Hydrographic Surveys - Manual Depth Measuring Techniques
Credits: 1 PDH
PDH Course Description:
Manual depth measurement techniques are used for many under water engineering and construction applications. These methods include use of hand lead lines, topographic level rods, 2-m GPS poles, and sounding poles. Manual methods are generally used where more efficient acoustic methods cannot provide adequate depth data or sufficient detail. Manual depth measurement techniques are simply a variation of conventional topographic survey methods. However, unlike land-based topographic surveys, the geophysical properties of the bottom are not always visible or consistent.Examples include: surveys of areas adjacent to piers, bulkheads, and offshore pile structures; near locks, dams, power plants, and river control structures subject to turbulence; detailed surveys of rock jetties and breakwaters; beach and dune profile surveys; surveys in shallow detention or retention ponds or water conservation pools; surveys in shallow wetland areas with thick bottom vegetation or mangrove; and surveys in areas where unconsolidated sediments are present.
Topics:
- General Scope and Applications
- Lead Line or Sounding Disk Measurement
- Line Marking, Lead Type and Dimensions
- Use of Mushroom Anchor, Sound Disk
- Calibration
- Use of Sounding Pole
- Operational Procedures
- Manual Depth Measurement Accuracy and Quality Control Criteria
To take this course:
1.) Enroll in Course: Click below to enroll:
(must be logged into your user account)
Download the Study Guide
3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.
Take the final exam
4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
NOTE: After the exam is completed, you will need to return to this page, in order to print (download) the certificate of completion.
Print the Certificate of Completion
Intended Audience: This course is intended for surveying and engineering professional whose job description may require a general knowledge of simple manual depth measuring procedures.
Publication Source: USACE
Print the Certificate of Completion
Intended Audience: This course is intended for surveying and engineering professional whose job description may require a general knowledge of simple manual depth measuring procedures.
Publication Source: USACE
Donald Parnell, PE