Online Courses

Discount Packages

Ethics, Laws and Rules

Live Webinars

Video Presentations

Interactive Courses

OH Timed & Monitored

Courses by Provider

Open Channel Hydraulics

Open Channel Hydraulics
Course Highlights

This online engineering PDH interactive presentation focuses on the basic nature of flow in open channels and common ways of classifying open channel flow (laminar or turbulent, steady state or unsteady state, uniform or non-uniform, and critical, subcritical or supercritical).  It presents several worked examples to gain practice in the use of the Manning equation for a variety of uniform open channel flow calculations. The presentation also presents the parameter “specific energy” and various calculations related to critical, subcritical and supercritical flow, including hydraulic jump calculations. It discusses the thirteen possible types of gradually varied non-uniform flow surface profiles. It illustrates the procedure and equations for step-wise calculation of gradually varied non-uniform surface profiles through the use of examples.

Flow of water may take place either as open channel flow or pressure flow. Pressure flow takes place in a closed conduit such as a pipe, and pressure is the primary driving force for the flow.  For open channel flow, on the other hand, the flowing liquid has a free surface that is at atmospheric pressure and the driving force is gravity.  Open channel flow takes place in natural channels like rivers and streams. It also occurs in manmade channels such as those used to transport wastewater or irrigation water and in circular sewers flowing partially full.

Many examples of open channel flow can be approximated as uniform flow allowing the use of the Manning equation for calculations. However, non-uniform flow calculations are needed in some open channel flow situations, in which the flow is clearly non-uniform.  The concepts of supercritical, subcritical and critical flow, along with calculations related to those three flow regimes are need for non-uniform open channel flow analysis and calculations.

This 1 PDH online interactive presentation is intended primarily for civil, hydraulic, highway, environmental, chemical, mechanical, and industrial engineers, who are interested in learning more about open channel hydraulics.

Learning Objectives

This continuing education interactive presentation is intended to provide you with the following specific knowledge and skills:

  • Understanding the difference between laminar and turbulent flow, steady state and unsteady state, as well as uniform and non-uniform open channel flow
  • Calculating the hydraulic radius for flow of specified depth in an open channel with specified cross-sectional shape and size
  • Calculating the Reynolds number for a specified open channel flow and determine whether the flow is laminar or turbulent flow
  • Determining a value for the Manning roughness coefficient for flow in manmade or natural channels using the example tables provided in this course
  • Using the Manning equation to calculate volumetric flow rate, average velocity, Manning roughness coefficient, or channel bottom slope, if given adequate information about a reach of an open channel
  • Using the Manning equation with an iterative procedure to calculate normal depth for a specified volumetric flow rate, channel bottom slope, channel shape and size, and Manning roughness coefficient for a reach of open channel flow
  • Performing calculations for full or partial full flow under gravity in a circular pipe
  • Determining the critical depth for a specified volumetric flow rate through a rectangular channel of specified bottom width
  • Determining the critical slope for a specified volumetric flow rate through an open channel of specified shape, size, and Manning roughness coefficient, with known critical depth
  • Determining whether a specified volumetric flow rate through an open channel of given shape and size with known depth of flow will be critical, subcritical or supercritical flow
  • Calculating the depth of flow after a hydraulic jump if given the depth of flow before the hydraulic jump, the volumetric flow rate and the shape and dimensions of the open channel.
  • Identifying which type of surface profile (e.g. M1, M2, M3, S1, S2, S3, etc.) is present in a specified gradually varied flow situation
  • Performing stepwise calculation of the surface profile for a specified gradually varied, non-uniform open channel flow
Course Document
For this course, you will need to go through the interactive presentation "Open Channel Hydraulics". To access the presentation, you will need to log in or register and purchase the course. Following the course purchase, please click on the link provided in your account to view the presentation. The duration of this presentation is approximately 51 minutes.
This particular course document is accessible only after purchase.

Course Quiz
Once you finish watching the PDH interactive presentation, you will be redirected to your account to take a multiple-choice quiz consisting of ten (10) questions to earn 1 PDH credits.
The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and access the video presentation, please click on: