ASTM D5855/D5855M
Standard Practice for (Analytical Procedure) Determining Transmissivity and Storage Coefficient of Confined Nonleaky or Leaky Aquifer by Constant Drawdown Method in Flowing Well
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About This Item
ASTM D5855/D5855M is the ASTM standard for an analytical procedure used to determine transmissivity and storage coefficient of a confined nonleaky or leaky aquifer by the constant drawdown method in a flowing well. It provides a structured approach for evaluating aquifer response under controlled conditions, helping support more consistent groundwater testing and interpretation. For projects that depend on reliable subsurface data, this standard can help improve technical confidence in hydraulic property estimates and related engineering decisions.
Overview of ASTM D5855/D5855M
This standard focuses on an analytical method for assessing transmissivity and storage coefficient from constant drawdown observations in a flowing well. ASTM D5855/D5855M is relevant when a confined aquifer may behave as nonleaky or leaky, and the test data need to be interpreted using a recognized procedure. The document is useful as a technical reference for comparing results, supporting consistent analysis, and reducing uncertainty when working with aquifer characterization data.
Common use cases of ASTM D5855/D5855M
ASTM D5855/D5855M is commonly used in groundwater testing programs where flowing wells are evaluated to estimate aquifer properties. It is applicable during hydrogeologic investigations, water resource studies, and field assessments that require interpretation of constant drawdown measurements. The standard is also useful for engineers and environmental professionals who need a consistent analytical procedure for confined aquifer systems, especially when comparing test results across sites or projects.
Benefits of using ASTM D5855/D5855M
Using ASTM D5855/D5855M helps promote consistency in the analysis of aquifer test data and supports better alignment between field measurements and reported hydraulic properties. It can aid compliance with established testing practices, improve comparability between investigations, and reduce ambiguity in transmissivity and storage coefficient evaluation. For procurement, consulting, and technical review, the standard offers a clear reference point that supports quality control and more defensible groundwater-related decisions.
- Constant drawdown analytical procedure
- Confined aquifer evaluation
- Nonleaky or leaky system context
- Flowing well test interpretation
- Transmissivity and storage coefficient estimates
- Publication Date: 2020-12-17
- Publisher: ASTM
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