ASTM D4104/D4104M
Standard Practice for (Analytical Procedures) Determining Transmissivity of Nonleaky Confined Aquifers by Overdamped Well Response to Instantaneous Change in Head (Slug Tests)
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About This Item
ASTM D4104/D4104M is a technical standard for determining transmissivity in nonleaky confined aquifers using overdamped well response to an instantaneous change in head, commonly known as slug tests. It provides a structured analytical approach for interpreting well response data, helping users evaluate aquifer performance with greater consistency. For groundwater investigations, this standard supports more reliable field analysis and clearer comparison of results across projects.
What is ASTM D4104/D4104M?
ASTM D4104/D4104M, titled Standard Practice for (Analytical Procedures) Determining Transmissivity of Nonleaky Confined Aquifers by Overdamped Well Response to Instantaneous Change in Head (Slug Tests), sets out an analytical practice for estimating transmissivity from a specific type of well test. The standard is focused on confined aquifers that are nonleaky and on interpreting the recovery or response of a well after a sudden head change. It is used as a technical reference for consistent analysis rather than as a general groundwater manual.
Where is ASTM D4104/D4104M used?
This standard is commonly used in groundwater testing and hydrogeologic fieldwork where confined aquifers are evaluated through slug tests. It is relevant when a well response to a quick head change must be analyzed using an accepted procedure. ASTM D4104/D4104M may be applied by consulting engineers, environmental specialists, and testing personnel who need a dependable analytical basis for interpreting transmissivity from field measurements. It is especially useful when project decisions depend on consistent aquifer test results.
Why is ASTM D4104/D4104M important?
ASTM D4104/D4104M matters because it helps standardize how transmissivity is determined from overdamped well response data. That consistency supports better comparison of results, more defensible reporting, and reduced uncertainty in groundwater evaluation. For procurement, compliance, and technical review, a recognized ASTM standard can also help align test methods across teams and projects. In practice, using ASTM D4104/D4104M can improve confidence in aquifer characterization and reduce the risk of inconsistent interpretation.
- Analytical procedures for slug test response
- Confined, nonleaky aquifer evaluation
- Transmissivity estimation from well data
- Overdamped head-response interpretation
- Groundwater field testing consistency
- Publication Date: 2020-12-17
- Publisher: ASTM
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