Assessing Climate Change Impacts on River Flows in the Tonle Sap Lake Basin, Cambodia (2019)
The Tonle Sap is the most fertile and diverse freshwater ecosystem in Southeast Asia, receiving nurturing water flows from the Mekong and its immediate basin. In addition to rapid development in the Tonle Sap basin, climate change may threaten natural flow patterns that sustain its diversity. The impacts of climate change on river flows in 11 sub-basins contributing to the Tonle Sap Lake were assessed using the Soil and Water Assessment Tool (SWAT) model to quantify the potential magnitude of future hydrological alterations. Projected river flows from three General Circulation Models (GFDL-CM3, GISS-E2-R-CC and IPSL-CM5A-MR) for three time horizons (2030s, 2060s and 2090s) indicate a likely decrease in both the wet and dry season flows. The mean annual projected flow reductions range from 9 to 29%, 10 to 35% and 7 to 41% for the 2030s, 2060s and 2090s projections, respectively. Moreover, a decrease in extreme river flows (Q5 and Q95) was also found, which implies there could be a decline in flood magnitudes and an increase in drought occurrences throughout the basin. The results of this study provide insight for water resources planning and adaptation strategies for the river ecosystems during the dry season, when water flows are projected to decrease.
CitationOeurng C, Cochrane T, Chung S, Kondolf M, Piman T, Arias M Assessing Climate Change Impacts on River Flows in the Tonle Sap Lake Basin, Cambodia. Water. 11(3). 618-618.
This citation is automatically generated and may be unreliable. Use as a guide only.
Keywordsclimate change; river flow; Tonle Sap; SWAT model; Lower Mekong
ANZSRC Fields of Research05 - Environmental Sciences::0501 - Ecological Applications::050101 - Ecological Impacts of Climate Change
31 - Biological sciences::3103 - Ecology::310304 - Freshwater ecology
Rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Showing items related by title, author, creator and subject.
Arias, M.E.; Cochrane, T.A. (University of Canterbury. Civil and Natural Resources Engineering, 2013)• The Tonle Sap is the largest wetland and fishery in the Mekong but it is expected to be affected by hydropower and climate change • Landscape-scale spatial distribution of habitats were found to be largely driven by ...
Assessment of flow changes from hydropower development and operations in Sekong, Sesan and Srepok Rivers of the Mekong Basin Piman, T.; Cochrane, T.A.; Arias, M.E.; Green, A.; Dat, N.D. (University of Canterbury. Civil and Natural Resources Engineering, 2013)The Mekong River supports unique biodiversity and provides food security for over sixty million people in the Indo-Burma region, but potential changes to natural flow patterns from hydropower development are a major risk ...
Modelling the Impact of Large Dams on Flows and Hydropower Production of the Sekong, Sesan, and Srepok Rivers in the Mekong Basin Cochrane, T.A.; Piman, T.; Arias, M.E. (University of Canterbury. Civil and Natural Resources Engineering, 2013)