Groundwater Tracer Testing via Membrane Injection

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Solution Overview

Problem

Conducting tracer studies in groundwater systems poses challenges in developing effective sampling and monitoring plans to detect the tracer downgradient of the injection area, requiring an understanding of groundwater flow direction and velocity, as well as subsurface conditions.

Innovation Solution

A system is configured to perform contaminant testing of groundwater wells using a tracer solution by adding it to a water system without releasing it into the surrounding environment during testing, then removing and measuring the tracer solution to compare with predicted concentrations determined by a model.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If tracer solution is released into the surrounding environment during testing, then the tracer can be detected downgradient, but the tracer may be lost to volatilization and the surrounding environment

Engineering Contradiction:

Improvetracer detection accuracyVSAvoidtracer solution loss

Core Design Contradiction:

Measurement precisionVSLoss of substance

Solution Approach 1:

The patent extracts the tracer solution from direct environmental release by using a contained delivery system. The tracer is injected through a membrane barrier into the groundwater aquifer, preventing volatilization into the atmosphere while ensuring the tracer reaches the target downgradient location for detection.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a membrane barrier as an intermediary between the tracer injection point and the groundwater environment. This membrane allows controlled transfer of the tracer solution into the aquifer while preventing direct atmospheric contact, thus eliminating volatilization losses and protecting the surrounding environment.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If traditional bubbling method is used to add tracer solution, then the tracer can be introduced into the water system, but the tracer is subject to volatilization into the environment

Engineering Contradiction:

Improvetracer injection simplicityVSAvoidenvironmental pollution

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The patent converts the potential harm of tracer volatilization into a benefit by using the membrane barrier to redirect the tracer pathway. Instead of allowing harmful atmospheric release, the system channels the tracer through the membrane into the groundwater, transforming a pollution risk into an effective containment strategy.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent creates an inert environmental condition by using the membrane barrier to isolate the tracer injection process from the atmospheric environment. This prevents interaction between the tracer solution and atmospheric conditions that would cause volatilization, effectively creating a controlled non-reactive environment for tracer delivery.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

3Adaptability or versatility

If groundwater flow model is not used to guide monitoring design, then the testing process can proceed without preliminary planning, but the tracer detection downgradient becomes challenging

Engineering Contradiction:

Improvetesting process flexibilityVSAvoidtracer detection capability

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies preliminary action by using groundwater flow models to guide monitoring design before the actual tracer testing begins. The model predicts tracer transport pathways and concentrations, allowing optimization of monitoring well locations and sampling strategies in advance, ensuring accurate downgradient detection when the tracer is introduced.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach allows for accurate measurement of contaminants in water by comparing measured tracer concentrations with predicted values, enabling updates to groundwater flow models for improved accuracy and contaminant detection.

Implementation Method 1

developing a sampling and monitoring plan that allows the tracer to be detected downgradient of the injection area... understanding of groundwater flow direction and velocity

Methodology Applied

Scientific EffectAdvection: Advection

Implementation Method 2

The prediction of the concentration amount (or dilution amount) may be determined by a model that predicts the tracer solution that remains in the water system after a certain time or distance from the injection site

Methodology Applied

Scientific EffectDilution:

Data Source

PatentUS20250154864A1Tracer testing systems and methods

Publication Date: 2025.05.15 GEOSCI SUPPORT SERVICES

AI summary

Systems and methods may initiate the testing process to measure contaminants in the water, for example, by adding the tracer solution (e.g., as a gas) to a water system absent releasing the tracer solution into the surrounding environment during the testing process, then removing the tracer solution to a container after the testing process is complete. The amount of tracer solution that remains in the water system can be compared with a predicted concentration value determined by a model. In some examples, an action may be initiated based on the difference between the measured value and the predicted value.