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Ambiguities in implementing regulations for sustainable groundwater resources development in Vietnam with a case study of Tra Vinh province in Mekong Delta

Journal of hydrology. Regional studies, 2023-12, Vol.50, p.101572, Article 101572 [Peer Reviewed Journal]

2023 The Authors ;ISSN: 2214-5818 ;EISSN: 2214-5818 ;DOI: 10.1016/j.ejrh.2023.101572

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  • Title:
    Ambiguities in implementing regulations for sustainable groundwater resources development in Vietnam with a case study of Tra Vinh province in Mekong Delta
  • Author: Phan, Thang Long ; Zhou, Yangxiao ; Stigter, Tibor ; Bui Tran, Vuong ; Dang Van, Tuc ; Pham Van, Tuan ; Dao Hong, Hai
  • Subjects: Ambiguities and amendments ; Groundwater sustainability ; Tra Vinh case study ; Vietnamese regulation
  • Is Part Of: Journal of hydrology. Regional studies, 2023-12, Vol.50, p.101572, Article 101572
  • Description: The study region is the coastal Tra Vinh province located in Mekong Delta, Vietnam The study aims to clarify the ambiguities in implementing Vietnam's regulation on restrictions of groundwater abstraction in Mekong Delta. Three ambiguities were identified, namely, how should half of the saturated thickness of the unconfined aquifer be computed; is the water level depth of 30 m for the confined aquifer sufficient to prevent seawater intrusion and land subsidence; and why is the interference of water use rights of neighbouring provinces not considered. Numerical groundwater flow, saltwater transport and land subsidence were constructed for Tra Vinh province to assess water level requirements from Vietnam regulation and important constraints for groundwater sustainability. The model results show that although all scenarios satisfy groundwater level requirements from the Vietnam regulation, only the mitigation scenario combined with reducing abstraction and increasing recharge can lead to sustainable development. The current groundwater abstraction in Tra Vinh province has caused groundwater storage depletion and induced seawater intrusion, land subsidence, and captured groundwater inflow from neighbouring provinces. When the business as usual continues, seawater may intrude 4–5 km inland and cumulative land subsidence may reach 1.5 m by 2100. Reduction of current abstraction by 50% supplemented with the increase of recharge by 1.5 times in the dunes can lead to sustainable development. [Display omitted] •Ambiguities in implementing Vietnam regulations hinder sustainability assessments.•These ambiguities are identified and amendments are made.•Shortcomings of these ambiguities are illustrated in a case of the Tra Vinh province.
  • Publisher: Elsevier B.V
  • Language: English
  • Identifier: ISSN: 2214-5818
    EISSN: 2214-5818
    DOI: 10.1016/j.ejrh.2023.101572
  • Source: DOAJ Directory of Open Access Journals
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