气候变化领域集成服务门户(CCPortal): Modeling Daily Floods in the Lancang-Mekong River Basin Using an Improved Hydrological-Hydrodynamic Model

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DOI	10.1029/2021WR029734
	Modeling Daily Floods in the Lancang-Mekong River Basin Using an Improved Hydrological-Hydrodynamic Model
	Wang, Jie; Yun, Xiaobo; Pokhrel, Yadu; Yamazaki, Dai; Zhao, Qiudong; Chen, Aifang; Tang, Qiuhong
通讯作者	Tang, QH (通讯作者)，Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China. ; Tang, QH (通讯作者)，Univ Chinese Acad Sci, Beijing, Peoples R China.
发表日期	2021
ISSN	0043-1397
EISSN	1944-7973
卷号	57 期号:8
英文摘要	Daily floods including event, characteristic, extreme and inundation in the Lancang-Mekong River Basin (LMRB), crucial for flood projection and forecasting, have not been adequately modeled. An improved hydrological-hydrodynamic model (VIC and CaMa-Flood) considering regional parameterization was developed to simulate the flood dynamics over the basin from 1967 to 2015. The flood elements were extracted from daily time series and evaluated at both local and regional scales using the data collected from in-situ observations and remote sensing. The results show that the daily discharge and water level are both well simulated at selected stations with relative error (RE) less than 10% and Nash-Sutcliffe efficiency coefficient (NSE) over 0.90. Half of the flood events have NSE exceeding 0.76. The peak time and flood volume are well reproduced while both peak discharge and water level are slightly underestimated. The results tend to worsen when the characteristics of flood events are extended to annual extremes. These extremes are generally underestimated with NSE less than 0.5 but RE is within 20%. The simulated rainy season inundation area generally agrees with observations from remote sensing, with about 86.8% inundation occurrence frequency captured within the model capacity. Ignoring the regional parameterization and reservoir regulation can both deteriorate flood simulation performance at the local scale, resulting in lower NSE. Specifically, systematically higher water levels and up to 27% overestimation of peak discharge are found when ignoring regional parameterization, while ignoring reservoir regulation would cause up to 23% overestimation for flood extremes. It is expected that these findings would contribute to the regional flood forecasting and flood management.
关键词	GRIDDED PRECIPITATION DATASET CLIMATE-CHANGE IMPACTS LAND-SURFACE DENSE NETWORK SATELLITE WATER FLUXES
英文关键词	daily floods; hydrological-hydrodynamic model; Lancang-Mekong river basin; regional parameterization; reservoir regulation
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS记录号	WOS:000688205400049
来源期刊	WATER RESOURCES RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254864
作者单位	[Wang, Jie; Yun, Xiaobo; Tang, Qiuhong] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China; [Wang, Jie; Yun, Xiaobo; Tang, Qiuhong] Univ Chinese Acad Sci, Beijing, Peoples R China; [Pokhrel, Yadu] Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA; [Yamazaki, Dai] Univ Tokyo, Inst Ind Sci, Global Hydrol Predict Ctr, Komaba, Japan; [Zhao, Qiudong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou, Peoples R China; [Zhao, Qiudong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China; [Chen, Aifang] Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jie,Yun, Xiaobo,Pokhrel, Yadu,et al. Modeling Daily Floods in the Lancang-Mekong River Basin Using an Improved Hydrological-Hydrodynamic Model[J]. 中国科学院西北生态环境资源研究院,2021,57(8).
APA	Wang, Jie.,Yun, Xiaobo.,Pokhrel, Yadu.,Yamazaki, Dai.,Zhao, Qiudong.,...&Tang, Qiuhong.(2021).Modeling Daily Floods in the Lancang-Mekong River Basin Using an Improved Hydrological-Hydrodynamic Model.WATER RESOURCES RESEARCH,57(8).
MLA	Wang, Jie,et al."Modeling Daily Floods in the Lancang-Mekong River Basin Using an Improved Hydrological-Hydrodynamic Model".WATER RESOURCES RESEARCH 57.8(2021).