NUMERICAL STUDY OF WAVE CONTROL FUNCTION OF THE SLIPWAY IN A FISHING PORT
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- KANEKO Tsuyoshi
- （株）荒谷建設コンサルタント 品質企画部
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- OHMURA Yoshihiro
- 国立研究開発法人水産研究・教育機構 水産技術研究所
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- FURUICHI Naoki
- 国立研究開発法人水産研究・教育機構 水産技術研究所
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- SAEKI Shinya
- （株）荒谷建設コンサルタント 四国支社
Bibliographic Information
- Other Title
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- 漁港の斜路の波浪制御特性に関する数値的検討
- ギョコウ ノ シャロ ノ ハロウ セイギョ トクセイ ニ カンスル スウチテキ ケントウ
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Abstract
<p> Port construction engineers has long recognized that the slipway, which is frequently set in a fishing port, has a reflection coefficient smaller than that on an upright breakwater and thus plays an important role in ensuring the harbor tranquility. In the harbor tranquility analysis, the reflection coefficient of the slipway is set with refer to that of the natural beach of 0.05 to 0.2, because there are few studies on the wave control function assuming the slipway in a fishing port. On the other hand, it has been pointed out that the reflection coefficient of the natural beach gets closer to 1.0 for long-period waves. In this study, we investigated wave breaking and reflection process on the slipway under regular wave condition using CADMAS-SURF V5.1. We confirmed that the reflection coefficient increases as the slope gradient becomes steeper or the wave steepness decreases, which is the same tendency as in the previous study under uniform slope condition. It was also shown that applying a uniform constant in the harbor tranquility analysis is not always appropriate. Using the results from numerical calculation and introducing the surf similarity parameter ξ0, we presented a formula to find the reflection coefficient on the slipway in a fishing port under regular waves.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 77 (2), I_259-I_264, 2021
Japan Society of Civil Engineers