Density Intrusion and Variation in Dissolved Oxygen Concentrations in a Bay with a Sill at Its Mouth
Density Intrusion and Variation in Dissolved Oxygen Concentrations in a Bay with a Sill at Its Mouth
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湾口有窗台的密度侵入与溶解氧浓度变化
DOI：
10.1061/(asce)0733-9372(2007)133:4(447
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发表时间：
2007
影响因子：
2.2
通讯作者：
K. Nakayama
中科院分区：
文献类型：
--
作者：
Tomonari Okada;K. Nakayama
本文以一个典型的海湾为例，研究了海湾外水对海湾内水质的影响。日本大船渡湾外海水的影响用一维垂直溶解氧（DO）模型表示为潮汐引起的海水交换速率和海湾内外水密度差。采用非流体静力三维模型证实密度侵入的存在。使用一维垂直DO模型来研究海湾底层DO浓度的长期变化。结果表明，密度差异引起的海水交换对海湾底层缺氧水的形成和消失有显著影响。
This paper describes the influence of water outside a bay on water quality within the bay for a typical enclosed bay with a sill at its mouth. The influence of water outside Ohfunato Bay, Japan was expressed in a one-dimensional vertical dissolved oxygen (DO) model as the rate of seawater exchange caused by tides and the density difference between water inside and outside the bay. A nonhydrostatic, three-dimensional model was used to confirm the occurrence of density intrusions. A one-dimensional vertical DO model was used to examine long-term changes in DO concentrations in the bottom layer of the bay. Results indicated that seawater exchange caused by density differences had a significant effect on the formation and disappearance of anoxic water in the bay’s bottom layer.