| 摘要: |
| 基于拉格朗日余流及其输运过程的一种三维空间弱非线性理论，进一步修定Si在河口中的无因次化学转移项量级为K2，给出了Si的长期输运方程。对于一种二维模型河口，数值求解了零阶天文潮、欧拉余流、斯托克斯漂移、拉格朗日余流和盐度（s）的分布；分别计算了平均逗留时间为10，30，60，180d等所对应的Si浓度分布；给出了Si-s相关图，讨论了河口中Si的保守性问题。 |
| 关键词: 河口 Si-s相关曲线 输运过程 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49136140 |
附件 |
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| STUDY ON THE DISSOLVED SILICA TRANSPORT PROCESS IN ESTUARIES |
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Wang Hui1, Feng Shizuo2
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1.The Department of Gcophysics, Beijing University, Beijing 100871;2.Institute of Physicial Oceanography. Ocean University of Qingdao, Qingdqo 266003
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| Abstract: |
| The Long-term transport equation of dissolved silica in estuaries is deduced by using a three-dimensional theory of weakly nonlinear Lagrangian residual current and transport, and assuming the order of the silica uptake as k2.
(For the equations please see the PDF file.)
The convective velocity is the first-order Lagrangian residual current, i. e., the mass-transport velocity (uLM, vLM,wLM). Si0 is the zero-order Silica concentrations. ι is the average residence time of silica in estuaries. The numerical simulations of Euler residual current, St0ke’s drift, and Lagrangian residual current are carried out for a model estuary and the silica concentrations are calculated for average residence time of 10 days, 30 days, 60 days, 180 days and so on. The numerical results show that the Lagrangian residual current has a good continuity estuary. The direction of it in upper layer point to upper reaches of the estuary. Yet, the direction of it in lower layer point to lower reaches of the estuary. The silica salinity curves are given and the conservative and non-conservative characters of silica in estuaries are discussed. The results show that the conservative and non-consernative characters depend on average residence time, runoff, thickness of photic zone and the length of estuary. |
| Key words: Estuary, The silica-salinity curves, Transport process |
