| アイテムタイプ |
共通アイテムタイプ(1) |
| 公開日 |
2025-01-28 |
| タイトル |
|
|
タイトル |
Spur Dike Applications for the Sustainability of Channels in Incised Steep Bend Streams |
|
言語 |
en |
| 著者 |
Ohtsuki, Kazuaki
Kono, Takanori
Arikawa, Takashi
Taniwaki, Hisashi
厳島, 怜
|
| 著作権関連情報 |
|
|
権利情報Resource |
https://creativecommons.org/licenses/by/4.0/ |
|
権利情報 |
Copyright (c) 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Japan’s rivers are shaped by distinctive topography and abundant rainfall, and they face flooding and sediment supply escalation concerns under climate change. Small- and medium-sized rivers tend to catch unprecedented forces that exceed planned levels, leading to substantial widening and excavation. Thus, there is a demand for a method that is capable of managing significant flood flows over an extended period. The spur dike can maintain channel clearance by promoting erosion as well as providing bank protection. However, the effectiveness of this spur dike function has not been well studied in small- and medium-sized rivers and curved reaches. In this study, we evaluate the function of spur dikes in improving channel sustainability based on examples of small- and medium-sized rivers that have maintained their channel for more than ten years after spur dike installation. First, the applicability of the empirical rule was evaluated by comparing it with actual cases of erosion depths in curved sections in Japan. Next, one-dimensional simulations were performed to evaluate the sustainability of the section over a long period. Finally, a depth-averaged morphodynamic simulation, including the secondary flow effect, was applied to evaluate the location of the flow core and elevation changes due to the spur dike. The results showed that a slight difference in the ratio of river curvature radius to river width (r/B) caused the river channel to be erosive and sedimentary. The reasons for the difference were the cross-sectional expansion caused by the excavation of the bend and the difference in the plane flow regime caused by the shift of the flow core to the inside of the bend. Although it is structurally challenging to reproduce localized scour around a spur dike in a depth-averaged simulation, it is essential for designing to apply the simulation model and combine empirical knowledge. |
|
言語 |
en |
| 書誌情報 |
en : Water
巻 16,
号 4,
p. 575,
発行日 2024-02-15
|
| 出版社 |
|
|
出版者 |
MDPI |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
spur dike |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
channel sustainability |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
sedimentation |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
upstream |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
small- and medium-sized river |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| DOI |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.3390/w16040575 |
| ISSN |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
2073-4441 |
| 査読の有無 |
|
|
値 |
yes |
| 研究者情報 |
|
|
URL |
https://hyokadb02.jimu.kyutech.ac.jp/html/100001703_ja.html |
| 論文ID（連携） |
|
|
値 |
10443146 |
| 連携ID |
|
|
値 |
12508 |
10443146.pdf (3.3 MB)
