3D Modelling of Subsurface Contaminants | IsoFind
IsoFind · Isotopic 3D Modelling

Anticipate contaminant migration
before it reaches your sensitive receptors.

IsoFind combines geochemistry, isotopic signatures and spatio-temporal simulation to predict where, when and at what concentration a pollutant will impact your environment.

  • Forecast of concentration peaks over time
  • Identification of transfer and storage zones
  • Uncertainty reduction through isotopic constraints

PFAS and pesticide tracing is available free of charge to everyone.

IsoFind isotopic 3D modelling - contamination plume
Free PFAS PFAS and pesticide tracing included without a licence, air-gap compatible
100% local your groundwater data never leaves your machine
temporal simulation
Optional isotopic data
Nexus Engine + ONNX
Contaminants
PFAS (free) Pesticides (free) Chlorinated solvents (TCE / PCE) Redox metals (Cr, As, Fe) Hydrocarbons (BTEX) Mining sites

Today, decisions are made
without visibility on how contamination evolves.

Classical investigation methods produce a snapshot of the situation at a given moment. They do not say where the pollutant will be tomorrow, nor when it will reach the downstream abstraction point.

Classical analyses produce a static snapshot A sampling campaign documents the current state. It produces no forecast of future evolution.
Classical transport models carry high uncertainty Without isotopic constraints on sources and processes, scenarios quickly diverge from field observations.
Decisions are reactive, often too late By the time the contaminant is detected at the abstraction point, remediation options are already limited and costly.
Risk zones and concentration peaks are poorly anticipated Without temporal projection, it is impossible to know whether the concentration at the sensitive receptor will exceed a regulatory threshold, or when.

Understanding a contamination is no longer enough. You need to anticipate its behaviour.

IsoFind isotopic 3D modelling - plume view with isotopic ratios IsoFind 3D modelling - speciation tooltip and plume information

A simulation constrained
by isotopic signatures.

Isotopic signatures are not merely a tracing tool. They constrain sources, processes and mixing, making simulation scenarios consistent with field reality.

01

Real constraints

Isotopic signatures (delta ¹³C, delta ³⁷Cl, delta D...) allow sources to be discriminated, mixtures to be quantified and active processes to be identified. Every simulation scenario is anchored in these measured observations.

02

Process modelling

IsoFind integrates the mechanisms of transport, transformation (biodegradation, oxidation, reduction, adsorption) and storage of contaminants. The Nexus engine propagates isotopic fractionations node by node as the pollutant migrates.

03

Projection over time

The system simulates the spatio-temporal evolution of the plume and generates actionable predictive scenarios: concentration/time curves at sensitive receptors, mapping of risk horizons, estimation of impact timelines.

The result is not merely a visualisation. It is a simulation consistent with field observations, where every parameter is anchored in a real isotopic measurement.

Directly actionable
answers.

Four types of information that the simulation produces and that classical methods cannot provide.

Propagation

Visualise the probable trajectories of the contaminant in the subsurface, identify preferential pathways and accumulation zones before abstraction points are affected.

Timeline

Identify when a sensitive receptor will be impacted: abstraction well, wetland, agricultural drain. Plan remediation or operation accordingly, with a quantified intervention window.

Intensity

Estimate expected concentrations at sensitive receptors and anticipate whether regulatory thresholds will be exceeded. Distinguish critical situations from manageable ones before they materialise in the field.

Critical zones

Detect active transfer zones and horizons where the contaminant preferentially accumulates. Target remediation actions on the sectors that genuinely contribute to the flux, not across the entire site.

Key output: concentration / time curves for each sensitive receptor, exportable for your reports and regulatory dossiers.
IsoFind 3D interface - volumetric view of the isotopic plume IsoFind 3D - speciation tooltip and isotopic ratios on click

Free navigation in the volume · horizontal cross-section · isotopic tooltip on click

A visual interface to understand
complex phenomena.

3D modelling does not merely simplify data reading. It makes predictions actionable by enabling navigation through the space and time of contamination.

Navigation through space and time Free rotation, zoom, Z cross-section and time slider allow exploration of the plume from every angle and at every stage of the simulation.
Identification of fluxes and accumulations The colour gradient and iso-contours instantly reveal high-concentration zones, active fronts and storage horizons.
Immediate reading of propagation dynamics A click on any point in the volume displays the local geochemical conditions, predicted isotopic ratio, degree of degradation and estimated mobility.
Volume displayable in concentration or isotopes Toggle between the concentration view and the delta ¹³C (or delta ³⁷Cl) view to see simultaneously where the pollutant is present and at what stage of degradation it has reached.
3D visualisation does not merely simplify reading, it makes predictions actionable.

