Description
Date: July 15, 2025 | 2:00 PM EST/1:00 PM CST Speakers: Kenneth Kagy Credits: 1.0 PDH | 0.1 CEU
Join us for this live in-depth exploration of a fundamental technique used across hydrologic evaluations: assessing how rainfall runoff travels through a watershed. This webinar will focus on estimating the time of concentration—an essential factor in stormwater modeling—based on key watershed characteristics.
Attendees will examine standard methods for calculating travel time, including comparisons between Manning’s sheet flow coefficients, watershed percent impervious surface, rational method runoff coefficients, and NRCS soil curve numbers. The session will also explore how these variables influence the time of concentration and the reliability of various empirical equations when compared to traditional estimation methods.
Learning Objectives
Upon completion of this presentation, attendees should be able to:
- Improve the development of rainfall’s runoff time for the modeling hydrographs for stormwater hydrology
- Explain normalization in watershed runoff coefficients applied among other time of concentration equations
- Demonstrate additional methods to estimate rainfall runoff time with small watersheds for runoff hydrographs
About the Presenter
Kenneth Kagy, P.E., CFM, CPSWQ, CPESC Ken has worked in engineering for private consulting and local governments during the past forty years. He has made presentations on storm water management to national technical organizations, local universities, and several conferences. He has experience in site development design, site storm water management, storm water infrastructure design and construction, floodplain management, and community floodplain outreach programs. Ken is licensed as a Professional Engineer, Certified Floodplain Manager, Certified Professional in Storm Water Quality, Certified Professional in Erosion & Sediment Control, and state certified instructor for erosion control certifications.
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