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Title: Dam Construction in Lancang-Mekong River Basin Could Mitigate Future Flood Risk From Warming-Induced Intensified Rainfall

Journal Article · · Geophysical Research Letters

Water resources management, in particular flood control, in the Mekong River Basin (MRB) faces two key challenges in the 21st century: climate change and dam construction. Herein, a large scale distributed Geomorphology-Based Hydrological Model coupled with a simple reservoir regulation model (GBHM-MK-SOP) is used to investigate the relative effects of climate change and dam construction on the flood characteristics in the MRB. Results suggest an increase in both flood magnitude and frequency under climate change, which is more severe in the upstream basin and increases over time. However, dam construction and stream regulation reduce flood risk consistently throughout this century, with more obvious effects in the upstream basin where larger reservoirs will be located. The flood mitigation effect of dam regulation dominates over the flood intensification effect of climate change before 2060, but the latter emerges more prominently after 2060 and dominates the flood risk especially in the lower basin.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
National Key Research and Development Program of China; National Key Basic Research Program of China; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830; 2016YFA0601603; 2015CB953703; 91537210; 41371328
OSTI ID:
1430447
Report Number(s):
PNNL-SA-127876; KP1703010
Journal Information:
Geophysical Research Letters, Vol. 44, Issue 20; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 74 works
Citation information provided by
Web of Science

References (35)

Global flood risk under climate change journal June 2013
Effect of precipitation sampling error on simulated hydrological fluxes and states: Anticipating the Global Precipitation Measurement satellites journal January 2004
Quantifying changes in flooding and habitats in the Tonle Sap Lake (Cambodia) caused by water infrastructure development and climate change in the Mekong Basin journal December 2012
Mekong River flow and hydrological extremes under climate change journal January 2016
Mekong at the Crossroads: Next Steps for Impact Assessment of Large Dams journal April 2012
Uncertainty in climate change projections of discharge for the Mekong River Basin journal January 2011
Ecosystem Management of the Tonle Sap Lake: An Integrated Modelling Approach journal September 2006
Changes in precipitation with climate change journal March 2011
Assessment of the Impact of Reservoirs in the Upper Mekong River Using Satellite Radar Altimetry and Remote Sensing Imageries journal April 2016
A trend-preserving bias correction – the ISI-MIP approach journal January 2013
Global Water Resources: Vulnerability from Climate Change and Population Growth journal July 2000
Snow cover and precipitation impacts on dry season streamflow in the Lower Mekong Basin: MEKONG STREAMFLOW AND CLIMATE CHANGE journal August 2012
Future changes in Mekong River hydrology: impact of climate change and reservoir operation on discharge journal January 2012
Downstream Hydrological Impacts of Hydropower Development in the Upper Mekong Basin journal June 2012
Mekong Hydropower Development journal April 2011
Flood Pulse Alterations and Productivity of the Tonle Sap Ecosystem: A Model for Impact Assessment journal May 2008
Water Resource Models in the Mekong Basin: A Review journal October 2011
Modelling climate change impacts on the flood pulse in the Lower Mekong floodplains journal March 2010
The changing nature of flooding across the central United States journal February 2015
Increased flood risk linked to global warming journal February 2011
The next generation of scenarios for climate change research and assessment journal February 2010
Linking flood frequency to long-term water balance: Incorporating effects of seasonality: FLOOD FREQUENCY AND HYDROLOGIC SEASONALITY journal June 2005
Modelling Hydrologic Processes in the Mekong River Basin Using a Distributed Model Driven by Satellite Precipitation and Rain Gauge Observations journal March 2016
Hydrological trend analysis in the Yellow River basin using a distributed hydrological model: HYDROLOGICAL TRENDS IN THE YELLOW RIVER BASIN journal February 2009
Water Policy Analysis for the Mekong River Basin journal March 2004
Nonlinear Filtering Effects of Reservoirs on Flood Frequency Curves at the Regional Scale: RESERVOIRS FILTER FLOOD FREQUENCY CURVES journal October 2017
Assessment of uncertainty in river flow projections for the Mekong River using multiple GCMs and hydrological models journal April 2013
Instream Flow Regimens for Fish, Wildlife, Recreation and Related Environmental Resources journal July 1976
Precipitation Extremes Under Climate Change journal April 2015
Robust Responses of the Hydrological Cycle to Global Warming journal November 2006
Observed river discharge changes due to hydropower operations in the Upper Mekong Basin journal February 2017
Understanding flood regime changes in Europe: a state-of-the-art assessment journal January 2014
Evidence for intensification of the global water cycle: Review and synthesis journal March 2006
Flood trends and variability in the Mekong river journal January 2010
A hillslope-based hydrological model using catchment area and width functions journal February 2002

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