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Bioretention Modeling Done Right


Bioretention facilities typically consist of a depression filled with different layers of engineered soil media for water quality treatment purposes, surface ponding, and an overflow control structure. Some have an underdrain; some do not. Some allow infiltration to the native soil under the engineered soil media; some have a liner preventing infiltration.

Needless to say, bioretention facilities are complex, and this makes accurately modeling how water travels through the different engineered soil layers even more complicated. Since each soil layer has unique soil characteristics, these properties affect how fast the water travels down to the next layer and eventually out of the bioretention system through an underdrain, infiltration to the native soil, or both. Furthermore, this impacts how much stormwater runoff ponds on the surface and is available for overflow and discharge and how much runoff is treated.

So, given all this intricacy, what do you need to know about bioretention facilities and how do you most accurately model them?

Join Forester University and returning speaker Doug Beyerlein, P.E., P.H., D.WRE, for the updated-for-2019 version of this live, educational webinar as we dive into all things bioretention and filter the complexity out of bioretention modeling.

This course will discuss how bioretention systems are designed, how different engineered soil media impact the movement of stormwater runoff through the engineered soil layers, and how this is typically modeled. Modeling assumptions, good and bad, will be identified along with their potential impact on bioretention facility sizing and effectiveness in providing water quality treatment.

 Whether you are new to bioretention or already an experienced practitioner—and even if you have taken previous iterations of this ever-popular webinar—you will be sure to come away from this course having discovered something new about the many complexities of bioretention facilities and how to accurately model their intricate functions.

Learning Objectives
Attendees can expect the discussion and education of the following learning objectives.

  • Discover how bioretention facilities work
  • Learn how bioretention facilities are designed
  • Determine the critical factors in accurately modeling the movement of stormwater runoff through a bioretention facility
  • Identify the potential impacts of modeling assumptions on bioretention facility sizing and effectiveness in providing water quality treatment

Train Your Team
Get the whole team trained! We offer additional savings if you register as a group. For group pricing information, contact us at

* Presentations are scheduled for approximately one hour with a 15-20 minute question and answer session to follow. Presentation may exceed scheduled time.
* Each state and certification agency has different requirements; it is your responsibility to know what they are. Note that 1 PDH = 0.1 CEU.
* Purchase of this course allows you access to the presentation(s) for 6 months from the order date.

On-Demand Webcast
Lectures: 1
Session: 1 H 30 M
Credits: 1 PDH / 0.1 CEU

On-Demand Webcasts > Stormwater ($79.00)


Special Group Pricing Available


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