VNU Journal of Science Earth and Environmental Sciences, Vol 37, No 3 (2021) 73 87 73 Original Article Numerical Simulation of the Impact Response of Super Typhoon Rammasun (2014) on Hydrodynamics and Suspended Sediment in the Gulf of Tonkin Le Duc Cuong1,2,*, Do Huy Toan3, Dao Dinh Cham1, Nguyen Ba Thuy4, Du Van Toan5, Nguyen Minh Huan3, Nguyen Quoc Trinh1, Tran Anh Tu6, Le Xuan Sinh6 1Institute of Geography, VAST, Building A27, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam 2Graduate University[.]