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Colorado Basic Stormwater Calculations Program

Basic Stormwater Calculations Program Overview

This course provides basic hydrologic and hydraulic equations used in site design, beginning with a conceptual small suburban site and designing a bioretention basin to manage runoff.  

Intended Audience

  • Hydrology Engineers and Personnel 
  • Municipalities 
  • Engineers 
  • Contractors 
  • Consultants 
  • Non-regulatory 3rd Party Inspectors 
  • Civil Consultants/Students 
  • Environmental Consultants/Students 
  • Landowners, Permittees, and Construction Site Operators 

Curriculum: Intro to Basic Stormwater Calculations

This course consists of stormwater calculations associated with designing a bioretention basin for a suburban site. 

Topics include the following: 

  • Conceptual design using a bioretention case study 
  • Calculating total storm volume,  
  • Calculating basin storage,  
  • Determining peak flow rates,  
  • Pipe sizing, and  
  • Basic bioretention design. 

Learning Objectives

The main objective of this course is to provide you with an introduction to basic stormwater calculations associated with designing a bioretention basin for a suburban site. 

  • Demonstrate how to calculate total stormwater volume from a design storm (using the Simple Approach and the Curve Number Method). 
  • Describe peak flow rates and how to size for them (using the Rational Method and Manning’s Equation).
  • List the basic considerations of bioretention sizing and design.  


At the Completion of This Program You Will Receive

1.5 PDHs

Resume' Enhancer (Available on the Credential Validation Page)

Highly Recommend for the Advanced or a Beginner

..the instructor was great. Easy to follow along. I had no experience in this field and was very nervous. Got to work at my own pace through the online courses which gave me confidence once I got to the virtual instruction. I recommend to everyone regardless if you are advanced or a beginner in the field.

Rating: 5.0 / 5.0

Kim H, Commercial Property Services
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