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Climatic Change

, Volume 66, Issue 1–2, pp 89–107 | Cite as

Sea Level Rise Affecting the Vietnamese Mekong Delta: Water Elevation in the Flood Season and Implications for Rice Production

  • Reiner Wassmann
  • Nguyen Xuan Hien
  • Chu Thai Hoanh
  • To Phuc Tuong
Article

Abstract

In this study, we assessed the impact of sea level rise, one of the most ascertained consequences of global climate change, for water levels in the Vietnamese Mekong Delta (VMD). We used a hydraulic model to compute water levels from August to November - when flooding is presently critical- under sea level rise scenarios of 20 cm (=Δ 20) and 45 cm (=Δ 45), respectively. The outputs show that the contour lines of water levels will be shifted up to 25 km (Δ 20) and 50 km (Δ 45) towards the sea due to higher sea levels. At the onset of the flood season (August), the average increment in water levels in the Delta is 14.1 cm (Δ 20) and 32.2 cm (Δ 45), respectively. At the peak of the flood season (October), high discharge from upstream attenuates the increment in water level, but average water level rise of 11.9 cm (Δ 20) and 27.4 cm (Δ 45), respectively, still imply a substantial aggravation of flooding problems in the VMD. GIS techniques were used to delineate areas with different levels of vulnerability, i.e., area with high (2.3 mio ha =60% of the VMD), medium (0.6 mio ha = 15%) and low (1 mio ha =25%) vulnerability due to sea level rise. Rice production will be affected through excessive flooding in the tidally inundated areas and longer flooding periods in the central part of the VMD. These adverse impacts could affect all three cropping seasons, Mua (main rainfed crop), Dong Xuan (Winter-Spring) and He Thu (Summer-Autumn) in the VMD unless preventive measures are taken.

