东京湾河口海流的长期观测

IF 1.9 3区 工程技术 Q3 ENGINEERING, CIVIL
S. Hosokawa, Shota Okura
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引用次数: 1

摘要

摘要自20世纪70年代以来,人们一直在观察东京湾河口的洋流模式。然而,早期使用短期观测和数值分析的研究在时空尺度上过于有限。这项研究分析了使用安装在穿越海湾河口的渡轮上的声学多普勒海流剖面仪获得的长期观测结果(超过十年)。这一长期观测数据集显示,潮流在海湾口占主导地位,残余流的河口环流与沿东京海底峡谷和浦贺海峡形成的地形路径流入海湾有关。流入的水量远远大于流入东京湾的四条主要河流的流量。尽管东侧表层的平均残余流是外流,但随着大量频繁的海洋流入,它是可变的,这可能导致了东侧的海洋环境。对长期观测结果的分析阐明了东京湾河口洋流模式的空间平均图和时间变异性。这些改进的知识和扩展的数据集将有助于回答有关东京湾水质的剩余问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Long-term observation of current at the mouth of Tokyo Bay
ABSTRACT Current patterns at the mouth of Tokyo Bay have been observed since the 1970s. However, earlier studies using short-term observations and numerical analyses were too limited in their spatiotemporal scale. This study analyzed long-term observations (over a decade) obtained using an acoustic Doppler current profiler mounted on a ferry that crosses the mouth of the bay. This long-term observation dataset revealed that tidal currents dominated at the bay mouth, and that an estuarine circulation of residual current was associated with inflow into the bay along topographic pathways formed by the Tokyo Submarine Canyon and the Uraga Channel. The water volume of the inflow was substantially greater than the discharge of the four major rivers flowing into Tokyo Bay. Although the mean residual current of the surface layer on the east side was outflow, it was variable with substantial and frequent inflow from the ocean, which might have caused an oceanic environment on the east side. Analysis of the long-term observations elucidated the spatial mean picture and temporal variability of the current patterns at the mouth of Tokyo Bay. This improved knowledge and the extended dataset will help answer remaining questions regarding the water quality in Tokyo Bay.
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来源期刊
Coastal Engineering Journal
Coastal Engineering Journal 工程技术-工程:大洋
CiteScore
4.60
自引率
8.30%
发文量
0
审稿时长
7.5 months
期刊介绍: Coastal Engineering Journal is a peer-reviewed medium for the publication of research achievements and engineering practices in the fields of coastal, harbor and offshore engineering. The CEJ editors welcome original papers and comprehensive reviews on waves and currents, sediment motion and morphodynamics, as well as on structures and facilities. Reports on conceptual developments and predictive methods of environmental processes are also published. Topics also include hard and soft technologies related to coastal zone development, shore protection, and prevention or mitigation of coastal disasters. The journal is intended to cover not only fundamental studies on analytical models, numerical computation and laboratory experiments, but also results of field measurements and case studies of real projects.
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