Assessing the impacts of climate and land use and land cover change on the freshwater availability in the Brahmaputra River basin

Journal of Hydrology
By:  and 

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Abstract

Study Region: Brahmaputra River basin in South Asia.

 

Study Focus: The Soil and Water Assessment Tool was used to evaluate sensitivities and patterns in freshwater availability due to projected climate and land use changes in the Brahmaputra basin. The daily observed discharge at Bahadurabad station in Bangladesh was used to calibrate and validate the model and analyze uncertainties with a sequential uncertainty fitting algorithm. The sensitivities and impacts of projected climate and land use changes on basin hydrological components were simulated for the A1B and A2 scenarios and analyzed relative to a baseline scenario of 1988–2004.

 

New hydrological insights for the region: Basin average annual ET was found to be sensitive to changes in CO2 concentration and temperature, while total water yield, streamflow, and groundwater recharge were sensitive to changes in precipitation. The basin hydrological components were predicted to increase with seasonal variability in response to climate and land use change scenarios. Strong increasing trends were predicted for total water yield, streamflow, and groundwater recharge, indicating exacerbation of flooding potential during August–October, but strong decreasing trends were predicted, indicating exacerbation of drought potential during May–July of the 21st century. The model has potential to facilitate strategic decision making through scenario generation integrating climate change adaptation and hazard mitigation policies to ensure optimized allocation of water resources under a variable and changing climate.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Assessing the impacts of climate and land use and land cover change on the freshwater availability in the Brahmaputra River basin
Series title Journal of Hydrology
Subseries Regional Studies
DOI 10.1016/j.ejrh.2014.09.003
Volume 3
Year Published 2015
Language English
Publisher Elsevier
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 27 p.
First page 285
Last page 311
Country Bangladesh
Other Geospatial Brahmaputra River basin
Online Only (Y/N) N
Additional Online Files (Y/N) N
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