This study has established and calibrated a three-dimensional system model with a combination of hydraulics-waves and suspended sediment transport with measured data in the study area. Based on the calculated scenarios for the flood and the dry seasons, the results show the occurrence of MTZs in the riparian zone of the Mekong river with typical suspended sediment concentrations (SSC) ranging from – kg/m3 dry season and – kg/m3 flood season. | Vietnam Journal of Marine Science and Technology 2023 23 3 247 264 Vietnam Academy of Science and Technology Vietnam Journal of Marine Science and Technology journal homepage jmst Characteristics of suspended sediment concentration and distribution of maximum coastal turbidity of the Mekong river Nguyen Ngoc Tien Institute of Marine Geology and Geophysics VAST Vietnam Received 29 December 2022 Accepted 9 April 2023 ABSTRACT This paper presents the results of applying a 3D mathematical model to study the in the Mekong riverside area s maximum turbidity zone MTZ . This study has established and calibrated a three-dimensional system model with a combination of hydraulics-waves and suspended sediment transport with measured data in the study area. Based on the calculated scenarios for the flood and the dry seasons the results show the occurrence of MTZs in the riparian zone of the Mekong river with typical suspended sediment concentrations SSC ranging from kg m3 dry season and kg m3 flood season. The location and size of the MTZs change seasonally with the interaction between freshwater and tidal oscillations. They appear more in the dry season. At high tide seawater with high salinity intrudes into estuaries with a range of up to 50 km causing disturbance and flocculation. While in the flood season the distribution of the largest turbidity has moved the floodplain with a range of about 20 km. Keywords Maximum turbidity transport of suspended sediment Mekong river. Corresponding author at Institute of Marine Geology and Geophysics 18 Hoang Quoc Viet Cau Giay Hanoi Vietnam. E-mail addresses nntien@ https 1859-3097 18633 ISSN 1859-3097 e-ISSN 2815-5904 2023 Vietnam Academy of Science and Technology VAST 247 Nguyen Ngoc Tien Vietnam Journal of Marine Science and Technology 2023 23 3 247 264 INTRODUCTION Maximum turbidity zone MTZ in estuaries are features in some coastal estuaries where large amounts of .
