Standard Practice for Depth Measurement of Surface Water
5.1 This is a general practice intended to give direction in the selection of depth measuring procedures and equipment for use under a wide range of conditions encountered in surface water bodies. Physical conditions at the measuring site, the quality of data required, and the availability of appropriate measuring equipment govern the selection process. A step-by-step procedure for actually obtaining a depth measurement is not discussed. This practice is to be used in conjunction with a practice on positioning techniques and another practice on bathymetric survey procedures to obtain horizontal location and bottom elevations of points on a water body.
1.1 This practice guides the user in selection of procedures commonly used to measure depth in water bodies that are as follows:
Procedure A—Manual Measurement
6 through 11
Procedure B—Electronic Sonic-Echo Sounding
12 through 13
Procedure C—Electronic Nonacoustic Measurement
14 through 15
The text specifies depth measuring terminology, describes measurement of depth by manual and electronic equipment, outlines specific uses of electronic sounders, and describes an electronic procedure for depth measurement other than using sonar.
1.2 The references cited and listed at the end of this practice contain information that may help in the design of a high quality measurement program.
1.3 The information provided on depth measurement is descriptive in nature and not intended to endorse any particular item of manufactured equipment or procedure.
1.4 This practice pertains to depth measurement in quiescent or low-velocity flow. For depth measurement related to stream gaging see Test Method D3858. For depth measurements related to reservoir surveys see Guide D4581.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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