FE Civil Exam Prep 51, Open Channel Flow — Manning's Equation

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - That Manning's equation has two forms; the 1.49 constant must only be used for US Customary units, while SI units use a constant of 1.0. - How to correctly calculate the hydraulic radius (R) as the flow area (A) divided by the wetted perimeter (P), ensuring not to include the top water surface in the perimeter. - To anticipate exam questions that require rearranging Manning's equation, often combined with Q = VA, to solve for variables like slope (S) or normal depth (y). - That the Manning's roughness coefficient (n) is an empirical value based on channel material that will be provided or found in a table in the NCEES handbook. - The critical difference between normal depth (calculated with Manning's equation for uniform flow) and critical depth (related to minimum specific energy and Froude number = 1), a common source of confusion on the exam. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep