ASTM D5912

ASTM D5912 is the ASTM standard for an analytical procedure used to determine the hydraulic conductivity of an unconfined aquifer by observing overdamped well response to an instantaneous change in head, often called a slug test. It provides a structured way to interpret groundwater response in the field, helping users estimate how readily water moves through the aquifer. This makes the standard useful for hydrogeologic evaluation, project planning, and consistent technical documentation.

What is ASTM D5912?

This standard practice describes an analytical procedure for evaluating hydraulic conductivity in an unconfined aquifer from the response of a well to a sudden head change. In practical terms, it supports interpretation of slug-test data where the well response is overdamped, meaning the water level returns toward equilibrium without oscillation. ASTM D5912 is therefore a technical document for groundwater testing and analysis, offering a recognized approach for estimating aquifer behavior in a controlled and repeatable way.

Where is ASTM D5912 used?

ASTM D5912 is commonly used in hydrogeologic investigations where understanding aquifer permeability is important. It is relevant to field testing programs that involve monitoring wells, piezometers, and other groundwater observation systems. The standard is often applied during site characterization, remediation planning, and engineering studies that depend on reliable hydraulic conductivity data. Because it addresses an analytical interpretation method, it is especially useful when working with slug-test results from unconfined aquifers.

Why is ASTM D5912 important?

ASTM D5912 helps bring consistency to groundwater testing by defining a recognized method for interpreting overdamped well response data. That consistency supports more defensible results for compliance work, project comparisons, procurement decisions, and quality control in subsurface investigations. When hydraulic conductivity is estimated using a standard practice, teams can reduce ambiguity in analysis and improve confidence in the reported aquifer properties. For users, ASTM D5912 can be an important reference for reliable technical evaluation.

• Analytical interpretation of slug-test data
• Hydraulic conductivity estimation for unconfined aquifers
• Overdamped well response to instantaneous head change
• Groundwater field testing and data analysis
• Technical reference for consistent aquifer evaluation