研究者詳細 - 小橋　乃子

論文 - 小橋　乃子

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小松利光, 朴童津, 安達貴浩, 小橋乃子 . 3次元数値シミュレーションによる博多湾の密度流構造についての検討 . 海岸工学論文集 ( 48 ) 406 - 410 2001年査読

小橋乃子, 安達貴浩, 甲斐一洋, 西ノ首英之, 中村武弘, 多田彰秀, 矢野真一郎, 藤田和夫, 小松利光 . 新長崎漁港における成層と流況に関する現地観測 . 海岸工学論文集 ( 48 ) 1041 - 1045 2001年招待

小松利光, 齋田倫範, 小橋乃子, 安達貴浩, 柴田卓也 . 方向抵抗特性をもつ海底小規模構造物を用いた海底近傍の物質輸送の制御 . 水工学論文集 ( 45 ) 1087 - 1092 2001年査読

出版者・発行元：公益社団法人土木学会

The problem of beach erosion in our country grows more and more serious, so we must countermeasure against this problem without delay. Then we develop a effective method (we call the blocks used in this method BaNK block) to control sediment transport to cope with this serious problem. In this paper, we examine the fundamental properties of this method by laboratory experiments and field works in Nogita Coast. Firstly, we investigated the condition of flow occurrd when BaNK blocks were set in a wave progressing field by laboratory experiments. We confirmed that this method could make a flow at bottom layer and made a proper layout of BaNKblocks dear. Secondly, we set two kinds of blocks in Nogita Coast and observed a sediment transport around these blocks. By this field works we confirmed that sediment was transported by BaNKblocks to the direction we expected. From these results, we confirmed the possibility of beach nourishment by using BaNK blocks.

DOI： 10.2208/prohe.45.1087

小松利光, 小橋乃子, 田嶋健太郎, 藤田和夫, 安達貴浩, 矢野真一郎, 末松吉生, 甲斐一洋 . 底面粗度を用いた海域の水質改善技術の実用化へのアプローチ . 水工学論文集 ( 44 ) 957 - 962 2000年招待

出版者・発行元：公益社団法人土木学会

Nowadays water pollution caused by eutrophication in a semi-enclosed bay has been a serious problem. In order to solve this problem, a method has been proposed to activate the water exchange between an inner bay and its outer sea area by using Bottom Roughness with directional resistance properties. In this paper, a possibility for practical use of this method was examined from many angles. First, the basic effect of Bottom Roughness on substance transport was examined by a laboratory experiment Next, 2-dimensional numerical simulations were carried out to estimate the validity of this method in the Nagoya Port that has a complicated topography. Lastly, it was it-ported that four kinds of Bottom Roughness were sunk to investigate their influence on the scour of seabed and the water environment. From these results, it becomes clear that this method is efficient to improve the water quality in real sea areas.

DOI： 10.2208/prohe.44.957

小松利光, 朴童津, Shen Yongming, 安達貴浩, 小橋乃子 . 3次元数値シミュレーションによる博多湾の物質輸送メカニズムについての検討 . 海岸工学論文集 ( 47 ) 476 - 480 2000年招待

小松利光, 小橋乃子, 和田真人, 藤田和夫, 矢野真一郎, 安達貴浩 . 任意の方向に潮汐残差流を創造するための偏流型粗度の開発 . 水工学論文集 ( 43 ) 833 - 838 1999年査読

出版者・発行元：公益社団法人土木学会

Nowadays, water pollutions in many semi-enclosed bays have been a very serious social problem. In order to solve this problem, we have proposed the method to activate the water exchange between a bay and its outer sea area by using bottom roughness. In thisstudy, we developed two types of bottom roughness and examined their resistance properties experimentally. At first, the bottom roughness which could create the tide-induced residual current normal to the main tidal flow was improved. Then, it was made clear that the bottom roughness with the shape of a quarter sphere had the property to produce directly the tide-induced residual current not only in the parallel direction but also in the arbitrary direction to the main tidal flow. Finally, it was confirmed from the results of the numerical experiment that the combination of these bottom roughness could efficiently make a stronger residual circulation.

DOI： 10.2208/prohe.43.833

小松利光, 鞠承淇, 小橋乃子, 和田真人, 矢野真一郎 . 流れを偏向させる働きをもつ偏流型粗度を用いた潮汐残差流の創造 . 水工学論文集 ( 42 ) 577 - 582 1998年査読

出版者・発行元：公益社団法人土木学会

Nowadays in most of semi-enclosed bays water qualities have been deteriorated. Wehave proposed the method to create and control the tidal residual current by bottom roughnessfor activating the tidal exchange. In this paper we introduced the new type of bottomroughness with a function to bend the flow direction and experimentally developed the mosteffective shape. Next we tried to examine the effect of <I>the bending roughness</I> by numericasimulation in the model bay. As a result, it is made clear that quarters of the cylinder arrangedin two rows can get the large drag force in the normal direction of the flow and thatthe tidal exchange is promoted by the combination of the bottom roughness and the bending roughness.

DOI： 10.2208/prohe.42.577

小松利光, 鞠承淇, 矢野真一郎, 小橋乃子 . 細長い内湾において潮汐残差流が物質輸送に果たす役割 . 水工学論文集 ( 42 ) 589 - 594 1998年査読

出版者・発行元：公益社団法人土木学会

In a slender enclosed bay, which has a very long longitudinal length compared with a transverse width, the tidal residual current is composed of a series of circulations, that is so-called multi-cell structure. In order to examine the effect of multi-cell of tidal residual current on mass transfer and on the tidal exchange, numerical simulations of tidal current and contaminant transport were carried out in a slender model enclosed bay. As a result of this research, it turned out that the ratio of the scale of the tidal residual circulation (cell) to the dispersion scale is a very important factor for determination of the suitable pattern of the tidal residual current to activate the tidal exchange.

DOI： 10.2208/prohe.42.589

小松利光, 矢野真一郎, 小橋乃子, 鞠承淇, 藤田和夫 . 流れの方向により抵抗特性の異なる人工粗度の開発 . 水工学論文集 ( 41 ) 705 - 710 1997年査読

出版者・発行元：公益社団法人土木学会

These days, pollution in a stagnant water area of a semi-enclosed bay is recognized as one of serious water environmental problems. In order to activate the tidal exchange, we proposed a new method to create and control a tidal residual current by using artificial bottom roughness with directional resistance property. On the basis of this idea it was attempted to determine the most effective shape of roughness experimentally. As a result of this research, it was made clear that the half cylinder type, half sphere type and other two types could get large differences of drag coefficient between two flow directions.

DOI： 10.2208/prohe.41.705

小松利光, 矢野真一郎, 鞠承淇, 小橋乃子 . 方向性を持つ底面粗度を用いた潮汐残差流の創造と制御 . 水工学論文集 ( 41 ) 323 - 328 1997年査読

出版者・発行元：公益社団法人土木学会

Water pollution in a semi-enclosed sea area such as a bay or a fishing port due to stagnancy of water has been a serious problem on water environment. We proposed a new method to activate the tidal exchange between an inner and an outer sea area by creation and control of a tidal residual current. In this new method, the tidal residual current is produced and controlled by artificial structures, which change properties of resistance according to a direction of flow, set on the bottom. In this study, several tidal current and particle movement simulations with various arrangements of artificial bottom roughness in a semi-enclosed model bay were carried out. As a result of many kinds of numerical experiments, it becomes clear that it is possible to generate the tidal residual current and to activate the tidal exchange by only operation of bottom roughness.

DOI： 10.2208/prohe.41.323

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