Four contexts
where prediction changes everything.

Isotopically constrained spatio-temporal simulation answers questions that classical investigations cannot address.

Abstraction point protection

Anticipate the arrival of a contaminant at a drinking water borehole or agricultural well. Estimate the impact timeline and expected concentration to decide whether operation should be adjusted before detection.

Crisis management

Rapidly assess the impact of a leak or industrial incident. Simulate propagation scenarios in minutes to guide initial containment decisions and inform authorities.

Targeted remediation

Identify the zones that genuinely contribute to the contaminant flux rather than treating the entire site. Focus remediation resources on sectors with measurable high impact.

Environmental litigation

Demonstrate impacts deferred in time and space with a simulation grounded in measured data and published equations. Produce legally enforceable concentration/time curves for each sensitive receptor.

From measurement
to decision in a real case.

A representative example of the type of investigation that isotopically constrained simulation makes possible.

Context

PFAS contamination downstream of an industrial site, abstraction point 1.8 km away

Available data
12 piezometers with PFAS concentrations and compound-specific delta ¹³C measured over 3 campaigns
Hydraulic conductivity estimated from pumping tests (K = 4×10⁻⁵ m/s)
Hydraulic gradient measured (i = 0.003)
Identification of two sources by CSIA: ECF process (delta ¹³C = -28‰) and telomerisation (delta ¹³C = -21‰)
IsoFind results
Trajectory: contaminant front advancing along a NNE-SSW axis, converging towards the abstraction point
Impact timeline: estimated arrival at the abstraction point in 14 to 22 months depending on recharge scenarios
Estimated concentration: peak between 180 and 340 ng/L at the abstraction point, exceeding the regulatory threshold of 100 ng/L in both scenarios
Decision: installation of preventive upstream drainage and quarterly monitoring at alert points identified by the simulation

The simulation enabled a shift from a reactive posture (waiting for detection at the abstraction point) to a preventive one (intervention 14 months before impact), with an estimated remediation cost 4 times lower than post-contamination treatment.

Why this approach
is unique.

The combination of isotopy + spatio-temporal simulation does not exist in classical environmental investigation tools.

Isotopy + simulation integration

Hydrogeological modelling software ignores isotopes. Isotopic software does not simulate transport. IsoFind combines both in a unified workflow, without data export between tools.

Reduction of classical model uncertainties

Transport models without isotopic constraints have uncertainties that grow exponentially over time. Isotopic signatures reduce the space of possible scenarios and anchor the simulation in measured observations.

From analysis to prediction

Classical isotopy answers "where does this pollutant come from?". IsoFind answers "where will it be in 18 months and at what concentration?". This is a change of register, not an incremental improvement.

Usable by non-experts

The 3D interface, time slider and contextual tooltips allow a decision-maker, lawyer or site manager to understand and use the results without training in isotopic geochemistry.

Free access
for selected contaminants.

IsoFind provides isotopic tracing and 3D simulation for PFAS and pesticides free of charge, without a licence, without commitment.

Research · Free

PFAS and pesticides,
no conditions.

Full access to the simulation engine for PFAS and pesticide investigations: volumetric 3D reconstruction, temporal simulation, CSIA isotopic constraints and basic Nexus fractionations.

3D PFAS and pesticide simulation without a licence
Integrated CSIA constraints (delta ¹³C, delta ³⁷Cl)
Time slider, cross-section, PNG export
100% local, air-gap compatible, no data sent
Try for free
Pro · Coming soon

All contaminants,
the full engine.

Chlorinated solvents, redox metals, hydrocarbons, mining sites, with the ML ONNX engine, full Nexus fractionations and detailed speciation on click.

TCE / PCE, Cr(VI), As, BTEX, mining sites
Full Nexus engine: fractionations for all processes
Embedded ML ONNX: speciation, Kd, k_reaction on click
Integration into SHA-256 sealed PDF reports
Request a demonstration

Anticipate
rather than react.

Import your well data, define your sensitive receptors and get your first concentration/time curve in minutes. Free for PFAS and pesticides, no commitment.