Authors

Nguyen Van Hong 1* , Nguyen Thao Hien 1 , Nguyen Thi Thanh Minh 1 , Ho Cong Toan 1

Affiliations

1Sub-Institute of Hydrometeorology and Climate Change; nguyenvanhong79@gmail.com; nthien2710@gmail.com; minhmminh0419@gmail.com; hocongtoanhdh@gmail.com;

*Correspondence: nguyenvanhong79@gmail.com; Tel: +84–913613206

Abstracts

Saline intrusion is one of the most frequently occurring natural disasters in a coastal area, posing the most serious impact in the Vietnamese Mekong Delta (MD). With the characteristics of the region as an open and low system, located at the end of the Mekong River basin and part of the Vam Co River system, this region is strongly affected by the tidal regime, and therefore saline intrusion is a feature of the region and has become familiar to the people living here in the dry season. The degree of deep penetration into the inland area depends on several factors. These factors contribute to the determination of the depth of salinity penetration into the MD. Therefore, the paper will focus on the 3 factors having the greatest impacts on the salinity penetration, including the influence of upstream flow, high tide, and the northeast monsoon season in the application of a combined assessment model to forecast saline intrusion in 2021 in the Mekong Delta. The reliability of the salinity propagation module is greater than 0.7%, based on the data series observed and calculated daily for 3 months during the dry season. The location of the measuring stations from the estuary to the inland field is about 20–50 km, showing a suitable range to calculate the salinity forecast to support livelihood models in the Mekong River.

Keywords

Saline intrusion; Upstream flow; Tide; Southeast wind; Vietnamese Mekong Delta.

Cite this paper

Hong, N.V.; Hien, N.T.; Minh, N.T.T.; Toan, H.C. Forecasting saline intrusion under the influence of the northeast monsoon in the Mekong Delta. VN J. Hydrometeorol. 2021, 9, 23-36. 

