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- Title
Why increased extreme precipitation under climate change negatively affects water security.
- Authors
Hunink, Johannes E.; Eekhout, Joris P. C.; Wilco Terink; de Vente, Joris
- Abstract
An increase of extreme precipitation is projected for many areas worldwide in the coming decades. To assess the impact of increased precipitation intensity on water security, we applied a regional scale hydrological and soil erosion model, forced with Regional Climate Model projections. We specifically considered the impact of climate change on the distribution of water between soil (green water) and surface water (blue water) compartments. We show that an increase in precipitation intensity leads to a redistribution of water within the catchment, where water storage in soil decreases and reservoir inflow increases. This affects plant water stress and the potential of rainfed versus irrigated agriculture, and increases dependency on reservoir storage, that is increasingly threatened by an increase of soil erosion. This study demonstrates the crucial importance of accounting for the fact that increased precipitation intensity leads to water redistribution between green and blue water, increased soil erosion, and reduced water security.
- Subjects
METEOROLOGICAL precipitation; CLIMATE change; WATER security; SOIL erosion; HYDROLOGIC models
- Publication
Hydrology & Earth System Sciences Discussions, 2018, p1
- ISSN
1812-2108
- Publication type
Article
- DOI
10.5194/hess-2018-161