ASTM D6391

ASTM D6391 is the ASTM standard for field measurement of hydraulic conductivity using borehole infiltration. It provides a practical framework for evaluating how water moves through subsurface materials under field conditions, which can be important for site characterization, design decisions, and performance assessment. By focusing on in-place measurement rather than purely laboratory testing, this standard helps support more realistic results for projects where groundwater movement and infiltration behavior matter.

What is ASTM D6391?

ASTM D6391, titled Standard Test Method for Field Measurement of Hydraulic Conductivity Using Borehole Infiltration, describes a test method for measuring hydraulic conductivity in the field through infiltration into a borehole. The standard is useful when practitioners need a site-specific indication of how readily water can pass through a soil or similar material. As a technical document, it supports consistent testing practices and helps users interpret hydraulic behavior under actual site conditions rather than relying only on indirect estimates.

Where is ASTM D6391 used?

This standard is commonly used in geotechnical and environmental field investigations where subsurface water movement must be understood for planning or evaluation. It may be applied during site characterization, drainage assessment, infiltration-related studies, or other workflows involving borehole-based field testing. ASTM D6391 is also relevant when comparing field conditions across locations, supporting engineering decisions, or documenting conductivity measurements for project records and technical review.

Why is ASTM D6391 important?

ASTM D6391 matters because field-based hydraulic conductivity measurements can provide more representative information for engineering and quality control decisions. Using a recognized ASTM standard helps promote consistency in how tests are performed and reported, which can improve comparability between sites and reduce uncertainty in evaluation. For procurement, compliance, and technical review, the standard offers a clear reference point for measuring and documenting borehole infiltration results in a repeatable way.

• Field measurement of hydraulic conductivity
• Borehole infiltration test method
• Site-specific subsurface evaluation
• Support for engineering and compliance records