题名 | Base flow recession from unsaturated-saturated porous media considering lateral unsaturated discharge and aquifer compressibility |
作者 | |
通讯作者 | Liang, Xiuyu; Zhan, Hongbin |
发表日期 | 2017-09
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DOI | |
发表期刊 | |
ISSN | 0043-1397
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EISSN | 1944-7973
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卷号 | 53期号:9页码:7832-7852 |
摘要 | Unsaturated flow is an important process in base flow recessions and its effect is rarely investigated. A mathematical model for a coupled unsaturated-saturated flow in a horizontally unconfined aquifer with time-dependent infiltrations is presented. The effects of the lateral discharge of the unsaturated zone and aquifer compressibility are specifically taken into consideration. Semianalytical solutions for hydraulic heads and discharges are derived using Laplace transform and Cosine transform. The solutions are compared with solutions of the linearized Boussinesq equation (LB solution) and the linearized Laplace equation (LL solution), respectively. A larger dimensionless constitutive exponent kappa(D) (a smaller retention capacity) of the unsaturated zone leads to a smaller discharge during the infiltration period and a larger discharge after the infiltration. The lateral discharge of the unsaturated zone is significant when kappa D <= 1, and becomes negligible when kappa(D) >= 100. The compressibility of the aquifer has a nonnegligible impact on the discharge at early times. For late times, the power index b of the recession curve -dQ/dt similar to aQ(b), is 1 and independent of kappa(D), where Q is the base flow and a is a constant lumped aquifer parameter. For early times, b is approximately equal to 3 but it approaches infinity when t -> 0. The present solution is applied to synthetic and field cases. The present solution matched the synthetic data better than both the LL and LB solutions, with a minimum relative error of 16% for estimate of hydraulic conductivity. The present solution was applied to the observed streamflow discharge in Iowa, and the estimated values of the aquifer parameters were reasonable. |
关键词 | |
相关链接 | [来源记录] |
收录类别 | |
语种 | 英语
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学校署名 | 其他
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资助项目 | Department of Science and Technology of Jiangsu Province[BE2015708]
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WOS研究方向 | Environmental Sciences & Ecology
; Marine & Freshwater Biology
; Water Resources
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WOS类目 | Environmental Sciences
; Limnology
; Water Resources
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WOS记录号 | WOS:000413484200019
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出版者 | |
EI入藏号 | 20174304309398
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EI主题词 | Aerodynamics
; Aquifers
; Compressibility
; Cosine Transforms
; Estimation
; Laplace Transforms
; Linearization
; Porous Materials
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EI分类号 | Groundwater:444.2
; Aerodynamics, General:651.1
; Mathematics:921
; Mathematical Transformations:921.3
; Materials Science:951
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ESI学科分类 | ENVIRONMENT/ECOLOGY
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来源库 | Web of Science
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引用统计 |
被引频次[WOS]:21
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成果类型 | 期刊论文 |
条目标识符 | http://sustech.caswiz.com/handle/2SGJ60CL/28675 |
专题 | 工学院_环境科学与工程学院 |
作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Jiangsu, Peoples R China 2.Texas A&M Univ, Dept Geol & Geophys, College Stn, TX USA 3.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen, Guangdong, Peoples R China 4.Univ Iowa, Iowa Geol Survey, Iowa City, IA USA |
推荐引用方式 GB/T 7714 |
Liang, Xiuyu,Zhan, Hongbin,Zhang, You-Kuan,et al. Base flow recession from unsaturated-saturated porous media considering lateral unsaturated discharge and aquifer compressibility[J]. WATER RESOURCES RESEARCH,2017,53(9):7832-7852.
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APA |
Liang, Xiuyu,Zhan, Hongbin,Zhang, You-Kuan,&Schilling, Keith.(2017).Base flow recession from unsaturated-saturated porous media considering lateral unsaturated discharge and aquifer compressibility.WATER RESOURCES RESEARCH,53(9),7832-7852.
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MLA |
Liang, Xiuyu,et al."Base flow recession from unsaturated-saturated porous media considering lateral unsaturated discharge and aquifer compressibility".WATER RESOURCES RESEARCH 53.9(2017):7832-7852.
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条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | 操作 | |
2017WR020938.pdf(6099KB) | -- | -- | 限制开放 | -- |
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