Hydrogeological studies are essential for understanding groundwater resources, identifying potential water sources, and assessing the quality and quantity of available water.
Groundwater geophysics focuses on locating aquifers, characterizing hydrogeological parameters, and supporting sustainable water supply.
Key Applications
A. Aquifer Mapping & Delineation
- Identifying freshwater-bearing zones
- Determining aquifer depth, thickness, and geometry
- Mapping confined vs. unconfined aquifers
B. Borehole Siting & Drilling Optimization
- Selecting optimal well locations
- Reducing dry-hole risk
- Targeting high-permeability zones
C. Groundwater Quality Assessment
- Mapping salinity boundaries
- Detection of seawater intrusion
- Monitoring pollution migration
D. Hydrogeological Modeling Inputs
- Resistivity-hydraulic conductivity calibration
- Fracture mapping for hard-rock aquifers
- Recharge estimation using geophysical signatures
Geophysical Methods Commonly Used
- ERT / VES (Schlumberger) — Aquifer depth, salinity, lithology
- EM Surveys — Rapid mapping of freshwater/saline boundaries
- Magnetotellurics (MT / AMT) — Deep aquifers and regional hydrology
- Seismic Refraction / MASW — Depth to bedrock, fracture zones
- Borehole Logging — Resistivity, SP, gamma, flowmeter
Deliverables
- Aquifer property maps
- Optimal well location selection
- Recharge zone identification
- Hydrogeophysical interpretation report