Barrier geomorphology based on intertidal soil-hydro dynamics

基于潮间带土壤水动力学的屏障地貌学

• 批准号: 22656107
• 负责人: SASSA Shinji
• 金额: $ 2.35万
• 依托单位: Independent Administrative Institution Port and Airport Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22656107/
• 关键词: バリア地形; 潮間帯; サクション; 漂砂; 津波; 砂州; デザイン

A comprehensive set of field observations/surveys, laboratory tests and analyses for the artificially created sandbars in Tokyo Bay, Japan, were performed in order to clarify our recently found mechanism of the morphodynamic stability of intertidal sandbars. The results clearly demonstrated that in the morphodynamic processes where the sediments moved from the unsaturated zone to the saturated zone, namely, where the suction-dynamics induced sediment compaction and associated increase in the surface shear strength became pronounced, the self-stabilization of the intertidal sandbars manifested owing to the impact of the suction dynamics effects on erosion. On the basis of these results, we proposed an optimal design of such dynamically stable sandbars. Our findings can be used widely for the creation and maintanance of such morphological features, which are often crucial for disaster reduction, as well as for conservation and restoration of habitats with diverse biological activity.

为了阐明我们最近发现的潮间带沙洲形态动力稳定性的机制，对日本东京湾人工建造的沙洲进行了一系列全面的野外观测/调查、实验室测试和分析。结果表明，在沉积物从非饱和区向饱和区移动的形态动力学过程中，即在吸力动力学引起的沉积物压实和相关的表面剪切强度增加变得明显的地方，由于吸力动力学对侵蚀的影响，潮间沙洲的自稳定性表现出来。在此基础上，提出了动力稳定沙洲的优化设计方案。我们的研究结果可以广泛用于创建和维护这种形态特征，这往往是至关重要的减灾，以及保护和恢复栖息地与不同的生物活动。

项目成果

Role of suction in sandy beach habitats and the distributions of three amphipod and isopod species

吸力在沙滩生境中的作用以及三种片足类和等足类动物的分布

• DOI: 10.1016/j.seares.2013.06.005
• 发表时间: 2014
• 期刊: Journal of Sea Research
• 影响因子: 2
• 作者: Sassa;S.;Yang;S.;Watabe;Y.;Kajihara;N. and Takada;Y
• 通讯作者: Y

Physical modeling for Ecological Geotechnics

生态岩土工程物理建模

• 发表时间: 2010
• 期刊: Proc.7th Int.Conf.on Physical Modelling in Geotechnics
• 作者: Sassa;S.
• 通讯作者: S.

Role of waterfront geoenvironment as habitats in the activities of crabs, bivalves, and birds for biodiversity restoration

滨水地质环境作为螃蟹、双壳类和鸟类活动栖息地在生物多样性恢复中的作用

• 发表时间: 2012
• 作者: Sassa;S.;Watabe;Y.;Yang;S. and Kuwae;T
• 通讯作者: T

中間軟弱層を含む干潟地盤の地層断面推定精度の向上-MASW と微動アレイ探査の併用

提高包括中间软层在内的潮坪地层断面估算精度——MASW与微震阵勘探相结合

• 发表时间: 2011
• 期刊: 土木学会論文集B2(海岸工学)
• 作者: Hidekatsu Hamaoka;Toru Hagiwara;宮川愛由,大井貴之,藤井聡;谷口守・芝池綾・橋本成仁;渡部要一,佐々真治,山田文彦
• 通讯作者: 渡部要一,佐々真治,山田文彦

Effects of sediment hardness on the upper limit of the distribution of the burrowing amphipod Haustorioides japonicus on sandy shores: a field evaluation

沉积物硬度对沙质海岸穴居片脚类 Haustorioides japonicus 分布上限的影响：现场评价

• 发表时间: 2013
• 期刊: Plankton and Benthos Research
• 影响因子: 0.6
• 作者: Takada;Y.;Kajihara;N. and Sassa;S
• 通讯作者: S