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Friday, February 19, 2021
8:30 am – 4:30 pm CST (incl. a 60-min. break)
Dr. William J. Rahmeyer
Understanding Open Channel Flow
Basic concepts of open channel flows
Uniform and normal flow
Steady and unsteady flow
Laminar and turbulent flow
Gradually varied flow definition
Examples of open channel flow
Design Fundamentals of Open Channel Flow
Application example of the energy equation
Channel shapes and properties
Manning’s Equation for normal depth
Specific energy diagram
Critical and normal depth
Calculating Froude number
Flow regimes of super and subcritical flow
Conservation of linear momentum
Flow Resistance in Open Channels
Rigid and alluvial (natural) boundaries
When Manning’s n is not constant
Cowan’s equation for additive resistance
Iterative solution of normal depths using Manning’s equation
HEC-RAS Sediment and its effect on resistance
Principles of Open Channel Flow Design
Classification of water surface profiles
Upstream and downstream control
Synthesis of composite profiles
Rapidly varied flow
Calculating flow depths in open channels (review)
Floods and storm runoff
Fluvial geomorphology and channel response
Stable Channel Design
Example of solving an open channel problem with diverging flows
Sedimentation, erosion, and deposition
Channel bank and bed protection
Hydraulic structures used in open channel flow
Culverts, flumes, weirs, and gates
Principles of open channel design
Example of designing a trapezoidal channel
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6.5 ASFPM CECs
Continuing Education Credit Information
This webinar offers 6.5 PDHs to professional engineers licensed in all states.
HalfMoon Education is an approved continuing education sponsor for engineers
in Florida (Provider No. 0004647), Indiana (License No. CE21700059), Maryland,
New Jersey (Approval No. 24GP00000700), North Carolina (S-0130), and North
Dakota. HalfMoon Education is deemed an approved continuing education
sponsor for New York engineers via its registration with the American Institute
of Architects Continuing Education System (Regulations of the Commissioner
§68.14(i)(2)). Other states do not preapprove continuing education providers or
The Association of State Floodplain Managers has approved this course for
6.5 CECs for floodplain Managers.
Completion certificates will be awarded to participants who complete this event,
respond to prompts, and earn a passing score (80%) on the quiz that follows the
presentation (multiple attempts allowed).
Dr. William J. Rahmeyer
Dr. William J. Rahmeyer is a professor of Civil and Environmental Engineering at Utah State University and the director of the Hydro Composite Modeling Laboratory. For almost eight years he served as the department head of Civil and Environmental Engineering at Utah State University. Mr. Rahmeyer also has a joint appointment as the senior professor of the Hydraulics and Fluid Mechanics program of the Utah Water Research Laboratory at Utah State University. In the past, he has served as the division head of Water Engineering, as the interim division head of both the Structures Division and the Transportation Division, and as the undergraduate curriculum division head. Mr. Rahmeyer is a fellow in the American Society of Civil Engineers. His professional engineering license is in the State of Colorado. He serves on committees for the American Society of Engineering Educators (ASEE), the American Society of Civil Engineers (ASCE), the International Association of Hydraulic Research (IAHR), the Association of State Dam Safety Officers (ASDSO), the Instrument Society of America (ISA), the American Water Works Association (AWWA), the International Erosion Control Association (IECA), and the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE).
Mr. Rahmeyer regularly attends and presents at the annual conferences of ASDSO, ASEE, ASCE, IAHR, ASCE National Department Heads, and the Transportation Research Board (TRB). In the past, he has been a member of the United States Committee on Large Dams (USCOLD) and the International Committee on Large Dams (ICOLD). Before joining Utah State University in 1986, he was a research professor at Colorado State University. Dr. Rahmeyer has conducted research, published, and taught courses in hydraulics, fluid mechanics, open channel flow, hydraulic structures, and sediment transport for almost 40 years.