Groundwater Exploration & Geophysical Investigation

Every successful borewell starts with understanding the ground beneath the project. Our groundwater exploration and geophysical investigation services help identify comparatively favourable groundwater zones before drilling begins – reducing uncertainty, cost and the risk of unproductive bores.

Groundwater conditions can vary significantly from one location to another. Geological formations, weathered zones, fractures, aquifer characteristics, depth and recharge conditions all influence the outcome of a drilling project. A scientific survey gives the project team a clearer picture of these conditions and supports better decisions on where – and how deep – to drill.

How our survey works

Desk study & site planning – where a site has no drilling history, it is first located on the 1:50,000 scale topographic sheet and the physical terrain is reviewed; a site visit is made where required.
Field data acquisition – electrodes and instruments are deployed along survey profiles using the Schlumberger array or another electrode configuration suited to the terrain.
Interpretation – every formation has its own electrical resistance. Field readings are processed with interpretation software to infer the type of formations, weathered and fractured zones and potential water-bearing layers – typically to depths of up to about 1,500 ft.
Recommendation – we identify suitable drilling points and indicate the expected formations, likely depth range and the type of rig best suited to the ground.

Aqua-Resist (ERT) Survey

Electrical Resistivity Tomography and vertical electrical sounding to image resistivity variation with depth and locate aquifer and fractured zones.

Aqua-Seis (Seismic) Survey

Seismic refraction / reflection profiling to understand layer boundaries, depth to bedrock and weathered-rock thickness.

Aqua-TEM / TDEM Survey

Time-domain electromagnetic sounding for deeper investigation and for differentiating fresh and saline water-bearing formations.

Surface geophysical methods used by Hitech Drilling Engineers – ERT, seismic and TDEM surveys.

What you gain from a survey

Pinpoints comparatively favourable aquifer zones
Precise, site-specific drilling plan
Helps maximise well yield
Minimises drilling risk and unproductive bores
Guides selection of rig and drilling method
Supports sustainable groundwater management

Illustrative 2D resistivity (ERT) section – a low-resistivity zone indicates a potential water-bearing formation and guides the drilling point.

Geophysical investigation improves the understanding of subsurface conditions and the selection of drilling points. Actual groundwater availability and yield depend on local hydrogeology and can only be confirmed by drilling and testing.

Questions? You’re covered

A survey helps identify comparatively favourable groundwater zones and the likely formations at a site, so the drilling point, depth and methodology can be planned more accurately – reducing the risk of a dry or low-yield bore.

Depending on the method, electrode spread and site conditions, our resistivity surveys can infer formations to depths of up to about 1,500 ft.

Yes. Interpreted results are shared with recommended drilling points and observations on the expected formations, so the project team can take informed decisions.

Borewell Development Hydrogeological Assessment

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