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Assessment of climate change impacts on hydrology and water quality of large semi-arid reservoirs in Brazil.
- Source :
- Hydrological Sciences Journal/Journal des Sciences Hydrologiques; Jul2021, Vol. 66 Issue 8, p1321-1336, 16p
- Publication Year :
- 2021
-
Abstract
- This paper investigates climate change impacts on the hydrology and water quality of Brazilian semi-arid reservoirs. An integrated approach coupling climate, hydrological and water quality models was proposed. Five general circulation models (GCMs) and two future scenarios (SSP2-4.5 and SSP5-8.5) were used for the projections. The simulations showed that uncertainty in climate forecast significantly impacted hydrological and water quality outputs. Some scenarios revealed a strong decrease in streamflow and storage volume. On the other hand, 40% of multi-GCM projections indicated reservoir eutrophication. The impacts on hydrology and water quality under SSP5-8.5 were more significant than those under SSP2-4.5. The results also indicated that drought events may be prolonged under climate change, principally at the end of the 21st century for SSP5-8.5, and may significantly increase the total phosphorus concentration. This suggests that tropical semi-arid reservoirs could be more vulnerable to eutrophication in scenarios of climate change than those in other regions. [ABSTRACT FROM AUTHOR]
- Subjects :
- WATER quality
CLIMATE change
HYDROLOGY
GENERAL circulation model
DROUGHTS
RESERVOIRS
Subjects
Details
- Language :
- English
- ISSN :
- 02626667
- Volume :
- 66
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Hydrological Sciences Journal/Journal des Sciences Hydrologiques
- Publication Type :
- Academic Journal
- Accession number :
- 151679596
- Full Text :
- https://doi.org/10.1080/02626667.2021.1933491