| 闫圣，徐杰，邹志利，常承书，尤再进，王东，王召伟.裂流槽对丁坝附近裂流系统影响的试验研究[J].海洋工程,2025,(3):153~164 |
| 裂流槽对丁坝附近裂流系统影响的试验研究 |
| Experimental study on the effect of rip channels on the rip current system near a groin |
| 投稿时间：2024-04-27 修订日期：2024-07-09 |
| DOI：10.16483/j.issn.1005-9865.2025.03.014 |
| 中文关键词: 裂流 沙坝海岸 裂流沟槽 交叉波浪 丁坝 |
| 英文关键词:rip currents sandbar coast rip channel intersecting waves groin |
| 基金项目:国家自然科学基金资助项目（52201308，51879033）；中央高校基本科研业务费专项资金资助项目（3132024162）；海底工程技术与装备国际联合研究中心开放基金资助项目（HG20240204） |
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| 中文摘要: |
| 裂流是发生于海岸破波带内的一种常见的急而窄的离岸水流，对游客安全、海滩环境以及岸线侵蚀等均有重大影响。波浪在强反射丁坝附近会形成由入射波和反射波叠加的交叉波浪场，交叉波浪场中波高较小的节点区域会形成节点裂流，沙坝开槽以后还会形成沟槽裂流。在对不开槽沙坝海岸裂流系统研究的基础上，通过将沙坝整体切除一段形成裂流沟槽，研究了裂流槽对全反射丁坝附近裂流分布特征的影响，给出了裂流槽的存在引起的整个流场变化，以及开槽以后波浪反射区内各裂流单元的裂流流量及其他构成成分流量的变化。相比于无裂流槽情况，对有裂流槽的研究结果表明：波浪反射区内坝顶裂流流量显著增大，反射区内外的流量交换方向发生改变，且流量随着波高的增大而增加；反射区内各裂流单元的流量成分重新分布；对含有裂流槽的裂流单元，侧向流流入该单元使得裂流流量增大，而对不含裂流槽的裂流单元，侧向流对裂流流量的贡献变化不大。 |
| 英文摘要: |
| Rip currents are common narrow and fast offshore water flows that occur within the surf zone, with significant impacts on visitor safety, beach environments, and coastal erosion. Near a strongly reflective groin, incident and reflected waves combine to form a intersecting wave field. In this field, regions with lower wave heights create nodal rip currents, and channelized rip currents may form after the sandbar is notched. This study, based on previous research on rip current systems in unnotched sandbar coasts, investigates the impact of rip channels on the distribution characteristics of rip currents near a fully reflective groin by cutting a section of the sandbar to create a rip channel. The study presents the changes in the entire flow field induced by the rip channel and the variations in rip current flow and other component flow rates within the reflection zone after the rip channel is created. Compared to the case without a rip channel, the results for the system with a rip channel show a significant increase in the flow rate of rip currents at the sandbar crest in the reflection zone, with a reversal in the direction of flow exchange between the reflection zone and outer zone, and an increase in flow rate with higher wave heights. The flow composition within individual rip current cells in the reflection zone is redistributed. For rip current cells with a rip channel, lateral flows into these cells increase the rip current flow rate, whereas for cells without a rip channel, the contribution of lateral flows to the rip current flow rate remains relatively unchanged. |
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