catchment may be significantly lower in the future throughout the year, but most notably during a 3-month longer, extended hotter and drier summer season. For the period 2060 – 2099, compared with 1960 – 1999, the reduction of soil moisture and actual evapotranspiration may be up to 20%, annual groundwater recharge may be reduced by 50%, and annually averaged catchment runoff may be reduced by 60%. 

 

Source: Sapriza-Azuri et al., 2015. Journal of Hydrology 529: 1701–1712. 

Photo: Fran Cabrera (www.Flickr.com)

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