ASTM D4106

ASTM D4106 is a technical standard for an analytical procedure used to determine transmissivity and storage coefficient of nonleaky confined aquifers by the Theis nonequilibrium method. It helps provide a consistent approach for evaluating aquifer response from pumping or test data, supporting more reliable hydrogeologic interpretation. For groundwater studies and related engineering work, this standard offers a recognized framework for calculating key aquifer properties from field observations.

ASTM D4106 standard overview

ASTM D4106 focuses on an analytical procedure tied to the Theis nonequilibrium method, a classic approach for interpreting drawdown in confined aquifers. The standard is intended to guide calculation of transmissivity and storage coefficient when the aquifer is nonleaky and confined, using data from controlled testing conditions. As an ASTM standard, it supports consistent technical practice by defining a common basis for analysis, comparison, and reporting of results.

Where is ASTM D4106 used?

This standard is commonly used in groundwater investigations where confined aquifers are tested and analyzed from pumping or similar field data. It is relevant in hydrogeologic studies, water-supply evaluation, and subsurface engineering projects that depend on aquifer property estimates. ASTM D4106 is particularly useful when a project needs a standardized analytical method for interpreting test results and comparing transmissivity and storage coefficient values across sites or test programs.

Practical importance of ASTM D4106

ASTM D4106 matters because it helps reduce inconsistency in how aquifer test data are analyzed and reported. Using a recognized procedure can improve confidence in the resulting transmissivity and storage coefficient values, which are important for design decisions, resource evaluation, and risk management. It also supports better communication between consultants, owners, and regulators by providing a shared technical reference for groundwater testing and interpretation.

• Theis nonequilibrium analysis
• Confined aquifer testing
• Transmissivity determination
• Storage coefficient evaluation
• Field data interpretation