Groundwater Exploration

Malaysia have 63.5 billion m3 groundwater storage (NAHRIM,2016). The groundwater storage (aquifers) can be classified into several categories which are aquifers in alluvial deposits, aquifers in limestone, aquifers in sedimentary or volcanic rocks and aquifers in igneous rocks. Generally, the aquifers can be in alluvial layers or hard rocks.

The demand for fresh water relatively increases from year to year. As the surface water always facing many problems like polluted with domestic waste, depleted during dry season, contaminated with  industrial waste and many others. Therefore, the groundwater is the best alternative for these problems.

Which Geophysical Method ?

Geophysical technique such as Electrical Resistivity Imaging (E.R.I) is widely used for groundwater exploration. In groundwater exploration, electrolytic conduction is the common mechanism where the current flow via the movement of ions in groundwater. For resistivity survey in the hard rocks like igneous and metamorphic rocks, the resistivity of these rocks greatly dependent on the degree of fracturing and the percentage of the fractures filled with groundwater.

Induced polarization (I.P) method could also assist resistivity result(s) in groundwater exploration. One of the mechanisms in I.P effect is membrane polarization effect which is largely caused by clay mineral present in the rock or sediment. Therefore, I.P technique can assist resistivity result in differentiate between clay and water zone.

How These Geophysical Techniques Could Help?

Electrical Resistivity Imaging (E.R.I) and Induced Polarization techniques will image the subsurface (ground) until certain depth. The product or result produced by these techniques are presented in coloured contour profile (see Example diagram). The profile showing the variations in term of resistivity and chargeability of the ground.

As our target is groundwater, groundwater will show low resistivity values compared to background values (in most cases). From here, our experienced geophysicist will interprets the aquifer zone and recommend the suitable location for tube well drilling and construction.

groundwater exploration
Resistivity Profile for Groundwater | The aquifer layer or water containing zone basically show low resistivity values compared to the background resistivity values.

Who Need This ?

  1. Tube Well Driller
  2. Tube Well Owner
  3. Agencies doing groundwater study
  4. Agencies doing tube well development
  5. Manufacturing industry players
  6. Groundwater engineer
  7. Hydrogeologist
  8. Agriculture industry players