Authors

Nguyen Trong Khanh 1 , Nguyen Huu Tuan 1 , Hoang Thi To Nu 1 , Can Thu Van 1*

Affiliations

1 HCMC University of Natural Resources and Environment; ntkhanh@hcmunre.edu.vn; nhtuan@hcmunre.edu.vn; httnu@hcmunre.edu.vn; ctvan@hcmunre.edu.vn

*Corresponding author: ctvan@hcmunre.edu.vn; Tel.: +84–983738347

Abstracts

This study was carried out to analyze and evaluate the change in the amount of suspended sediment on the Tien River in the Mekong Delta. Evaluating the sediment transport regime is a very important task to effectively serve the assessment of the level of evolution (erosion/accumulation) on the riverbed. This study applied the Mike 21FM hydrodynamic model to simulate the sediment transport regime on the section flowing through Cao Lanh district, Dong Thap province - where the erosion process is very complicated recently. The simulation results show that the largest number of displaced sediments appears on the right bank, the maximum amount of sludge transported ranges from 0.91 kg/m3 to 2.7 kg/m3. During the simulation period, the total amount of sediment that has moved downstream is about -218.7×106 m3, the depth is -233 cm, the average rate of erosion is -77.6 cm/year, where the deepest erosion can be up to -10.0 m.

Keywords

Cite this paper

Khanh, N.T.; Tuan, N.H.; Nu, H.T.T.; Van, C.T. Application of 2D hydro-dynamic model to simulate the suspended sediment on the Tien river, Cao Lanh district, Dong Thap province. J. Hydro-Meteorol. 2023, 16, 77-88. 

References

1. Son, N.T.; Duc, N.A. et al. Research to determine the cause of riverbank erosion and propose technology to warn and predict the level of riverbank erosion in some serious landslide areas in the Mekong Delta, Code: TNMT.2018.03.13. Project MONRE level, 2021.

2. Van, C.T. et al. Application of two-dimensional hydrodynamic model (MIKE 21FM) to simulate the sediment regime on Hau river, piloted in Long Xuyen city - An Giang province. Sci. Technol. Dev. J.: Sci. Earth Environ. 2021, 5(SI2), 1–13.

3. Bravard, J.P.; Petit, F. Geomorphology of streams and rivers. Encycl. Inland Waters 2009, 387–395. https://doi.org/10.1016/B978-012370626-3.00043-0.

4. Science and Technology Project at Ministry of Agriculture and Rural Development. Research on scientific and technological solutions to prevent sedimentation, stabilize flood drainage at Lai Giang estuary. National Key Laboratory of Rivers and Sea Dynamics, Vietnam Institute of Irrigation Science, 2008–2010.

5. State-level project: KC-08-29: Research and propose scientific and technological solutions to stabilize the riverbed downstream of Dong Nai and Saigon river systems for socio-economic development in the Southeast region. Southern Institute of Irrigation Science, 2005.

6. Reid, I.; Bathurst, J.C.; Carling, P.; Walling, D.E. (Eds): Applied fluvial geomorphology for river engineering and management, Chapter Sediment erosion, transport, and deposition. John Wiley and Sons, 1997, pp. 95-135.

7. Simon, A.; Collison, A.J.C. Quantifying the mechanical and hydrologic effects of riparian vegetation on streambank stability. Earth Surf. Processes Landforms 2002, 27, 527–546.

8. Fischenich, J.C. Channel erosion analysis and control. Proceedings of the Symposium on Headwaters Hydrology, American Water Resources Association, Bethesda Maryland, 1989, pp. 101–109.

9. Winterbottom, S.J.; Gilvear, D.J. A GIS-based approach to mapping probabilities of river bank erosion: regulated river Tummel, Scotland. Regul. Rivers Res. Manage. 2000, 16(2), 127–140. https://doi.org/10.1002/(SICI)1099-1646(200003/04)16:2<127:AID-RRR573>3.0.CO;2-Q.

10. Blazejewski, R.; Pilarczyk, K.W.; Przedwojski, B. (Eds): River Training Techniques: Fundamentals, Design and Applications. Rotterdam; Brookfield, Vt., Balkema, 1995, pp. 625.

11. Van, C.T.; Son, N.T.; Tuan, N.C. Research and experimental application of empirical formulas to calculate riverbank erosion in Tien River in Mekong Delta. J. Environ. Sci. Eng. A 2021, 10, 116–123. https://doi.org/10.17265/2162-5298/2021.03.003.

12. Te, V.T. et al. Research and forecast of sedimentation and erosion of the Dong Nai - Saigon river bed under the impact of the system of anti-flooding and environmental improvement works for Ho Chi Minh City area, Code: 21G/2009/HĐ-ĐHTL. Final report on state-level independent project, 2012.

13. Hung, L.M.; Ngoc, D.T.B. The empirical formula for calculating the bank erosion rate of the Tien river section in Thuong Phuoc area, Dong Thap province. J. Agric. Rural Dev. 2004, 06, 787–796.

14. Stephen, H.S.; Jia, Y. Simulation of sediment transport and channel morphology change in large river systems US-China workshop on advanced computational modelling in hydroscience & engineering. September 19-21, Oxford, Mississippi, USA, 2002.

15. Zuzana, A.; Mária, V.; Martin, J.; Michal, A.; Helena, H. Predicting the annual erosion rates on a small stream by the BANCS model. Soil Water Res. 2019, 14(4), 200–211. https://doi.org/10.17221/58/2018-SWR.

16. Hung, L.M., et al. Research on predicting erosion of the Mekong river bank. State-level science and technology projects. Southern Institute of Irrigation Science, 2001.

17. Hai, H.Q.; Trinh, V.T.M. Correlation between erosion - accretion in some areas of Tien and Hau river beds. Earth Sci. J. 2011, 31(1), 37–44.

18. Scott, S.H.; Jia, Y. Simulation of sediment transport and channel morphology change in large river systems US-China workshop on advanced computational modelling in hydroscience & engineering, September 19-21, Oxford, Mississippi, USA, 2002.

19. Final Report “Dong Thap province planning period 2021-2030, vision to 2050”, Dong Thap Province People’s Committee, 2022.

20. Ninh, L.V.; Giam, N.M. Climate characteristics of An Giang. VN. J. Hydrometeorol. 2017, 648, 18–26.

21. Hung, L.M. et al. Studying the influence of sand mining activities on changes in the channel of the Mekong River and proposing solutions to manage and plan reasonable exploitation, Code: 2010T/29. State-level independent scientific project, Southern Institute of Irrigation Science in the period, 2010–2013.

22. DHI. MIKE 21 & MIKE 3 Flow Model FM. Hydrodynamic Module. Scientific documentation, 2012.

23. DHI. MIKE 21 & MIKE 3 Flow Model FM. Hydrodynamic and Transport Module. Scientific documentation, 2012.