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Article

Unravelling Climate and Anthropogenic Forcings on the Evolution of Surface Water Resources in Southern France

1
Centre de Formation et de Recherche sur les Environnements Méditerranéens, Université de Perpignan Via Domitia, CNRS, UMR 5110, 52 Avenue Paul Alduy, F-66860 Perpignan CEDEX, France
2
Acteurs, Ressources, Territoires dans le Développement, Université de Perpignan Via Domitia, UMR 5281, 52 Avenue Paul Alduy, F-66860 Perpignan CEDEX, France
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3581; https://doi.org/10.3390/w12123581
Received: 20 November 2020 / Revised: 10 December 2020 / Accepted: 16 December 2020 / Published: 20 December 2020
In the Mediterranean, climate change and human pressures are expected to significantly impact the availability of surface water resources. In order to quantify these impacts during the last 60 years (1959–2018), we examined the hydro-climatic and land use change evolution in six coastal river basins of the Gulf of Lion in southern France. By combining observed water discharge, gridded climate, mapped land use and agricultural censuses data, we propose a statistical regression model which successfully reproduces the variability of annual water discharge in all basins. Our results clearly demonstrate that, despite important anthropogenic water withdrawals for irrigation, climate change is the major driver for the detected reduction of water discharge. The model can explain 78–88% of the variability of annual water discharge in the study catchments. It requires only two climatic indices that are solely computed from monthly temperature (T) and precipitation (P) data, thus allowing the estimation of the respective contributions of both parameters in the detected changes. According to our results, the study region experienced on average a warming trend of 1.6 °C during the last 60 years which alone was responsible for a reduction of almost 25% of surface water resources. View Full-Text
Keywords: surface water resources; climate change; anthropogenic pressure; statistical modeling surface water resources; climate change; anthropogenic pressure; statistical modeling
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MDPI and ACS Style

Labrousse, C.; Ludwig, W.; Pinel, S.; Sadaoui, M.; Lacquement, G. Unravelling Climate and Anthropogenic Forcings on the Evolution of Surface Water Resources in Southern France. Water 2020, 12, 3581. https://doi.org/10.3390/w12123581

AMA Style

Labrousse C, Ludwig W, Pinel S, Sadaoui M, Lacquement G. Unravelling Climate and Anthropogenic Forcings on the Evolution of Surface Water Resources in Southern France. Water. 2020; 12(12):3581. https://doi.org/10.3390/w12123581

Chicago/Turabian Style

Labrousse, Camille; Ludwig, Wolfgang; Pinel, Sébastien; Sadaoui, Mahrez; Lacquement, Guillaume. 2020. "Unravelling Climate and Anthropogenic Forcings on the Evolution of Surface Water Resources in Southern France" Water 12, no. 12: 3581. https://doi.org/10.3390/w12123581

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