Bài báo trình bày một số kết quả tính toán, mô phỏng dòng Rip tại các bãi tắm chính gồm: Hà My, Bình Minh, Tam Thanh và bãi Rạng thuộc tỉnh Quảng Nam trong hai mùa gió điển hình Đông Bắc (hướng gió đông bắc, cấp gió: 4, 5, 6) và Tây Nam (hướng gió đông nam, cấp gió: 4, 5) sử dụng mô hình Mike 21. Kết quả tính toán cho thấy, trong mùa gió Đông Bắc, gió cấp 4, dòng Rip hình thành tại tất cả các bãi tắm. | Mô phỏng dòng Rip Rip current tại một số bãi tắm ven biển tỉnh Quảng Nam Vietnam Journal of Marine Science and Technology Vol. 19 No. 3B 2019 113 124 DOI https 1859-3097 19 3B 14519 https jmst Rip current simulation on some beaches in coastal Quang Nam province Nguyen Chi Cong Le Dinh Mau Nguyen Van Tuan Nguyen Thi Thuy Dung Phan Thanh Bac Pham Sy Hoan Tran Van Binh Institute of Oceanography VAST Vietnam E-mail nguyenle_cong@ Received 25 July 2019 Accepted 6 October 2019 2019 Vietnam Academy of Science and Technology VAST Abstract This paper presents modelling results of rip currents on the main beaches along coastal Quang Nam province including Ha My Binh Minh Tam Thanh and Rang beaches during two typical wind seasons Northeast monsoon Northeast wind direction wind levels 4 5 6 and Southwest monsoon Southeast wind direction wind levels 4 5 using Mike 21 model. Calculation results show that during the Northeast monsoon the rip current formed in all beaches. In the scenario of level 4 of wind speed average rip speed was about 40 50 cm s. In particular at Tam Thanh beach area the rip was a typical one with the components such as feeder current rip neck and rip head. With the level 5 of wind field the formation of the rip was clearer the speed of the rip was stronger average value was about 50 60 cm s. Meanwhile with the level 6 of wind field the typical rip structure was broken creating local eddies or longshore currents at some positions but strengthened at other positions. During the Southwest monsoon the rip current did not form at the beaches and the longshore currents were dominant. Keywords Rip current Mike 21 model Quang Nam swimming beach drowning accident. Citation Nguyen Chi Cong Le Dinh Mau Nguyen Van Tuan Nguyen Thi Thuy Dung Phan Thanh Bac Pham Sy Hoan Tran Van Binh 2019. Rip current simulation on some beaches in coastal Quang Nam province. Vietnam Journal of Marine Science and Technology 19 3B 113 124.
