Resources
Articles, case study summaries, and technical notes on geophysics, GIS, and geotechnical engineering. We share our experience to help clients and peers make informed decisions.
Understanding Our Methods
Short technical notes that explain how we approach common problems—useful for clients who want to understand methodology before engaging us or for students and practitioners.
When to Use GPR vs. ERT for Subsurface Investigation
Ground Penetrating Radar (GPR) and Electrical Resistivity Tomography (ERT) are both non-destructive methods, but they suit different depths, resolutions, and ground conditions. GPR excels in shallow, dry, low-clay environments and is ideal for utilities and concrete. ERT works in deeper and more conductive settings and is preferred for groundwater, mineral exploration, and deep geotechnical characterisation. This note summarises selection criteria and typical depth ranges, with a simple decision flowchart for project planners.
SUE Quality Levels: What They Mean for Your Project
Subsurface Utility Engineering uses quality levels (QL-D through QL-A) to communicate the reliability of utility location data. QL-D is records-only; QL-C adds surface geophysics; QL-B designates horizontal position with potholing; QL-A adds vertical position. Choosing the right level for each phase of design and construction can reduce risk without over-spending. We outline when to specify each level and how we document and deliver the data.
MASW and Vs for Liquefaction Assessment: A Primer
Shear wave velocity (Vs) is a key input to liquefaction potential evaluation. Multichannel Analysis of Surface Waves (MASW) is an efficient way to obtain Vs profiles without boreholes. This note explains the basics of MASW acquisition and interpretation, how Vs is used in simplified liquefaction procedures, and the advantages of combining MASW with a limited number of boreholes for calibration.
Latest Articles
Periodic updates on projects, methods, and industry trends. For full case studies, visit our Projects page.
- April 16, 2026
- 9:14 am
Long Form Resources
In-depth guides and whitepapers for clients and partners. These documents are available on request or can be downloaded from our site when we publish them.
Guide to Geophysical Methods for Civil Engineers
A 20-page overview of GPR, ERT, and seismic methods for site investigation—when to use each, what to expect in terms of depth and resolution, and how to interpret reports. Aimed at project and design engineers who are new to geophysics.
Subsurface Utility Engineering Specification Template for Tenders
A template scope of work for Subsurface Utility Engineering that can be adapted for road, metro, or pipeline projects. Includes quality level definitions, deliverable list, and typical exclusions. Useful for clients preparing tender documents.
Best Practices for Borehole–Geophysics Integration
How to plan borehole locations using geophysics, correlate logs with inverted sections, and report integrated interpretations. Covers ERT, seismic, and GPR. Intended for geologists and geotechnical engineers planning site investigations.
Codes & Standards We Follow
Our work is carried out in accordance with relevant Indian and international standards. This list is indicative; specific project scope may reference additional codes.
| Domain | Standard / Code | Application |
|---|---|---|
| Geotechnical | IS 1892, IS 2720 (series), IS 2131, IS 2911 | Site investigation, soil testing, SPT, pile design |
| SUE | ASCE 38-02 | Quality levels and SUE process |
| Laboratory | NABL ISO/IEC 17025 | Accredited test methods |
| Highways | MoRTH/IRC guidelines | Road and bridge investigations |
| General | ISO 9001:2015 | Quality management system |
Need a specific Resource or Topic ?
If you are looking for information on a particular method, project type, or standard, get in touch. We can share relevant articles or arrange a technical discussion.