Webinar instructions will be emailed before the date of the webinar.

Please log into the webinar 15 – 30 minutes before start time.

Tuesday, March 28, 2023 | 9:00 am – 4:30 pm CDT (including a 30-min. break)


Understanding Open Channel Flow and Pipe Flow 

  • Understanding pipe flow 
  • Understanding open channel hydraulics 
    • Examining types of open channel flows 
    • Looking at examples of open channels 


Making Open Channel Calculations 

  • Channel shapes and varying flow 
  • Manning’s equation and open channels 
  • Uniform flow calculations 
  • Critical flow calculations 
  • Varied flow 


Evaluating Channel Shapes  

  • Evaluating the effect of channel shapes: 
  • Trapezoidal, parabolic  


Evaluating Channel Linings 

  • Smooth surfaces 
  • Uneven or rough surfaces 
  • Vegetated surfaces 


Designing Open Channels 

  • Low slope 
  • Steep slope 
  • Transitions  


Applications for Open Channels and Case Studies 

  • Stormwater management 
  • Drainage 
  • Stream flow


Webinar Instructions
All attendees must log-on through their own email – attendees may not watch together if they wish to earn continuing education credit. HalfMoon Education Inc. must be able to prove attendance if either the attendee or HalfMoon Education Inc. is audited.

Certificates of completion can be downloaded in PDF form upon passing a short quiz. A link to the quiz will be sent to each qualifying attendee immediately after the webinar. The certificate can be downloaded from the Results page of the quiz upon scoring 80% or higher.

Webinars are presented via GoToWebinar, an easy-to-use application that can be run on most systems and tablets. Instructions and login information will be provided in an email sent close to the date of the webinar. It is highly recommended that you download, install and test the application before the webinar begins by clicking on the link in the email.

GoToWebinar App requirements:
Windows 7 – 10 or Mac OSX Mavericks (10.9) – macOS Catalina (10.15)

Web Browser:
The two most recent version of the following browsers:
Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge
Internet Explorer v11 (or later) with Flash enabled

Internet connection: Minimum of 1Mbps       Hardware: 2GB RAM or more

For more information, visit the Support section at


6.5 PDHs 

Practicing Institute of Engineering 
6.5 PDHs 

Landscape Architects 
6.5 HSW CE Hours 

6.5 HSW PDHs 

6.5 PDHs* 

Floodplain Managers 


Continuing Education Credit Information
This webinar is open to the public and is designed to qualify for 6.5 PDHs for professional engineers in most states to whom this subject matter is professionally relevant. 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) and North Carolina (S-0130). 

This webinar has been evaluated for compliance with the NYS Mandatory Continuing Education requirements by the Practicing Institute of Engineering and has been approved for 6.5 PDHs in the fields of professional engineering, landscape architecture and geology. 

This webinar is designed to qualify for 6.5 HSW CE hours for landscape architects in most states. The Landscape Architecture Continuing Education System has approved this course for 6.5 HSW PDHs. Only full participation is reportable to the LA CES. 

This webinar is designed to qualify for 6.5 PDHs for professional geologists in New York and in states which do not require pre-approval of continuing education activities or sponsors. 

This webinar has been approved by the Association of State Floodplain Managers for 6.5 CECs for floodplain managers. 

Attendance will be monitored, and attendance certificates will be available after the webinar for those who attend the entire course and score a minimum 80% on the quiz that follows the course (multiple attempts allowed). 


On-Demand Credits
The above pre-approval(s) only apply to the live presentation. This course in an on-demand format may not be eligible for the same credits as the live presentation; please consult your licensing board(s) to ensure that a structured, asynchronous learning format is appropriate. The following pre-approvals may be available for the on-demand format upon request: 

6.5 HSW PDHs (LA CES) 



Chris Naidu

Water Resources Civil Engineer, Senior Project Manager at RESPEC

Chris Naidu has more than 10 years of experience in drainage and flood control projects throughout New Mexico. His experience includes preparation of drainage management plans (DMP), hydrologic analysis, hydraulic analysis of flood control structures, sediment transport, and scour analysis for unlined arroyos and bridge structures. Using modeling/analysis software, Mr. Naidu produces high quality hydrologic and hydraulic models. He has a proven record of preparing easy-to-understand reports and corresponding maps and figures. He has prepared hydrographs and analyzed storm drains, weirs, pump stations, and detention/surge ponds. Additional skills include preparation of plan specifications, bidding and construction plans, cost estimates, and bidding services. He is familiar with Arc Geographic Information System (ArcGIS); Hydrologic Engineering Center (HEC) Hydrologic Modeling System, HEC Geospatial Hydrologic Modeling Extension (geoHMS0), HEC River Analysis System(HEC-RAS), US Environmental Protection Agency Storm Water Management Model (EPA SWMM), StormCad, and CulvertMaster.