Behavior of fine sediment and its effect on the formation of hypoxia in estuaries.

河口细泥沙行为及其对缺氧形成的影响.

• 批准号: 13450202
• 负责人: ISHIKAWA Tadaharu
• 金额: $ 5.95万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450202/
• 关键词: estuary; salt water flow; fine sediment hypoxia; field measurement; numerical simulation; river planning; 河川計画; 貧酸素水塊; 河潮域

In conventional manuals for river improvement works, in which ordinary river channels are taken as a standard object of planning, do not refer to the special aspects of the estuarine part of downstream reaches. In this research, aiming the future reform of the standard of river improvement works, hydraulic factors related to the fine sedimentation in estuaries are investigated in downstream reaches of some rivers whose hydraulic characteristics are different from one another.In Tone River Estuary, suspension of fine sediment was measured in the salt wedge by using some up-to-date measurement techniques including acoustic turbulence measurement, and the effect of fine sediment on the formation of hypoxia in the head of salt wedge was estimated. In Oppa Bay, where Kitakami River flows in, the deterioration of bay water by the effect of river freshets containing a lot of fine sediment was investigated through field observation and satellite image analysis. In Takase River Estuary, the effect of bed topography, especially of shallow area made by the deposition of fine sediment, on the salt water intrusion was estimated by field measurements and numerical simulation.

在传统的河流治理工程手册中，普通河道被视为规划的标准对象，没有提到下游河口部分的特殊方面。本研究以未来河道整治标准的改革为目标，针对不同水力特性的河流，对影响河口细颗粒泥沙运动的水力学因素进行了研究，在同河河口，采用声学紊流测量等现代测量技术，并估算了细颗粒泥沙对盐楔头部缺氧形成的影响。在北上川的流入地Oppa湾，通过实地观测和卫星图像分析，研究了由于含有大量细颗粒泥沙的河流支流的影响，海湾水质恶化的情况。在高濑河口，通过现场测量和数值模拟，评估了河床地形，特别是细颗粒泥沙沉积形成的浅水区对盐水入侵的影响。

项目成果

石神卓美, 入江光輝, 井上陽介, 石川忠晴: "石垣島アンパル干潟における底質分布特性について"第31回土木学会関東支部技術研究発表会講演概要集. (2004)

Takumi Ishigami、Mitsuteru Irie、Yosuke Inoue、Tadaharu Ishikawa：“关于石垣岛安帕鲁滩涂沉积物分布的特征”第 31 届日本土木学会关东分会技术研究报告摘要（2004 年）。

Suzuki, T., Ishikawa, T., Yokoyama, K.: "Field measurement and numerical simulation of Estuarine circulation in a river estuary"Proceedings of River Engineering. Vol.9. 259-264 (2003)

Suzuki, T.、Ishikawa, T.、Yokoyama, K.：“河口河口环流的现场测量和数值模拟”河流工程学报。

Irie, M., Ishikawa, T.: "Tirial production of float type towed vehicles"Annual J. of Hydraulic Eng., JSCE. Vol.48. 751-756 (2004)

Irie, M., Ishikawa, T.：“浮式牵引车的试制”，液压工程年刊，JSCE。

鈴木伴征, 大作和弘, 横山勝英, 石川忠晴: "利根川河口堰下流部における濁質の浮上とそれに伴う酸素消費"水工学論文集. 第46巻. 917-922 (2002)

Tomoyuki Suzuki、Kazuhiro Daisaku、Katsuhide Yokoyama、Tadaharu Ishikawa：“利根川河口堰下游的浊度漂浮和相关耗氧量”水利工程学杂志，第 46 卷，917-922 (2002)

成田舞, 石川忠晴, 高橋淳: "青森県高瀬川の河口部変動特性について"海岸工学論文集. 第49巻. 526-530 (2002)

成田麻衣、石川忠晴、高桥淳：“青森县高濑川河口波动特征”海岸工程论文第 49 卷。526-530（2002 年）