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DOI: 10.1371/journal.pone.0173236
Title:
High-order scheme for the source-sink term in a one-dimensional water temperature model
Author: Zheng Jing; Ling Kang
Source Publication: PLOS ONE
ISSN: 1932-6203
Indexed By: SCI-E
Publishing Year: 2017
Date Published: 2017-3-6
Volume: 12, Issue:3
Language: 英语
Keyword: Solar radiation ; Lakes ; Surface water ; Simulation and modeling ; Evaporation ; Convection ; Mass diffusivity ; Sediment
Subject in Chinese: 太阳辐射 ; 蒸发 ; 对流 ; 湖泊 ; 高温 ; 扩散 ; 传导 ; 水温 ; 地表水
Subject: SOLAR RADIATION ; EVAPORATION ; CONVECTION ; LAKES ; HEAT ; DIFFUSION ; CONDUCTION ; WATER TEMPERATURE ; SURFACE WATER
English Abstract: The source-sink term in water temperature models represents the net heat absorbed or released by a water system. This term is very important because it accounts for solar radiation that can significantly affect water temperature, especially in lakes. However, existing numerical methods for discretizing the source-sink term are very simplistic, causing significant deviations between simulation results and measured data. To address this problem, we present a numerical method specific to the source-sink term. A vertical one-dimensional heat conduction equation was chosen to describe water temperature changes. A two-step operator-splitting method was adopted as the numerical solution. In the first step, using the undetermined coefficient method, a high-order scheme was adopted for discretizing the source-sink term. In the second step, the diffusion term was discretized using the Crank-Nicolson scheme. The effectiveness and capability of the numerical method was assessed by performing numerical tests. Then, the proposed numerical method was applied to a simulation of Guozheng Lake (located in central China). The modeling results were in an excellent agreement with measured data.
Related Link: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0173236&type=printable
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Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/25594
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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Affiliation: School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan, China;School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan, China

Recommended Citation:
Zheng Jing,Ling Kang. High-order scheme for the source-sink term in a one-dimensional water temperature model[J]. PLOS ONE,2017-01-01,12(3)
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