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Rất tiếc, mục này chỉ tồn tại ở Tiếng Anh (Mỹ). For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language.

Managed aquifer recharge (MAR) pilot Vi Thanh - Results from CRMGG support to NAWAPI
Technical Report Hanover, January 2026

Three series of aquifer storage and recovery (ASR) experiments in two different aquifers (brackish and saline) were successfully carried out in the town of Vi Thanh, Hau Giang province. Gravity infiltration of highly treated surface water to confined aquifers was achieved at a flowrate of 3 L/s (160–200 m³/d) and was estimated to be feasible up to 850 m³/d.

Recovery efficiency was good for the brackish aquifer, but very poor for the saline aquifer. Air entrapment during recharge should be avoided. Clogging due to precipitation of iron hydroxides was still acceptable, but would require well rehabilitation during continued operation. Groundwater quality was improved by mixing with fresh recharge water, but dissolution of siderite and pyrite increased manganese and sulphate concentrations in both aquifers and arsenic in GK2.

The main obstacle was the availability of sufficient treatment capacity to supply enough high-quality recharge water.

It was demonstrated that ASR could be a cost-effective measure to improve water security and locally contribute to reducing the decline in groundwater levels and salinisation of groundwater resources.

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