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

Abstract

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. 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.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5];  [5]; ORCiD logo [2];  [6]
  1. Changjiang Institute of Survey, Planning, Design and Research, Wuhan China; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing China
  2. Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing China; Joint Center for Global Change Studies, Beijing China
  3. Pacific Northwest National Laboratory, Richland WA USA
  4. Department of Land Resources and Environmental Sciences and Institute on Ecosystems, Montana State University, Bozeman MT USA
  5. State Key Laboratory of Hydro-science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing China
  6. Mekong Institute of Cambodia, Phnom Penh Cambodia
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1430447
Report Number(s):
PNNL-SA-127876
Journal ID: ISSN 0094-8276; KP1703010
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophysical Research Letters; Journal Volume: 44; Journal Issue: 20
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Wei, Lu, Hui, Ruby Leung, L., Li, Hong-Yi, Zhao, Jianshi, Tian, Fuqiang, Yang, Kun, and Sothea, Khem. Dam Construction in Lancang-Mekong River Basin Could Mitigate Future Flood Risk From Warming-Induced Intensified Rainfall: Dam Mitigate Flood Risk in Mekong. United States: N. p., 2017. Web. doi:10.1002/2017GL075037.
Wang, Wei, Lu, Hui, Ruby Leung, L., Li, Hong-Yi, Zhao, Jianshi, Tian, Fuqiang, Yang, Kun, & Sothea, Khem. Dam Construction in Lancang-Mekong River Basin Could Mitigate Future Flood Risk From Warming-Induced Intensified Rainfall: Dam Mitigate Flood Risk in Mekong. United States. doi:10.1002/2017GL075037.
Wang, Wei, Lu, Hui, Ruby Leung, L., Li, Hong-Yi, Zhao, Jianshi, Tian, Fuqiang, Yang, Kun, and Sothea, Khem. Wed . "Dam Construction in Lancang-Mekong River Basin Could Mitigate Future Flood Risk From Warming-Induced Intensified Rainfall: Dam Mitigate Flood Risk in Mekong". United States. doi:10.1002/2017GL075037.
@article{osti_1430447,
title = {Dam Construction in Lancang-Mekong River Basin Could Mitigate Future Flood Risk From Warming-Induced Intensified Rainfall: Dam Mitigate Flood Risk in Mekong},
author = {Wang, Wei and Lu, Hui and Ruby Leung, L. and Li, Hong-Yi and Zhao, Jianshi and Tian, Fuqiang and Yang, Kun and Sothea, Khem},
abstractNote = {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. 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.},
doi = {10.1002/2017GL075037},
journal = {Geophysical Research Letters},
number = 20,
volume = 44,
place = {United States},
year = {Wed Oct 25 00:00:00 EDT 2017},
month = {Wed Oct 25 00:00:00 EDT 2017}
}