Introduction: Groundwater exploration is the investigation of underground formations to understand the hydrologic cycle, know the groundwater quality, and identify the nature, number, and type of aquifers. A surface geophysical method is one of the groundwater investigation methods.
The use of geophysics for both groundwater resource mapping and water quality evaluations has increased over the years in large part due to the rapid advances in microprocessors and associated numerical modeling solutions.
Procedure: To locate groundwater accurately and to determine the depth of water several techniques must be used. As a first step geologic maps and cross sections showing the distribution and positions of the different kinds of rocks, both on the surface and underground are reviewed.
Types of Geotechnical Survey:
- Electrical Resistivity Survey
- Seismic Survey
- Seismic-electric Survey
- Ground Penetrating Radar
Objectives
- To investigate the aquifer characteristics, thickness, layer-wise soil type, groundwater quality (by conductivity value), and water table depth using the Vertical Electrical Sounding (VES) resistivity survey technique.
- To determine the geoelectric and hydrogeologic characteristics of the aquifer present in the study area.
- Detecting and mapping water-saturated layers in various types of shallow as well as deep aquifers as part of a comprehensive hydrotechnical investigation in Liberia.
Senan Resources
Senan has a wide range of VES tools and equipment, including GER Detect for Ground Water Detector, to carry out the groundwater survey. We have a qualified team, and a great resource to carry out successful geological surveys for all our clients.
Why Choose Senan for Geotechnical Investigations?
At Senan Resources, we blend expertise with innovation:
- Advanced Tools – We use equipment like the GER Detect Ground Water Locator, ensuring precision and depth.
- Qualified Technicians – Our team of geologists and field engineers are trained in both theory and practice.
- High Success Rate – We have a proven track record of accurate groundwater location in complex terrains.
- Customized Reporting – Clients receive clear, site-specific data that informs drilling and water resource management.
Frequently Asked Questions (FAQs)
What do I need to understand about geotechnical investigation before starting a groundwater project?
We view geotechnical investigation as a necessary first step in understanding subsurface conditions. It gives us the data we need to make smart, safe, and sustainable decisions about where and how to drill for groundwater.
Why is it important to study the soil and rock layers before drilling?
We analyze these layers to determine how they hold or transmit water. Some materials allow groundwater to flow freely, while others block it. This knowledge helps us predict yield and avoid drilling in low-potential areas.
What is a geotechnical investigation, and why is it done?
A geotechnical investigation checks what’s underground before the building starts. It helps figure out soil strength, how deep foundations should go, and what kind of support a structure will need.
How do geophysical methods help reduce the risks of unsuccessful drilling?
We use resistivity and seismic techniques to locate the most promising groundwater zones. This significantly reduces the chances of drilling in dry or low-yield spots, saving time and resources.
What benefits can I expect from having a proper geotechnical survey done?
By conducting a geotechnical survey, we’re able to guide drilling with precision. That means more reliable water access, reduced drilling failures, and better long-term planning for water use.
How does a Vertical Electrical Sounding (VES) survey contribute to groundwater detection?
We use VES to measure how electrical current moves through the ground. Changes in resistivity help us identify where water-saturated zones are and how deep they go — essential for determining viable drilling points.
What factors influence the reliability of a groundwater investigation?
We rely on multiple data points, accurate instruments, and the experience of our field team. Consistency in our process and careful interpretation ensure that our findings are dependable for groundwater development.
Let’s Build a Better Water Future Together
Contact us today to discover how our expertise can support your water needs—from concept to completion.