Research Article
Hydroclimate Analysis Under 1.5 and 2 ℃ Global Warming in the Faleme River Basin
@INPROCEEDINGS{10.1007/978-3-030-51051-0_9, author={Mamadou Lamine Mbaye and Khadidiatou Sy and Bakary Faty and Saidou Moustapha Sall}, title={Hydroclimate Analysis Under 1.5 and 2 ℃ Global Warming in the Faleme River Basin}, proceedings={Innovations and Interdisciplinary Solutions for Underserved Areas. 4th EAI International Conference, InterSol 2020, Nairobi, Kenya, March 8-9, 2020, Proceedings}, proceedings_a={INTERSOL}, year={2020}, month={8}, keywords={Hydroclimate Faleme basin Impacts Global warming Climate change}, doi={10.1007/978-3-030-51051-0_9} }- Mamadou Lamine Mbaye
Khadidiatou Sy
Bakary Faty
Saidou Moustapha Sall
Year: 2020
Hydroclimate Analysis Under 1.5 and 2 ℃ Global Warming in the Faleme River Basin
INTERSOL
Springer
DOI: 10.1007/978-3-030-51051-0_9
Abstract
In this study, we analyze the hydroclimate of the Faleme basin which is a major tributary in the Senegal River Basin. This basin has faced hydrological droughts that have negatively affected rainfed agriculture, the economic development and have enhanced poverty. The main objective of this work is to investigate the variability and the changes of the basin hydroclimate during the past and the future under 1.5 and 2 ℃ global warming. Extreme precipitations analysis at Kidira (outlet of the basin) exhibit two noticeable periods 1950–1980 and 1981–2010; in the first period wet day’s frequency and rainfall intensity decrease considerably. In the second period, the rainfall intensity, the consecutive dry days decrease while consecutive wet days, wet day frequency increase. Over the whole basin from 1901 to 2013, a general annual deficit is noticed with the simplified water balance, and the standardized precipitation from 1970 to 2010. As for the future changes over the basin by analyzing three regional climate models (RCA4, RACMO22, CCLM) simulations, rainfall is likely to increase under both warming conditions. Potential evapotranspiration from Penman is projected to increase with the highest magnitudes under 2 ℃. Moreover, hydrological simulation with the GR4J model, project slight increase of river discharge in the coming decades. However, the simplified water balance shows drier conditions under both warming scenarios. Therefore, water saving technologies, crop resistant to higher evapotranspiration, and integrated water resources management should be developed and promoted in order to reduce the adverse effects of climate change.
