| Modeling study of residence time and water age in Dahuofang Reservoir in China | |
| Alternative Title | Modeling study of residence time and water age in Dahuofang Reservoir in China |
| Shen YongMing1; Wang JinHua1; Zheng BingHui2; Zhen Hong3; Feng Yu3; Wang ZaiXing4; Yang Xu4 | |
| 2011 | |
| Source Publication | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| ISSN | 1674-7348 |
| Volume | 54Issue:1Pages:127-142 |
| Abstract | 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. |
| Other Abstract | 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 |
| Keyword | 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 |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Science and Technology Major Special Project of China on Water Pollution Control and Management] ; [National Natural Science Foundation of China] |
| CSCD ID | CSCD:4131720 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/148039 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 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 |
| Recommended Citation 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. |
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