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Projections of Extreme Precipitation Events under Climate Change Scenarios in Mahaweli River Basin of Sri Lanka


Affiliations
1 Department of Civil and Infrastructure Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathum Thani 12120, Thailand
2 Department of Food, Agriculture and Bioresources, School of Environment Resources and Development, Asian Institute of Technology, Pathum Thani 12120, Thailand
 

The future changes in rainfall pattern in the Mahaweli River Basin of Sri Lanka using three general circulation models under two representative concentration pathways were assessed. The projections showed that consecutive dry days will decrease, consecutive wet days and annual total precipitation in wet days will increase, the monthly maximum consecutive five-day precipitation will generally decrease, and annual rainfall will increase except for the first inter-monsoon. The projections of the heavy rainfall varied according to the time periods and climate zones. The present results can help policy makers to optimize the use of water resources considering future climate change.

Keywords

Bias Correction, Climate Change, Extreme Precipitation, GCMs, Rainfall, RCPs.
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  • Projections of Extreme Precipitation Events under Climate Change Scenarios in Mahaweli River Basin of Sri Lanka

Abstract Views: 398  |  PDF Views: 161

Authors

Naditha Imbulana
Department of Civil and Infrastructure Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathum Thani 12120, Thailand
Shakthi Gunawardana
Department of Civil and Infrastructure Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathum Thani 12120, Thailand
Sangam Shrestha
Department of Civil and Infrastructure Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathum Thani 12120, Thailand
Avishek Datta
Department of Food, Agriculture and Bioresources, School of Environment Resources and Development, Asian Institute of Technology, Pathum Thani 12120, Thailand

Abstract


The future changes in rainfall pattern in the Mahaweli River Basin of Sri Lanka using three general circulation models under two representative concentration pathways were assessed. The projections showed that consecutive dry days will decrease, consecutive wet days and annual total precipitation in wet days will increase, the monthly maximum consecutive five-day precipitation will generally decrease, and annual rainfall will increase except for the first inter-monsoon. The projections of the heavy rainfall varied according to the time periods and climate zones. The present results can help policy makers to optimize the use of water resources considering future climate change.

Keywords


Bias Correction, Climate Change, Extreme Precipitation, GCMs, Rainfall, RCPs.

References





DOI: https://doi.org/10.18520/cs%2Fv114%2Fi07%2F1495-1509