深圳西涌滨海旅游区海滩裂流风险评估及特征分析-海洋预报

深圳西涌滨海旅游区海滩裂流风险评估及特征分析

单位：1. 国家海洋局南海预报中心, 广东广州 510300;
2. 自然资源部海洋环境探测技术与应用重点实验室, 广东广州 510300;
3. 深圳市海洋监测预报中心, 广东深圳 518067

分类号：P731.21

出版年·卷·期（页码）：2021·38·第一期（61-66）

摘要：

基于海滩地形动力学、遥感影像的风险预识别以及现场排查等方法，对西涌滨海旅游区海滩裂流风险进行了初步评估。评估结果表明：地形动力分析结果显示，西涌滨海旅游区泳场逐月平均沙滩类型大部分是沿岸沙坝和裂流沟槽交替的沙坝型（B），风险等级高；影像特征判断该沙滩属于沿岸沙坝和裂流沟槽交替的沙坝型（B）或者低潮位附近伴有冲流沙坝及裂流沟槽的低潮沙坝裂流型（LTBR），裂流风险等级高；历史影像和现场调研均发现该海滩发生过裂流；综合判定该海滩裂流风险等级为高。但鉴于观测资料限制和评价方法自身局限性的影响，本次排查结论仅为初步结论，其合理性尚需更加深入的研究。

Based on the beach morphodynamics, the risk pre-identification using remote sensing image and the on-site risk investigation, this paper makes a preliminary assessment of the risk of rip current in the beach of Xichong coastal tourism area of Shenzhen. It is found that the monthly average beach type mostly is barred (B) with high risk level as shown by the beach morphodynamics, while the remote sensing image approves that the beach belongs to the type of barred (B) or the low-tide bar rip (LTBR) with high risk of rip current. Meanwhile, historical rip current events are found by remote sensing image and on-site investigation. Therefore, we preliminarily conclude that the risk level of rip current is high with uncertainties due to the limitation of observation data and assessment method.

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