Hydraulic Conductivity / Darcy Flux implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-070

Effect

Computation or source lookup only

Input and validation requirements

Extreme finite inputs overflow the plain JavaScript arithmetic: multiplying 1e308 by 1e308 yields Infinity, so q and Q become -Infinity. The instrument should reject or flag this rather than present it as a finite physical result.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "K": 0.0001,
    "K_units": "m/s",
    "hydraulic_gradient": -0.02,
    "gradient_units": "dimensionless signed dh/dl",
    "area": 50,
    "area_units": "m^2"
  },
  "expected_outputs": {
    "q": 0.000002,
    "q_units": "m/s",
    "Q": 0.0001,
    "Q_units": "m^3/s"
  },
  "working": "q = -K·(dh/dl) = -(0.0001 m/s)·(-0.02) = 0.000002 m/s. Q = q·A = (0.000002 m/s)·(50 m^2) = 0.0001 m^3/s."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json