Hydrology under climate and land use - land cover changes
Hydrologie sous changement du climat et des usages
Résumé
Human activity and the water cycle are strongly interconnected. Land use and land cover (LULC) influence water resources and alter hydrological processes, while hydrological changes due to changing climate and LULC affect human societies. We constructed three LULC scenarios based on surveys with local stakeholders and combined these LULC scenarios with two contrasted hourly climate projections for the mid-century, at the scale of a rural Mediterranean 42 km² catchment. We evaluated the hydrological impact of these possible future pathways via a spatially distributed hydrological model. The projected changes of high flow extremes and ground water contributions were determined by the climatic conditions while both climate and LULC significantly impacted low flow extremes and overland flow contribution. All tested future pathways agreed on a dryer summer and more extreme low-flows.
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