Three-dimensional (3D) geological modelling: Applications for hydrogeology
Presented by: Andrew Pettingell-Ward
Produced by: IAH NSW
Date: Tuesday 09 June 2026
Time: 17:30 for an 18:00 start
Where: WSP Office – Level 27
Online: Teams Link
Abstract
Three-dimensional (3D) geological modelling transforms borehole logs, seismic profiles, and geophysical surveys into a continuous, interactive 3D digital twin of the Earth’s crust. Rather than relying on static, two-dimensional cross-sections, geoscientists use this technology to visualise complex fault networks, folded strata, and shifting rock layers with high spatial precision.
When applied to hydrogeology, 3D modelling serves as the foundational architecture for understanding groundwater flow and contamination distribution. By accurately mapping the geometry of aquifers and aquitards, the model translates purely geological structures into hydraulic zones. This allows hydrogeologists to pinpoint high-velocity flow pathways, locate optimal well placements, map contaminant plumes, and predict saltwater intrusion. Ultimately, these 3D frameworks can be fed directly into numerical groundwater models (like MODFLOW) to run predictive scenarios, making them indispensable for sustainable water resource management and environmental remediation.
Bio
Andrew Pettingell-Ward is a Principal Environmental Scientist with 15 years of experience across environmental management, contaminated land assessment and remediation, infrastructure, and government projects. His technical expertise spans the environmental behaviour of PFAS, 3D geospatial modelling and machine learning, including construction of 3D and 4D subsurface models of sedimentary, alluvial and metamorphic geological systems. Andrew specialises in conceptualising multi-aquifer groundwater systems, modelling catchment-level water tables, visualising soil and groundwater contamination, and estimating subsurface contaminant volumes using geostatistical methods.
