Bài viết trình bày một số đặc điểm xuất hiện dòng Rip tại các bãi tắm chính của Quảng Nam; từ đó có những định hướng để dự báo sự xuất hiện dòng Rip làm cơ sở cho công tác cứu hộ bãi tắm tốt hơn. | Đặc điểm xuất hiện dòng Rip Rip current tại bãi tắm Hà My Điện Bàn Tam Thanh Tam Kỳ tỉnh Quảng Nam Vietnam Journal of Marine Science and Technology Vol. 19 No. 4A 2019 43 53 DOI https 1859-3097 19 4A 14587 https jmst Occurrence features of Rip current at Ha My Dien Ban district and Tam Thanh Tam Ky city beaches Quang Nam province Le Dinh Mau1 Nguyen Van Tuan1 Nguyen Chi Cong1 Tran Van Binh1 Pham Ba Trung1 Pham Sy Hoan1 Ngo Quang Bao Hoang2 Phan Thi Ha Tuyen2 1 Institute of Oceanography VAST Vietnam 2 University of Science Vietnam National University Ho Chi Minh City Vietnam E-mail Received 30 July 2019 Accepted 6 October 2019 2019 Vietnam Academy of Science and Technology VAST Abstract Rip current is a relatively strong narrow current flowing outward from the beach through the surf zone and presenting a hazard to swimmers. This paper presents some occurrence features of Rip current at main swimming beaches in Quang Nam province Central Vietnam. Study results show that most of swimming beaches along Quang Nam province coast are directly opposed to open sea and strongly affected by swell. Therefore Rip current system can occur at any time in the year with large dimension and intensity. During Northeast monsoon November to March beach morphology is considerably changed by strong wave action thus the strongest rip current is formed. However in this period careful swimmers can easily identify where that rip current occurs along the beach. During the transition period from Northeast monsoon to Southwest monsoon April to May wave energy is reduced thus Rip current intensity is also decreased. During Southwest monsoon June to August wave energy is not strong and beach is accreted therefore some Rip currents remain at reasonable morphology places along the beach. During the transition period from Southwest monsoon to Northeast monsoon September to October Rip current can occur at deep places along the beach
