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Drought in Lancang-Mekong River Basin and the impact of upstream reservoirs

LIU Hui ，YANG Zechuan ，XU Fengran ，ZHANG Xuejun ，
1
2
1
3
1 1 4
Baiyinbaoligao ，MU Xiangpeng ，HU Hongchang
（1. Department of Hydraulics，China Institute of Water Resources and Hydropower Research，Beijing 100038，China；
2. International Economic & Technical Cooperation and Exchange Center，Ministry of Water Resources，Beijing 100038，China；
3. Research Center on Flood and Drought Disaster Reduction，
China Institute of Water Resources and Hydropower Research，Beijing 100038，China；
4. State Key Laboratory of Hydroscience and Engineering，Tsinghua University，Beijing 100084，hina）

Abstract：Drought is one of the main natural disasters in the Lancang-Mekong River Basin （LMRB），pos⁃
ing huge threats to the agricultural and ecological security. This paper characterized the meteorological and
hydrological drought. Two droughts in 2009/2010 and 2012/2013 were selected to carry out comparative
study. The results show that there is no significant trend of meteorological and hydrological drought in the
whole LMRB，but the trend varies among different sub-regions. The meteorological drought in 2012/2013 is
generally more severe than in 2009/2010. However，there is no hydrological drought in the mainstem of the
Mekong River in the same period. Water released by the Lancang hydropower cascade was 43% more than
its annural average natural inflow，which played a positive role in drought relief of the mainstem of the Me⁃
kong River.
Keywords：hydrology；drought；characteristics；comparison；Lancang-Mekong River；reservoir regulation
（责任编辑：王学凤）

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