References

1. Binh, D.V.; Kantoush, S.; Sumi, T.; Mai, N.T.; Trung, L.V. Study on the impacts of river–damming and climate change on the Mekong Delta of Vietnam. Disaster Prev. Res. Inst. Annuals 2017, 60(B), 804–826.
2. Duong, T.A.; Bui, M.D.; Rutschmann, P. Impact of Climate Change on Salinity Intrusion in the Mekong Delta. Presented at the 14th International Conference on Environmental Science and Technology (CEST2015), Rhodes, Greece, 2015.
3. Dat, T.Q.; Likitdecharote, K.; Srisatit, T.; Trung, N.H. Modeling The Influence of River Discharge and Sea Level Rise on Salinity Intrusion in Mekong Delta. In First Environment Asia International Conference on “Environmental Supporting in Food and Energy Security: Crisis and Opportunity”, 2011, 685–701.
4. Tuan, T.V.; Thuong, T.V.; Phat, H.P.D.; Hung, D.N. Assessing the Combined Impacts of Dams Upstream, Climate Change, Drought, Tide, and Sea Level Rise on the Temporal Variation of Paddy Land in Tien Giang Province. IOP Conf. Ser. Earth Environ. Sci. 2019, 338.
5. Ba, L.H.; Drought, saline intrusion in the Mekong Delta: Theoretical and Practical Basis. Ho Chi Minh City National University Publishing House, 2017, pp. 525, ISBN: 978604735283.
6. Mai, N.P.; Kantoush, S.; Sumi, T.; Thang, T.D.; Trung, L.V.; Van Binh, D. Assessing and Adapting The Impacts of Dams Operation and Sea Level Rising on Saltwater Intrusions into The Vietnamese Mekong Delta. J. Jpn. Soc. Civ. Eng. Ser. B1, 2018, 74(5), I_373–I_378.
7. Dung, N.T.; Thuan, P.; Lan, N.T. Livelihoods of residents in drought–salt areas in the Mekong Delta – Situation and solutions. J. Political Sci. Inf. 2020, 4, 77–80.               
8. Kantoush, S.; Binh, D.V.; Sumi, T.; Trung, L.V. Impact of Upstream Hydropower Dams and Climate Change on Hydrodynamics of Vietnamese Mekong Delta. Annu. J. Hydraul. Eng. JSCE 2017, 61, I_109–I_114.
9. Khang, D.K.; Kotera, A.; Sakamoto, T.; Yokozawa, M. Sensitivity of Salinity Intrusion to Sea Level Rise and River Flow Change in Vietnamese Mekong Delta–Impacts on Availability of Irrigation Water for Rice Cropping. J. Agric. Meteorol. 2008, 64, 167–176. 
10. Le, T.N.; Tran, D.X.; Tran, T.V.; Gyeltshen, S.; Lam, T.V.; Luu, T.H.; Nguyen, D.Q.; Dao, T.V. Estimating Soil Water Susceptibility to Salinization in the Mekong River Delta Using a Modified DRASTIC Model. Water 2021, 13, 1636. https://doi.org/10.3390/w13121636.
11. Hai, Đ.V.; Hue, L.T.; Tri, D.Q. Researching and applying modeling software to forecast floods and saltwater intrusion in the Mekong River and display the results of saltwater forecasting on Google Earth. VN J. Hydrometeorol. 2020, 710, 33–42. https://doi.org/10.36335/VNJHM.2020(710).33-42.
12. University of Science and Vietnam Institute for Advanced Studies in Mathematics, develop a tool to assess the effects of saltwater intrusion on socio–economic and apply experimental properties to the Mekong Delta. J. Clim. Change Sci. 2021, 17(3), 21-29.
13. Tien, K.D.; Adam, L.; Micheal, D.Y. Perceptions and responses to rising salinity intrusion in the Mekong River Delta: What drives a long–term community–based strategy. Sci. Total Environ. 2020, 711, 134759.
14. Nguyen, H.Q.; Wyatt, A. Socio–ecological resilience of mangrove–shrimp models under various threats exacerbated from salinity intrusion in coastal area of the Vietnamese Mekong Delta. Int. J. Sustainable Dev. World Ecol. 2020, 27(7), 638–651.
15. Hai, T.X.; Van Nghi, V.; Hung, V.H.; Tuan, D.N.; Lam, D.T.; Van, C.T. Assessing and Forecasting Saline Intrusion in the Vietnamese Mekong Delta Under The Impact of Upstream Flow and Sea Level Rise. J. Environ. Sci. Eng. B, 2019, 8, 174.
16. Toan, T.Q. Climate Change and Sea Level Rise in the Mekong Delta: Flood, Tidal Inundation, Salinity Intrusion, and Irrigation Adaptation Methods. Coastal Disasters and Climate Change in Vietnam: Engineering and Planning Perspectives, 2014, 199–217.
17. Roehl Jr, E.A.; Daamen, R.C.; Cook, J.B. Estimating seawater intrusion impacts on coastal intakes as a result of climate change. J. AWWA 2013, 105(11), E642–E650. https://doi.org/10.5942/jawwa.2013.105.0131. 
18. Rohmer, J.; Brisset, N. Short–term forecasting of saltwater occurrence at La Comté River (French Guiana) using a kernel–based support vector machine. Environ. Earth Sci. 2017, 76, 246. https://doi.org/10.1007/s12665–017–6553–5.
19. Climate Change Adaptation Project for Sustainable Agriculture and Rural Development in the coastal provinces of the Mekong Delta in Vietnam. Southern Institute of Water Resources Planning, 2013.
20. Duyen, M.T.; Minh, N.M. Strengthen forecasting and warning of hydro–meteorological disasters in response to climate change, saline intrusion and sea level rise in the Mekong Delta. Environ. Magazine 2021, 4, 58–60. 
21. Apel, H., Khiem, M., Quan, N.H. and Toan, T.Q. Brief Communication: Seasonal Prediction of Salinity Intrusion in The Mekong Delta. Nat. Hazards Earth Syst. Sci. 2020, 20(6), 1609–1616.
22. Codiga, D. L. Unified tidal analysis and prediction using the UTid