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Intensified salinity intrusion in coastal aquifers due to groundwater overextraction: a case study in the Mekong Delta, Vietnam

Environmental science and pollution research international, 2022-02, Vol.29 (6), p.8996-9010 [Peer Reviewed Journal]

The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021 ;2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. ;The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021. ;ISSN: 0944-1344 ;EISSN: 1614-7499 ;DOI: 10.1007/s11356-021-16282-3 ;PMID: 34498189

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Title:
Intensified salinity intrusion in coastal aquifers due to groundwater overextraction: a case study in the Mekong Delta, Vietnam
Author: Tran, Dang An ; Tsujimura, Maki ; Pham, Hai V. ; Nguyen, Tam V. ; Ho, Loc Huu ; Le Vo, Phu ; Ha, Khai Quang ; Dang, Thanh Duc ; Van Binh, Doan ; Doan, Quang-Van
Subjects: Aquatic Pollution ; Aquifers ; Atmospheric Protection/Air Quality Control/Air Pollution ; Calibration ; Coastal aquifers ; Coastal waters ; Depletion ; Earth and Environmental Science ; Ecotoxicology ; Environment ; Environmental Chemistry ; Environmental Health ; Exploitation ; Groundwater ; Groundwater depletion ; Groundwater flow ; Groundwater levels ; Groundwater movement ; Groundwater supply ; Health problems ; Humans ; Intrusion ; Prediction models ; Pumping rates ; Research Article ; Salinity ; Salinity effects ; Salinization ; Solute transport ; Vietnam ; Waste Water Technology ; Water conveyance ; Water flow ; Water levels ; Water Management ; Water Movements ; Water Pollution Control ; Water Supply ; Water supply systems
Is Part Of: Environmental science and pollution research international, 2022-02, Vol.29 (6), p.8996-9010
Description: Groundwater salinization is one of the most severe environmental problems in coastal aquifers worldwide, causing exceeding salinity in groundwater supply systems for many purposes. High salinity concentration in groundwater can be detected several kilometers inland and may result in an increased risk for coastal water supply systems and human health problems. This study investigates the impacts of groundwater pumping practices and regional groundwater flow dynamics on groundwater flow and salinity intrusion in the coastal aquifers of the Vietnamese Mekong Delta using the SEAWAT model—a variable-density groundwater flow and solute transport model. The model was constructed in three dimensions (3D) and accounted for multi-aquifers, variation of groundwater levels in neighboring areas, pumping, and paleo-salinity. Model calibration was carried for 13 years (2000 to 2012), and validation was conducted for 4 years (2013 to 2016). The best-calibrated model was used to develop prediction models for the next 14 years (2017 to 2030). Six future scenarios were introduced based on pumping rates and regional groundwater levels. Modeling results revealed that groundwater pumping activities and variation of regional groundwater flow systems strongly influence groundwater level depletion and saline movement from upper layers to lower layers. High salinity (>2.0 g/L) was expected to expand downward up to 150 m in depth and 2000 m toward surrounding areas in the next 14 years under increasing groundwater pumping capacity. A slight recovery in water level was also observed with decreasing groundwater exploitation. The reduction in the pumping rate from both local and regional scales will be necessary to recover groundwater levels and protect fresh aquifers from expanding paleo-saline in groundwater.
Publisher: Berlin/Heidelberg: Springer Berlin Heidelberg
Language: English
Identifier: ISSN: 0944-1344
EISSN: 1614-7499
DOI: 10.1007/s11356-021-16282-3
PMID: 34498189
Source: AUTh Library subscriptions: ProQuest Central
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Intensified salinity intrusion in coastal aquifers due to groundwater overextraction: a case study in the Mekong Delta, Vietnam

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