Vo Quoc Thanh is currently a PhD fellow in the Department of Water Science and Engineering, IHE Delft (Institution for Water Education) and TU Delft, the Netherlands. He graduated from MSc Programme of Environmental Management in Can Tho University, Vietnam. After graduated, he has worked as a researcher in the College of Environment and Natural Resources, Can Tho University until 2013. Then he has been working as a lecturer at Can Tho University. At the meantime, he participated in serveral research projects, such as “Mapping of flood hazards for different climate change scenarios for the Mekong Delta, Vietnam” in Post-Doctoral Research Programme on Adaptation to Climate Change (PRoACC phase 1) and Climate change affecting land use in the Mekong Delta: adaptation of rice-based cropping systems (CLUES). He investigates impact of sea level rise and human interference on hydrological regime and sediment dynamics in the Mekong Delta in his PhD research which is a part of project of Modeling a sparsely-sampled, complex delta system: Mekong delta case study, funded by Office of Naval Research.
TopicImpact of sea level rise and human interference on sediment dynamics in the Mekong Delta
Fluvial sediment is the major source for the formation and development of the Mekong Delta. This paper aims to analyse the dynamics of suspended sediment and to investigate the roles of different processes in order to explore flux pattern changes. We applied modelling on two scales, comprising a large-scale model (the whole delta) to consider the upstream characteristics, particularly the Tonle Sap Lake's flood regulation, and a smaller-scale model (tidal rivers and shelf) to understand the sediment processes on the subaqueous delta. A comprehensive comparison to in-situ measurements and remote sensing data demonstrated that the model is capable of qualitatively simulating sediment dynamics on the subaqueous delta. It estimates that the Mekong River supplied an amount of 41.5 mil tons from April 2014 to April 2015.
A substantial amount of sediment delivered by the Mekong River is deposited in front of the river mouths in the high flow season and resuspended in the low flow season. A sensitivity analysis shows that waves, baroclinic effects and bed composition strongly influence suspended sediment distribution and transport on the shelf. Waves in particular play an essential role in sediment resuspension. The development of this model is an important step towards an operational model for scientific and engineering applications, since the model is capable of predicting tidal propagation and discharge distribution through the main branches, and in predicting the seasonal SSC and erosion/deposition patterns on the shelf.
Thanh, V.Q., Reyns, J., Wackerman, C., Eidam, E.F., Roelvink, D., 2017. Modelling suspended sediment dynamics on the subaqueous delta of the Mekong River. Cont. Shelf Res. 147, 213–230. doi:10.1016/j.csr.2017.07.013
Meselhe, E., Roelvink, D., Wackerman, C., Xing, F., Thanh, V.Q., 2017. Modeling the process response of coastal and deltaic systems to human and global changes: Focus on the Mekong system. Oceanography 30, 84–97.
Balica, S., Dinh, Q., Popescu, I., Vo, T.Q., Pham, D.Q., 2014. Flood impact in the Mekong Delta, Vietnam. J. Maps 10, 257–268. doi:10.1080/17445647.2013.859636
Thanh, V.Q., Hoanh, C.T., Trung, N.H., Tri, V.P.D., 2014. A bias-correction method of precipitation data generated by regional climate model. Int. Symp. Geoinformatics Spat. Infrastruct. Dev. Earth Allied Sci. 2014 1, 1–6.
Tri, V.P.D., Trung, N.H., Thanh, V.Q., 2013. Vulnerability to flood in the Vietnamese Mekong Delta : mapping and uncertainty assessment. J. Environ. Sci. Eng. B 2, 229–237.
Nguyen Thi Bich Phuong, Van Pham Dang Tri and Vo Quoc Thanh, 2015. Impacts of land use change on the hydrological characteristics of the Duong Dong river basin, Phu Quoc island. Journal of Science, Can Tho University - Part A: Natural Sciences, Technology and Environment, 40: 81 - 91 (Vietnamese).
Nguyen Phuong Tan, Van Pham Dang Tri and Vo Quoc Thanh, 2014. Application of two-dimensional hydrodynamic model for simulations of hydraulic characteristics and deposition and erosion in the Dinh An estuary. Journal of Science, Can Tho University - Part A: Natural Sciences, Technology and Environment, 31a: 8-17 (Vietnamese).
Vo Thi Phuong Linh, Van Pham Dang Tri , Nguyen Hieu Trung, Vo Quoc Thanh and Nguyen Thanh Tuu, 2013. Assessment of hydrological and landuse dynamic in the Vietnamese Mekong Delta. Journal of Science, Can Tho University - Part A: Natural Sciences, Technology and Environment, 27: 87-94 (Vietnamese)