Explore groundwater resources in Vietnam

In the world, the problem of groundwater pollution was concerned in the first year of the 80s of the 20th century with studies on the concentration of heavy metals in groundwater, especially As. The deltas with a large population density in South and Southeast Asia often distribute rich aquifers and are widely distributed.

Groundwater sources almost do not contain algae, one of the causes of water pollution. The components of concern in groundwater are dissolved impurities influenced by stratigraphic conditions, weather, rain, weather, weathering and biochemical processes in the area. In areas with good weathering conditions, with a lot of dirt and heavy rainfall, groundwater quality is easily polluted by dissolved minerals, organic matter, and humus for a long time following rainwater infiltration into the soil.

Groundwater comes from rainwater, surface water and water vapor in the air condenses and leaches into the ground.

The quality of groundwater depends on the mineralization composition and the stratigraphic structure that the water seeps through. Therefore, water flowing through the sand and granite strata is usually acidic and contains little minerals. When groundwater flows through limestone stratigraphy, the water usually has quite high hydrocarbonate hardness and alkalinity.

In addition, groundwater also has common characteristics:

- Low turbidity.

- The temperature and chemical composition are relatively stable.

- Does not have oxygen but can contain a lot of gases such as: CO2, H2S, ...

Contains many dissolved minerals mainly: Fe, Mn, Ca, Mg, ...

- In absence of microorganisms.

- Small residue content.

The difference between groundwater and surface water