Keywords

Water Level Rice Production Flood Season Hydraulic Model Water Level Rise 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. ADB (Asian Development Bank): 1994, Climate Change in Asia: Vietnam Country Report, Regional Study on Global Environmental Issues, Manila, p. 103.Google Scholar
  2. Ali, A.: 1996, 'Vulnerability of Bangladesh to Climate Change and Sea Level Rise through Tropical Cyclones and Storm Surges', Water Air Soil Poll. 92(1-2), 171-179.Google Scholar
  3. Delft Hydraulics: 1989, SAFLOW Manual-A Program to Calculate One-Dimensional Channel Flow Including Salinity, Delft Hydraulics, Delft, The Netherlands.Google Scholar
  4. Dong, T. D.: 2000, 'VRSAP Model and its Applications', in Al-soufi, R. W. (ed.), Proceedings of the Workshop on Hydrologic and Environmental Modelling in the Mekong Basin, Technical Support Division, Mekong River Commission, Phnom Penh, Cambodia, pp. 236-245.Google Scholar
  5. Duong L. T. and Cho, K.: 1994, 'Farm-Management and Farming Systems-Development in Vietnam', J. Faculty Agric. Kyushu Univ. 39, 1-8.Google Scholar
  6. Diepen, C. A. van, Wolf, J., Keulen, H. van, and Rappoldt, C.: 1989, 'Wofost: A Simulation Model of Crop Production', Soil Use Manage. 5, 16-24.Google Scholar
  7. ESSA, Stothert, Pegasus, Ward & Associates, and IEM: 1992, Water Control Project for the Quan Lo Phung Hiep Area, Mekong Delta, Vietnam: A Pre-Feasibility study, ESSA Environmental and Social System Analysts Ltd., Vancouver, B.C., Canada.Google Scholar
  8. Hashimoto, T. R.: 2001, Environmental Issues and Recent Infrastructure Development in the Mekong Delta: Review, Analysis and Recommendations with Particular Reference to Large-Scale Wa-ter Control Projects and the Development of Coastal Areas, Working Paper No. 4, Australian Mekong Resource Centre, University of Sydney, Australia.Google Scholar
  9. IPCC (Intergovernmental Panel on Climate Change): 1990, Houghton, J. T., Jenkins, G. J., and Ephraums, J. J. (eds.), Scientific Assessment of Climate Change, Report of Working Group I, Cambridge University Press, U.K., 365 pp.Google Scholar
  10. IPCC (Intergovernmental Panel on Climate Change): 2000, Emissions Scenarios 2000, Special Re-port of the Intergovernmental Panel on Climate Change, Cambridge University Press, U.K., 570 pp.Google Scholar
  11. IPCC (Intergovernmental Panel on Climate Change): 2001, Climate Change 2001: Impacts, Adap-tation and Vulnerability, IPCC Third Assessment Report-Working Group II, Cambridge University Press, Cambridge, U.K., 1000 pp.Google Scholar
  12. Khue, N. N.: 1986, Modelling of Tidal Propagation and Salinity Intrusion in the Mekong Main Es-tuarine System, Technical paper of Mekong Delta Sallinity Intruction Studies, Phase II, Mekong Secretariat, Bangkok, 51 pp.Google Scholar
  13. Khue, N. N.: 1991, The Vietnam River System and Plain Mathematical Model for Flow and Salt Concentration, Sub-Institute of Water Resources Planning and Management, Ministry of Water Resources, Ho Chi Minh City, Vietnam, 26 pp.Google Scholar
  14. KOICA (Korea Water Resources Corporation) and KARICO (Korea Agricultural and Rural In-frastructure Corporation): 2000, Flood Control Planning for Development of the Mekong Delta (Basinwide): Final Report, Volume 1, Main Report, Mekong River Commission, Phnom Penh, Cambodia.Google Scholar
  15. Minh, H. N. T. and Kawaguchi, T.: 2002. 'Overview of Rice Production System in the Mekong Delta-Vietnam', J. Faculty Agric. Kyushu Univ. 47, 221-231.Google Scholar
  16. Moya, T., Namuco, O. S., Ziska, L. H., and Olszyk, D.: 1998, 'Growth Dynamics and Genotypic Variation in Tropical, Field-Grown Paddy Rice (Oryza sativa L.) with Increasing Carbon Dioxide and Temperature', Global Change Biol. 4, 645-656.CrossRefGoogle Scholar
  17. NEDECO: 1991a, Surface Water Resources and Hydraulic Modeling, Working Paper No. 2, Mekong Delta Master Plan Project, State Planning Committee of Vietnam, World Bank, Mekong Secretariat and UNDP, Bangkok, 180 pp.Google Scholar
  18. NEDECO: 1991b, Surface Water Resources and Hydraulic Modelling, Mekong Delta Master Plan Project (VIE/87/031), Working Paper No. 1, Volume II: Appendices, State Planning Committee-Government of Vietnam, World Bank, Mekong Secretariat, United Nations Development Programme (UNDP), Bangkok, 300 pp.Google Scholar
  19. NEDECO: 1992, Thematic Study on Management of Water Resources. Volume 4: Hydraulic Mod-elling, Mekong Delta Master Plan Project (VIE/87/031), State Planning Committee-Government.SEA LEVEL RISE AFFECTING MEKONG DELTA 107 of Vietnam, World Bank, Mekong Secretariat, United Nations Development Programme (UNDP), Bangkok, 128 pp.Google Scholar
  20. NEDECO: 1993, Thematic Study on Management of Water Resources. Volume 2: Flood Control, Mekong Delta Master Plan Project (VIE/87/031), State Planning Committee-Government of Vietnam, World Bank, Mekong Secretariat, United Nations Development Programme (UNDP), Bangkok, 169 pp.Google Scholar
  21. Nicholls, R. J., Hoozemans, F. M. J., and Archand, M.: 1999, 'Increasing Flood Risk and Wetland Losses Due to Global Sea-Level Rise: Regional and Global Analyses', Global Environ. Change Policy Dimension 9, 69-87.Google Scholar
  22. Perez, R. T., Feir, R. B., Carandang, E., and Gonzalez, E. B.: 1996, 'Potential Impacts of Sea Level Rise on the Coastal Resources of Manila Bay: A Preliminary Vulnerability Assessment', Wat er Air Soil Pollut. 92(1-2), 137-147.Google Scholar
  23. Sanh, N. V., Xuan, V. T., and Phong, T. A.: 1998, 'History and Future of Farming Systems in the Mekong Delta', in Xuan, Vo-Tong and Matsui, Shigeo (eds.), Development of Farming Systems in the Mekong Delta of Vietnam, H. M. C. Publishing House, Ho Chi Minh City, Vietnam, pp. 17-80.Google Scholar
  24. SOGREAH: 1963, Modele mathematique du delta du Mekong. Volume IV-3, Exploitation du modele definitif, UNDP-UNESCO, Paris.Google Scholar
  25. Smith, J. B. and Lazo, J. K.: 2001, 'A Summary of Climate Change Impact Assessments from the U.S. Country Studies Program', Clim. Change 50(1-2), 1-29.CrossRefGoogle Scholar
  26. Tol, R. S. J., Fankhauser, S., and Smith, J. B.: 1998, 'The Scope for Adaptation to Climate Change: What Can We Learn from the Impact Literature?', Global Environ. Change Policy Dimension 8(2), 109-123.Google Scholar
  27. Tuong, N. T.: 2001, Sea Level Measurement and Sea Level Rise in Vietnam, PSMSL Report for Vietnam, Proudman Oceanographic Laboratory, Birkenhead, U.K.Google Scholar
  28. Warrick, R. A. and Ahmad, Q. K. (eds.): 1996, The Implications of Climate and Sea-Level Change for Bangladesh, Kluwer Academic Publishers, Dordrecht, Netherlands, 415 pp.Google Scholar
  29. Wassmann, R., Neue, H. U., Lantin, R. S., Makarim, K, Chareonsilp, N., Buendia, L. V., and Rennen-berg, H.: 2000b, 'Characterization of Methane Emissions from Rice Fields in Asia. 2. Differences among Irrigated, Rainfed and Deepwater Rice', Nutrient Cycling Agroecosystems 58, 13-22.CrossRefGoogle Scholar
  30. Xuan, V. T. and Matsui, S. (eds.): 1998, Development of Farming Systems in the Mekong Delta of Vietnam, HCMC Publishing House, Ho Chi Minh City, Vietnam.Google Scholar
  31. Zeidler, R. B.: 1997, 'Continental Shorelines: Climate Change and Integrated Coastal Management', Ocean Coastal Manage. 37(1), 41-62.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Reiner Wassmann
    • 1
  • Nguyen Xuan Hien
    • 2
  • Chu Thai Hoanh
    • 3
  • To Phuc Tuong
    • 4
  1. 1.Institute for Meteorology and Climate Research (IMK-IFU)Forschungszentrum KarlsruheGarmisch-PartenkirchenGermany
  2. 2.Sub-Institute for Water Resources Planning (SIWRP)Ho Chi Minh CityVietnam
  3. 3.International Water Management Institute (IWMI)ColomboSri Lanka
  4. 4.International Rice Research Institute (IRRI)Los BañosPhilippines

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