ASTM D5073-21 PDF

Overview

ASTM D5073-21 - Standard Practice for Depth Measurement of Surface Water provides comprehensive guidance for selecting and applying effective depth measurement procedures in various surface water bodies. Developed by ASTM International, this standard supports practitioners in choosing appropriate equipment and methodologies for depth determination, addressing both manual and electronic measurement techniques. The guidance covers a broad range of field conditions, recognizes the importance of data quality, and underscores the significance of using the standard in conjunction with established positioning and bathymetric survey practices to ensure accurate bottom elevation and horizontal location determination.

Key Topics

• Manual Measurement Procedures: Includes methods such as sounding rods, sounding lines, sounding reels, and bar sweeps. Manual techniques are particularly useful for shallow, quiescent water, areas inaccessible to electronic equipment, locating obstacles, verifying electronic measurements, and aiding in bottom sampling for water quality analysis.
• Electronic Sonic-Echo Sounding: Describes the use of echo sounders for water depth determination by measuring the time interval for sound pulses to travel to and reflect back from the water bottom. It offers guidance on transducer frequency selection, recording and interpreting soundings, quality assurance, and common sources of error including sound velocity variations, wave action, and bottom conditions.
• Electronic Nonacoustic Measurement: Briefly outlines non-sonic electronic methods, such as ground-penetrating radar, for specific applications where acoustic equipment may be ineffective.
• Terminology & Definitions: Provides standardized vocabulary around depth measurement, including definitions for terms like sounding lines, bar-checks, transducer draft, sonar, and more, to promote consistency in surface water measurement.
• Limitations and Data Use: The practice focuses on general procedures rather than prescriptive methods, emphasizing selection rather than endorsement of any specific technology or brand. The standard is geared toward still or low-velocity water; for dynamic channels or reservoir surveys, related standards are recommended.
• Safety and Regulatory Considerations: Notes the user’s responsibility to address local safety, health, and environmental practices and comply with regulatory boundaries.

Applications

ASTM D5073-21 is widely applicable for organizations and professionals involved in hydrology, environmental monitoring, water resource management, and civil engineering. Typical uses include:

• Hydrographic and Bathymetric Surveys: Supporting the creation of accurate maps and profiles of lakes, reservoirs, and ponds.
• Navigation Safety Assessments: Locating submerged hazards and verifying navigational clearances in waterways.
• Environmental Monitoring: Gathering base data for sediment studies, aquatic habitat assessments, water quality projects, and ecosystem management.
• Construction and Engineering Projects: Determining site suitability and informing the design of structures such as bridges, dams, docks, or pipelines in or crossing bodies of water.
• Regulatory Compliance and Research: Providing data for reporting, regulatory submissions, and academic studies relating to surface water characteristics.

Related Standards

Utilizing ASTM D5073-21 often requires reference to additional standards for full project integration and enhanced accuracy:

• ASTM D3858: Open-Channel Flow Measurement of Water by Velocity-Area Method - pertinent for stream gauging and dynamic water bodies.
• ASTM D4581: Guide for Measurement of Morphologic Characteristics of Surface Water Bodies (Withdrawn, but still cited for reference).
• ASTM D4410: Terminology for Fluvial Sediment - for projects involving sediment-related measurements.
• ASTM D1129: Terminology Relating to Water - for standardized water-related terms and definitions.

By adhering to ASTM D5073-21, professionals can ensure standardized, reliable, and high-quality depth measurements across a variety of surface water contexts, supporting accurate data collection and effective decision-making in water resources and environmental management.