The earth has an ocean area larger than the land area so that there are many beaches found throughout the world, including Indonesia. Behind its beauty, there is one phenomenon that endangers tourists when doing activities on the near shore area, namely: rip current. For example, the incident at the research location, namely Klayar Beach, East Java, on January 2, 2015, claimed lives. Therefore, this study aims to validate the existence of rip current in East Java, especially at the research location by utilizing hydrodynamic modeling in the era of the industrial revolution 4.0 based on data, internet, and technology as well as human resources during this corona pandemic. There are 3 stages of the methodology in this research, namely data collection and processing, modeling, and modeling validation. The outcomes of this research prove that the phenomenon of rip current with rip current speeds occurs in the range 0.16 - 0.18 m/s which causes 2 tourists to die. It is hoped that the results of this research can be used as input for the stakeholder concerned for the development of coastal tourism in coastal areas on the south coast of East Java in making policies.

地球的海洋面积大于陆地面积，因此世界各地都有许多海滩，包括印度尼西亚。在其美丽的背后，有一个在近岸地区进行活动时会危及游客的现象，即：离岸流。例如，2015 年 1 月 2 日在研究地点，即东爪哇的 Klayar 海滩发生的事件夺去了生命。因此，本研究旨在通过利用基于数据、互联网、技术和人力资源的工业革命 4.0 时代的水动力模型，验证东爪哇地区，特别是研究地点的裂口电流的存在。 . 本研究的方法学分为三个阶段，即数据收集和处理、建模和建模验证。本研究结果证明，在0.16-0.18 m/s范围内，随激流速度出现激流现象，导致2名游客死亡。希望本研究成果能够为东爪哇南部沿海地区沿海旅游发展相关利益相关方制定政策提供参考。