Make Lagging Theory and transformation uncertainty testable.

A browser-computed normalized response showing how the drawdown-gradient lag (τ_s) exceeding the flux lag (τ_q) can produce an S-like transition.

Problem

Shows why Lagging Darcy Law differs from a visual time shift and how response shape can change before parameter transfer.

Use when

Use as a first explanation for collaborators, students, reviewers, or technical teams that need a concrete LDL calculation.

Scope

Simplified line-source teaching implementation without wellbore storage or skin; it is not calibrated for field analysis.

Evidence

The public demonstration uses a normalized Lin-Yeh special case.

An interactive constant-rate pumping-test example comparing a Classical Darcy response and a lag-aware response.

Problem

Shows when separated flux and gradient response lags can create early-time residual structure and timing shifts.

Use when

Use before a technical discussion about whether a pumping test needs lag-aware interpretation.

Scope

Calculation-backed teaching model that omits wellbore storage and finite well radius. Site-specific analysis is required before design use.

Evidence

The demonstration is available from the home page and the Lagging Theory page.

A qualitative screening tool for deciding whether lag-aware aquifer-test interpretation should be evaluated before informing engineering decisions.

Problem

Turns pumping duration, observation window, recovery duration, lag or drainage scale, boundary response, residual-structure severity, and decision type into a screening result.

Use when

Use when a team needs a quick decision about whether conventional interpretation is enough for a first screen.

Scope

Qualitative screening only; it does not perform quantitative aquifer-test inversion or site-specific engineering calculation.

Evidence

Available on the Decision Lab page.

MIT-licensed Python research tool for transformation-uncertainty intervals in thermal response test interpretation.

Problem

Converts apparent TRT estimates into uncertainty intervals, reliability classes, and geothermal design reference factors.

Use when

Use when TRT interpretation needs explicit transformation uncertainty before shallow-geothermal design transfer.

Scope

The public repository contains software, documentation, tests, a calibration table, and small examples. It does not include raw field data.

Evidence

Repository documentation is current as of 2026-06-20.

Mathematica notebook for evaluating drawdown values in a new stream-depletion solution.

Problem

Keeps an analytical well-hydraulics computation visible for readers who need to inspect older solution code.

Use when

Use for archival Mathematica evaluation of the linked stream-depletion solution.

Scope

Archival notebook; it is not maintained as an open-source release.

Evidence

Repository documentation is current as of 2026-06-20.

Python scripts for approximate Zech solutions under constant-rate and constant-head pumping in confined aquifers.

Problem

Provides earlier analytical-flow calculation scripts for confined-aquifer pumping cases.

Use when

Use for inspecting earlier approximate analytical-flow implementations.

Scope

Standalone scripts; they are not a maintained Python release or validated design calculator.

Evidence

Repository documentation is current as of 2026-06-20.

A structured review of whether data, aquifer-test interpretation models, uncertainty propagation, and decision variables support a groundwater action.

Problem

Connects analysis tools to project decisions while preserving the confidentiality of project datasets and the stated scope of public demonstrations.

Use when

Use when a consultant, industrial team, or agency needs a bounded pilot before a larger groundwater or subsurface-energy study.

Scope

Applied collaboration route; it is not open-source software and does not replace engineering judgment.

Evidence

Published service route on this website.