Modeling study of residence time and water age in Dahuofang Reservoir in China

IMR OpenIR

	Modeling study of residence time and water age in Dahuofang Reservoir in China
其他题名	Modeling study of residence time and water age in Dahuofang Reservoir in China
	Shen YongMing 1; Wang JinHua 1; Zheng BingHui 2; Zhen Hong 3; Feng Yu 3; Wang ZaiXing 4; Yang Xu 4
	2011
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN	1674-7348
卷号	54 期号:1 页码:127-142
摘要	Understanding the dynamics of water renewal in a reservoir is essential when the transport and fate of dissolved substances are evaluated. A three-dimensional hydrodynamic model was implemented to compute average residence time and water age in Dahuofang Reservoir in China. The model was verified for a one-year time period in 2006. A simulation reproduced intra-annual variation of mixing represented by the fall/winter mixing and the spring/summer stratification. The simulated variation of vertical thermal structures also matched observation. The spatially varying average residence times and age distribution were investigated through a series of numerical experiments using a passively dissolved and conservative tracer as a surrogate. Residence time estimations yield a broad range of values depending on the position. The average residence time for a tracer placed at the head of the reservoir under high-, mean-, and low flow conditions was found to be about 125, 236 and 521 days, respectively. The age simulation reveals that the age distribution is a function of the freshwater discharge. In the vertical direction, the age of the surface layers is larger than that of the bottom layers and the age difference between the surface and bottom layers decreases further downstream. The density-induced circulation plays an important role in the circulation in the reservoir, and can generate vertical age distribution in the reservoir. These findings provide useful information for understanding the transport process in Dahuofang Reservoir that can be used to assist the water quality management of the reservoir.
其他摘要	Understanding the dynamics of water renewal in a reservoir is essential when the transport and fate of dissolved substances are evaluated. A three-dimensional hydrodynamic model was implemented to compute average residence time and water age in Dahuofang Reservoir in China. The model was verified for a one-year time period in 2006. A simulation reproduced intra-annual variation of mixing represented by the fall/winter mixing and the spring/summer stratification. The simulated variation of vertical thermal structures also matched observation. The spatially varying average residence times and age distribution were investigated through a series of numerical experiments using a passively dissolved and conservative tracer as a surrogate. Residence time estimations yield a broad range of values depending on the position. The average residence time for a tracer placed at the head of the reservoir under high-, mean-, and low flow conditions was found to be about 125, 236 and 521 days, respectively. The age simulation reveals that the age distribution is a function of the freshwater discharge. In the vertical direction, the age of the surface layers is larger than that of the bottom layers and the age difference between the surface and bottom layers decreases further downstream. The density-induced circulation plays an important role in the circulation in the reservoir, and can generate vertical age distribution in the reservoir. These findings provide useful information for understanding the transport process in Dahuofang Reservoir that can be used to assist the water quality management of the reservoir
关键词	DANSHUEI RIVER ESTUARY RESIDUAL CIRCULATION FINITE-VOLUME OCEAN MODEL OIL-SPILLS TRANSPORT BAY EQUATIONS TAIWAN SCALES Dahuofang reservoir reservoir three-dimensional model residence time age
收录类别	CSCD
语种	英语
资助项目	[National Science and Technology Major Special Project of China on Water Pollution Control and Management] ; [National Natural Science Foundation of China]
CSCD记录号	CSCD:4131720
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/148036
专题	中国科学院金属研究所
作者单位	1.大连大学 2.Chinese Res Institute Environm Sci, Beijing 100012, Peoples R China 3.中国科学院金属研究所 4.Dahuofang Reservoir Adm Bur, Fushun 113007, Peoples R China
推荐引用方式 GB/T 7714	Shen YongMing,Wang JinHua,Zheng BingHui,et al. Modeling study of residence time and water age in Dahuofang Reservoir in China[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2011,54(1):127-142.
APA	Shen YongMing.,Wang JinHua.,Zheng BingHui.,Zhen Hong.,Feng Yu.,...&Yang Xu.(2011).Modeling study of residence time and water age in Dahuofang Reservoir in China.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,54(1),127-142.
MLA	Shen YongMing,et al."Modeling study of residence time and water age in Dahuofang Reservoir in China".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 54.1(2011):127-142.