Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.

Sy

Specific yield (dimensionless).

Thickness

Saturated thickness in meters.

Ss

Specific storage in reciprocal meters.

Compute unconfined-aquifer storativity as specific yield plus the elastic storage term of saturated thickness times specific storage. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

S

Storativity (dimensionless).

• Aquifer calculations assume a geometry, boundary condition, flow regime, hydraulic properties, well construction, and observation response. Heterogeneity, anisotropy, leakage, storage, partial penetration, recharge, and pumping history can invalidate simple analytical solutions.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.

• Storativity Confined Calculator

  Compute confined-aquifer storativity as saturated thickness in meters times specific storage in reciprocal meters.

• Transmissivity Calculator

  Compute aquifer transmissivity in square meters per second as hydraulic conductivity times saturated aquifer thickness.

• Casing Collapse Pressure Calculator

  Compute the thin-wall external collapse resistance of casing from yield strength, outside diameter and wall thickness.