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Off with the Rule of Thumbs: Rethinking Hydrologic Impacts on Stormwater Infrastructure


Despite decades of continual use and codification of theoretical nested intensity distributions, rainfall events no longer obey these methods. And with urban catchment flooding being primarily precipitation driven, these changing patterns and volumes present engineers and politicians with new challenges.

It is no longer a matter of if an extreme event will occur, but rather when one will occur (and whether or not we will be ready). Extreme events stress local and regional infrastructure, and our response is a measure of our stewardship for the assets we manage. Therefore, the general assumptions and “rules of thumb” we have grown accustomed to need to be challenged, and our techniques and tools need to be modified to meet these newfound obstacles.

Join Forester University for this live, educational webinar as speaker Matthew Anderson, PE, CFM, reviews in detail the XPSWMM approach to hydrologic and hydraulic modeling for stormwater management. We will investigate the general movement toward calculating rainfall distributions using Atlas 14 as well as how global trends related to hydrologic response methods apply to you—saving your thumbs and making you smarter and more productive.

This course will demonstrate how stormwater standards need to evolve beyond the static singularity codified in many communities. It will teach the key lesson that, with most flooding, function of conveyance limits over time is a volumetric problem rather than being limited to just a peak conveyance issue. The root cause of flooding can be found in the application of rainfall over time, and the proper identification of when rain occurs is a crucial step toward properly identifying the impact to infrastructure.

Learning Objectives:
By participating in this webinar, attendees will:

  • Understand rainfall information
  • Learn how temporal distributions affect stormwater infrastructure
  • Leverage the latest tools to assist in quickly evaluating critical durations

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 1 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
Session: 1 H 30 M
Lectures: 1
Credits: 1.0 PDH / 0.1 CEU

On-Demand Webcast > Stormwater ($79.00)


Special Group Pricing Available


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