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D5737 – Standard Test Method Technical Guide
📏 Scope and Application of Well Discharge Methods
ASTM D5737/D5737M‑19, formally titled the Standard Guide for Methods for Measuring Well Discharge, provides a critical framework for the in‑situ determination of hydraulic properties of aquifer systems. This guide specifically covers methods for measuring discharge from pumping wells, injection wells, and other control wells. It is vital to note that this standard does not apply to borehole flow meters designed for measuring vertical or horizontal flow within a borehole.
The guide emphasizes that it does not prescribe a single fixed procedure. Instead, it provides an organized collection of information and options, relying heavily on the user’s professional education and judgment for application.
🔍 Technical Focus: This guide is an integral part of a series of standards for aquifer testing. As stated in Section 1.2, the methods described are intended for the measurement of well discharge, a common requirement for determining aquifer and well properties.
| 🟦 Standard Element | 📐 Defined Guideline |
|---|---|
| Document Designation | D5737/D5737M − 19 |
| Document Type | Standard Guide (offer of options) |
| Primary Subject | Methods for Measuring Well Discharge |
| System Excluded | Borehole flow meters (vertical/horizontal) |
| Professional Requirement | Must be used with judgment; not a standard of care |
⚡ Unit Systems and Measurement Precision
The standard is strict on unit conformance. Values are provided in SI units and inch‑pound units [presented in brackets]. Section 1.4 explicitly requires these systems to be used independently of each other to avoid non‑conformance, as the values are not exact equivalents.
Data quality assurance is enforced via Practice D6026. All observed and calculated values must adhere to the guidelines for significant digits and rounding outlined in that practice. The collection and calculation procedures in this guide are considered the industry standard.
| 🎯 Requirement | ⚡ Specification |
|---|---|
| Unit Reporting Rule | SI or Inch‑pound units (used independently) |
| Significant Figures Guide | Practice D6026 |
| Reporting Flexibility | Results in non‑SI units are still valid |
| User Responsibility | Safety, health, environment, and water disposal |
📌 Important Compliance Note: While the data procedures are standard, Section 1.6.1 notes that the number of significant digits retained may be adjusted based on material variation or project objectives. This standard does not define the significant digits required for final engineering analysis.
📖 Referenced Documents and Definitions
Standard D5737/D5737M‑19 formally incorporates ASTM D653, Terminology Relating to Soil, Rock, and Contained Fluids, for all key definitions. This ensures consistency in terminology across related standards used in determining hydraulic properties of aquifer systems.
❓ Frequently Asked Questions
🔍 What is the purpose of ASTM D5737/D5737M‑19?
It is a standard guide that offers an organized overview of methods for measuring well discharge. It serves the broader goal of defining procedures for the in‑situ determination of aquifer hydraulic properties.
💡 Does the standard dictate a specific measurement method?
No. Per Section 1.2, it describes different methods but does not establish a fixed procedure. The selection of a method must be made using professional judgment based on the specific project.
⚡ How must units be handled to comply with the standard?
Units are given in SI and inch‑pound systems. These systems must be regarded separately and used independently. Combining values from the two systems is considered non‑conformance.