气候变化领域集成服务门户(CCPortal): Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China

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DOI	10.1007/s11069-021-04617-9
	Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China
	Feng Z.; Li Z.; Shi P.; Li P.; Wang T.; Duan J.
发表日期	2021
ISSN	0921030X
起始页码	953
结束页码	969
卷号	107 期号:1
英文摘要	The sedimentation by check dam in the channel affects hydrological process. In this study, the effects of the sedimentation on the dynamic process of runoff and erosion power were investigated by dynamic coupling models (MIKE SHE model and MIKE 11 model). The study area was located in Wangmaogou watershed in the Loess Plateau of China. Four scenarios including no check dam and check dam with siltation depths of 0, 4 and 8 m were designed to study the reduction effectiveness of check dam on the hydrodynamic processes. The research showed that the silt dam not only reduced the total volume flow rate of floods but also increased the flood duration and delayed the occurrence of flood peaks. The siltation depths of the dam influenced the flow velocity and runoff shear stress. With deposition, the channel was longer in 8 m siltation compared with 0 and 4 m siltation. The shear force and unit runoff power were remarkably reduced in the scenario of 8 m siltation, followed by 4 m, and lastly by 0 m. The dam system can still vastly reduce the flow velocity along the channel in the full state and decrease the maximum flow velocity along the channel by more than 50%. The decrease in flow velocity was the main reason for the decrease in the sediment-carrying capacity of the runoff, which directly reduced the runoff erosion intensity. This study provides the scientific basis for understanding the regulation of check dam and sedimentation on hydrological process. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	Check dam Dynamic model Hydrodynamics Loess plateau Runoff erosion power Sedimentation
英文关键词	channel hydraulics; dam; erosion; flow velocity; hydrodynamics; hydrological modeling; runoff; sedimentation; China; Loess Plateau
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206222
作者单位	State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology, NO.5 South Jinhua Road, Xi’ an, Shaanxi 710048, China; Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi’an, 710048, China; Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 450003, China
推荐引用方式 GB/T 7714	Feng Z.,Li Z.,Shi P.,et al. Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China[J],2021,107(1).
APA	Feng Z.,Li Z.,Shi P.,Li P.,Wang T.,&Duan J..(2021).Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China.Natural Hazards,107(1).
MLA	Feng Z.,et al."Impact of sedimentation by check dam on the hydrodynamics in the channel on the Loess Plateau of China".Natural Hazards 107.1(2021).