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Contribution of channel geometry adjustments to stage variance based on rating-curves in the main stream of the Lancang-Mekong river

文献类型：期刊论文

作者He, Li2; Tang, Qiuhong1,2; Chen, Dong1,2; Gaffney, Paul P. J.2; Sun, Gaohu3
刊名SCIENTIFIC REPORTS
出版日期2025-10-15
卷号15期号:1页码:35988
关键词Channel geometry adjustment Stage variance Rating-curve Hydrological regime Lancang-Mekong river
ISSN号2045-2322
DOI10.1038/s41598-025-19822-w
产权排序1
文献子类Article
英文摘要Extensive dam development and climate change have altered seasonal stage variation patterns, which are critical to residents in the riparian zone along the Lancang-Mekong River. However, the effects of morphological changes and reservoirs on stage variability are not clear due to data-scarce fluvial systems. In this work, discharge and water level data from five hydrological stations (1960-2020) were acquired to assess temporal shifts in rating curves during different disturbance periods. The contribution of channel geometry adjustment to the stage variance of the extreme flow regime under high- and low-flow conditions were empirical analysed by rating-curve method. Analysis revealed that the stage variance along the main channel was modulated by channel geometry adjustment under both high- and low-flow conditions, even though discharge was the dominant factor. Moreover, the degree of modulation resulting from geometric adjustment varied under different flow and reach conditions, which varied in the ranges of -0.57 similar to 0.27 m and - 0.41 similar to 0.39 m under low- and high-flow conditions, respectively. Furthermore, an inverse channel geometry adjustment response was observed for 60% of the high-flow conditions versus 40% of the low-flow conditions. The Luang Prabang-Vientiane reach was transitional in terms of the effects of channel geometry adjustment on stage variation. Our findings quantified how channel geometry adjustment modulated water levels across various extreme regimes, offering insights into the morphological processes of data-scarce river reaches.
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WOS关键词SEDIMENT LOAD ; DISCHARGE ; FLOODPLAIN ; HYDROPOWER ; IMPACTS ; POWER ; DAMS
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:001596281700038
出版者NATURE PORTFOLIO
源URL[http://ir.igsnrr.ac.cn/handle/311030/217782]  
专题陆地水循环及地表过程院重点实验室_外文论文
通讯作者He, Li
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China;
3.Minist Water Resources, Int Econ & Tech Cooperat & Exchange Ctr, Beijing 100053, Peoples R China
推荐引用方式
GB/T 7714		 He, Li,Tang, Qiuhong,Chen, Dong,et al. Contribution of channel geometry adjustments to stage variance based on rating-curves in the main stream of the Lancang-Mekong river[J]. SCIENTIFIC REPORTS,2025,15(1):35988.
APA He, Li,Tang, Qiuhong,Chen, Dong,Gaffney, Paul P. J.,&Sun, Gaohu.(2025).Contribution of channel geometry adjustments to stage variance based on rating-curves in the main stream of the Lancang-Mekong river.SCIENTIFIC REPORTS,15(1),35988.
MLA He, Li,et al."Contribution of channel geometry adjustments to stage variance based on rating-curves in the main stream of the Lancang-Mekong river".SCIENTIFIC REPORTS 15.1(2025):35988.

入库方式： OAI收割

来源：地理科学与资源研究所

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