[1]LI Yang,WANG Jie,TANG Xiongpeng,et al.Characteristics of Runoff Variation and Seasonal Pattern of Lancang-Mekong River in the Context of Environment Change[J].Research of Soil and Water Conservation,2021,28(03):141-148.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 03
Page number:
141-148
Column:
Public date:
2021-04-20
- Title:
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Characteristics of Runoff Variation and Seasonal Pattern of Lancang-Mekong River in the Context of Environment Change
- Author(s):
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LI Yang1, WANG Jie2,3, TANG Xiongpeng2,3, LUO Xian4, TAN Xiaoshan5, WANG Guoqing2,3,6
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(1.AdministrationCenterforWaterResourcesandWaterRightofInnerMongoliaAutonomousRegion,Huhehot010020,China;2.StateKeyLaboratoryofHydrologyWaterResourcesandHydraulicEngineering,NanjingHydraulicResearchInstitute,Nanjing210029,China;3.ResearchCenterforClimateChange,MinistryofWaterResources,Nanjing210029,China;4.InstituteofInternationalRiverandEco-security,YunanUniversity,Kunming650500,China;5.NanjingAutomationInstituteofWaterConservancyandHydrology,Nanjing210012,China;
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- Keywords:
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Lancang-Mekong River basin; runoff; variation trend; seasonal pattern; international trans-boundary river
- CLC:
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TV121.2
- DOI:
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- Abstract:
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The Lancang-Mekong River(abbreviated as LM River)is an important trans-boundary river in Asia. It is of significance to investigate characteristics of runoff variation for supporting sustainable water resources utilization between riparian countries of the LM River Basin. Based on recorded runoff at the eight hydrometric stations on the LM River with time series span of 1960—2012 and segment of sub-regions, the variation trends of annual regional runoff and seasonal patterns of site runoff were analyzed by using Mann-Kendall test and cluster analysis methods. The results show that:(1)the recorded runoff at Jiuzhou and Mukdahan stations presented an increasing trend during the period 1960—2012 while that gauged at the other six hydrometric stations exhibited a decreasing trend with a significant decrease occurring at the Yunjinghong station; half of the eight regional runoff tended to decrease with a significant decrease occurring at the region from Jiuzhou to Yunjinghong while the other four regional runoff had increasing trends with significant runoff increase occurring in two regions of region from Cangdu to Jiuzhou and region from Vientiane to Mukdahan;(2)both site runoff and regional runoff were detectable in abrupt changes with the earliest abrupt change occurring in the 1960s and the latest occurring in 2008; It was also found that the number of abrupt changes in 1990—2012 was more than that in the previous period 1960—1989;(3)environment changes, particularly hydropower development in the upper reaches of the LM River basin exerted a certain impact of seasonal pattern of stream runoff gauged from Yunjinghong to Vientiane station; discharges in flood season of 1990—2012 were commonly lower than those of 1960—1989 while discharges in dry season of the later period were higher than those in the earlier period of 1960—1989, which could effectively reduce flood control pressure.