Contaminant transport in wetland flows: Different fate between the upper and bottom layers
Contaminant transport in wetland flows: Different fate between the upper and bottom layers
复制标题
湿地流中的污染物迁移：上层和底层之间的不同命运
DOI：
10.1016/j.jclepro.2019.119040
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发表时间：
2020-02
影响因子：
11.1
通讯作者：
Zhang Zhiqiang
中科院分区：
文献类型：
--
作者：
Wang Ping;Zeng Li;Jiang Weiquan;Zhang Zhiqiang
污染物在湿地水流中的迁移机理在各种应用中起着核心作用。一个两区模型被用来研究传输过程。上层和底层之间的浓度的显着不同的命运的特点。该模型为快速捕捉污染物浓度的演化过程提供了一种实用的工具，在工程科学中具有重要意义。计算结果与数值解吻合较好，表明在瞬态扩散阶段，上层快速移动区和底层慢速移动区的浓度表现出明显的差异。这两个浓度分别形成了一条前导右偏高斯曲线和一条拖尾左偏高斯曲线。在界面垂直扩散的作用下，两种浓度逐渐接近深度平均值，最终均演化为渐近高斯分布。当无量纲时间为1.0时，两个区域之间的浓度变化率达到约50%，过程福尔斯进入渐近泰勒色散阶段。即使在无量纲时间10.0大一个数量级时，它仍然保持在10%左右。这两种浓度的不同归宿的研究结果将为相关区域的底栖生物和浮游生物的研究提供有意义的信息。
The mechanism of contaminant transport in wetland flows plays a central role in various applications. A two-zone model is applied to study the transport process. The significantly different fate of concentrations between the upper and bottom layers is characterized. This model provides a practicable and useful tool to quickly capture the evolution of contaminant concentration, being of particular importance in engineering science. The results agree well with the numerical solutions, which reveal that the concentrations in the fast-moving zone in the upper layer and in the slow-moving zone in the bottom layer perform quite different in the transient dispersion stage. The two concentrations respectively form a leading right-skewed Gaussian curve and a tailing left-skewed Gaussian one. Under the effect of vertical diffusion at the interface of two zones, the two concentrations gradually approach the depth-averaged mean, and all evolve to asymptotically Gaussian distribution finally. The concentration variation rate between the two zones reaches about 50% as the process falls into the asymptotic Taylor dispersion stage at dimensionless time 1.0. And it remains about 10% even at one order larger dimensionless time 10.0. The findings of the different fate of two concentrations will offer meaningful information to study the benthon and plankton in related areas.
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影响因子：
3.1
作者：
Zeng, L.;Chen, G. Q.
通讯作者：
Chen, G. Q.
岸墙效应主导的湿地流中双组分污染物的纵向扩散
影响因子：
6.4
作者：
L. Zeng;Y.J. Zhao;B. Chen;P. Ji;Y.H. Wu;L. Feng
通讯作者：
L. Feng
湿地流中环境扩散的浓度分布：扩展解
影响因子：
6.4
作者：
Jiang Wei-Quan;Wang Ping;Chen G. Q.
通讯作者：
Chen G. Q.
DOI：
10.1007/978-94-009-2825-1_8
发表时间：
1988
期刊：
--
影响因子：
--
作者：
J. Brady;D. Koch
通讯作者：
J. Brady;D. Koch
影响因子：
5.4
作者：
Yong Huang;J. Saiers;J. Harvey;G. Noe;S. Mylon
通讯作者：
Yong Huang;J. Saiers;J. Harvey;G. Noe;S. Mylon