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Climate change impacts on groundwater resources in Mekong Delta under representative concentration pathways (RCPs) scenarios

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  • Shrestha, Sangam
  • Bach, Tran Viet
  • Pandey, Vishnu Prasad

Abstract

Groundwater is the essential resource for various uses and have a great economic importance especially in the areas like Mekong Delta, which is the home for some 18 million people and produces a half of Vietnam’s rice and contributes substantial part of the country’s gross domestic product (GDP). Sustainable use of the groundwater resource is threatened by its uncontrolled abstraction and climate change. This study assesses groundwater resources in Mekong Delta aquifer system in the context of climate change. A set of models are used for the purpose. Groundwater recharge and its spatial variation are estimated using WETSPASS model, groundwater level and storage are estimated using MODFLOW and future climatic conditions in the area are developed by downscaling the data of five General Circulation Models (GCMs) retrieved from CMIP5 data portal. Two representative concentration pathways (RCPs) scenarios (RCP4.5 and RCP8.5) are considered for projecting future conditions of groundwater resources. Results reveal that the future average annual temperature is projected to increase by 1.5°C and 4.9°C by the end of the 21st century under RCP4.5 and RCP8.5 scenarios, respectively. Future rainfall is projected to increase in wet season and decrease in dry season. Groundwater recharge is projected to decline in short-, medium-, and long-terms. As a result, groundwater levels and storage are also projected to decline in future. These findings may help decision-makers and stakeholders for devising sustainable groundwater management strategies in Mekong Delta.

Suggested Citation

  • Shrestha, Sangam & Bach, Tran Viet & Pandey, Vishnu Prasad, 2016. "Climate change impacts on groundwater resources in Mekong Delta under representative concentration pathways (RCPs) scenarios," Environmental Science & Policy, Elsevier, vol. 61(C), pages 1-13.
    • Handle: RePEc:eee:enscpo:v:61:y:2016:i:c:p:1-13
    DOI: 10.1016/j.envsci.2016.03.010
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    Cited by:

    1. Tran, Dung Duc & Huu, Loc Ho & Hoang, Long Phi & Pham, Tien Duy & Nguyen, Au Hai, 2021. "Sustainability of rice-based livelihoods in the upper floodplains of Vietnamese Mekong Delta: Prospects and challenges," Agricultural Water Management, Elsevier, vol. 243(C).
    2. Berchoux, Tristan & Hutton, Craig W. & Hensengerth, Oliver & Voepel, Hal E. & Tri, Van P.D. & Vu, Pham T. & Hung, Nghia N. & Parsons, Dan & Darby, Stephen E., 2023. "Effect of planning policies on land use dynamics and livelihood opportunities under global environmental change: Evidence from the Mekong Delta," Land Use Policy, Elsevier, vol. 131(C).
    3. Mimoun Boughriba & Abdelhakim Jilali, 2018. "Climate change and modeling of an unconfined aquifer: the Triffa plain, Morocco," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 20(5), pages 2009-2026, October.
    4. Ahmadzadeh, Hojat & Mansouri, Bahareh & Fathian, Farshad & Vaheddoost, Babak, 2022. "Assessment of water demand reliability using SWAT and RIBASIM models with respect to climate change and operational water projects," Agricultural Water Management, Elsevier, vol. 261(C).
    5. Akbari, Fatemeh & Shourian, Mojtaba & Moridi, Ali, 2022. "Assessment of the climate change impacts on the watershed-scale optimal crop pattern using a surface-groundwater interaction hydro-agronomic model," Agricultural Water Management, Elsevier, vol. 265(C).
    6. Kashif Haleem & Afed Ullah Khan & Jehanzeb Khan & Abdulnoor A. J. Ghanim & Ahmed M. Al-Areeq, 2023. "Evaluating Future Streamflow Patterns under SSP245 Scenarios: Insights from CMIP6," Sustainability, MDPI, vol. 15(22), pages 1-21, November.

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