Webinar Archive
The Hidden Story in Your Sewers: See It with Subterra
What’s really happening inside your large-diameter sewers, and how do you see it when traditional inspection methods fall short? In this webinar, we’ll highlight real-world case studies showing how Subterra is helping utilities uncover critical insights quickly and cost-effectively. We’ll explore how utilities are using free-floating, HD 360° screening to inspect hard-to-reach assets along rivers and remote corridors, validate the long-term integrity of rehab solutions like GFRP and cured-in-place liners, assess pipelines under complex infrastructure such as airports, railroads, and major roadways, and utilize screening as a cost-effective alternative to multi-sensor inspection (MSI). Join us to see how utilities are gaining visibility of their collection system where it was previously difficult, expensive, or nearly impossible.
Sewer Sociology: What Happens in Vegas Gets Flushed in Vegas
How often do you think about the sewers beneath your feet? Wastewater professionals think about them for a living, but most people never think about them at all. However, a community and its sewers are inextricably linked, and as a result, the flow of wastewater in the sewers below provides some remarkable insights into the life of the community above, and thus the connection between sewers and sociology. This webinar provides a tour of the City of Las Vegas and its surrounding metropolitan area through the eyes of a sewer, as revealed through hydrographs of sewer flow data. This webinar is not a typical technical presentation, but rather a collection of interesting observations of human behavior documented by sewer flow monitors located throughout the Las Vegas area. An overview of sewer use patterns is provided for normal weekday and weekend periods. Variations are then discussed based on land use differences. Other distractions and disruptions that depart from normal diurnal patterns are also presented – including holidays, a power outage, concerts (including Taylor Swift), and sporting events (including Super Bowl LVIII). Practical applications include sewer design, infiltration and inflow evaluation, hydraulic modeling, and real-time alarming.
Peak Performance: Peaking Factors in Sewer Design and Evaluation
The peaking factor is a familiar concept to wastewater professionals. Various peaking factor guidelines are used to design new sewers, and these guidelines are well accepted. As such, the peaking factor can also be applied as a Key Performance Indicator (KPI) to evaluate the performance of existing sewers by comparing observed vs. expected peaking factors. Those with higher-than-expected peaking factors in wet weather indicate areas with excessive rain-dependent infiltration and inflow (RDII).
This webinar covers several popular peaking factor equations in use today and details their historical development from the early 20th Century to present. Part sewer design, part sewer history, part sewer sociology – this webinar adds a deeper layer of perspective and context to our understanding of peaking factors and their role in sewer design and evaluation.
(ACCUSONIC) Why Use Transit-Time Flowmeters for Hydro Applications?
We’ll explore the Transit-Time Principle of Operation, real-world applications, and a variety of flowmeter and transducer solutions. Discover why Transit-Time technology is ideal for hydro applications—whether you’re in Municipal Water, Hydropower, or Industrial Manufacturing. Our systems are engineered for pipes and channels of all sizes and shapes.
Introducing FlowSIGHT™
Large sewers (>36”) are inherently challenging for traditional CCTV methods of inspection due to access, significant traffic control requirements, and flow velocities. Screening Level Assessments with ADS® FlowSIGHT™ are changing the game.
PART 1: Leveraging Screening Level Assessments (SLA) to Prioritize & Justify Next Steps of Action | March 25, 2025
Leveraging rapid sewer screening methods is the focus of this webinar. We will discuss a programmatic methodology to use screenings to assist in prioritizing further diagnostic inspections, or decisions such as MSI. Our free-floating, untethered devices enable rapid visual screening of large diameter sewers. Clients who have leveraged not only this innovative methodology, but our FlowSIGHT service offering have been able to inspect portions of their collection systems that have never been inspected, while saving money by reducing operational resources needed to deploy expensive diagnostics technologies.
PART 2: Key Insights from Screening Level Assessment (SLA): Deliverables That Drive Success | May 21, 2025
Review next step actions our clients can take from the findings of a screening level assessment along with a deeper look into the specific deliverables our clients can expect from FlowSIGHT. We have several real-world examples from performing this service commercially for 5 years that demonstrate the success of this technology and methodology.
Working with Combined Sewers: Geometric and Hydraulic Elements of Egg-shaped Sewers
Do you like sewers? Do you like geometry? Do you like history? If you answered “yes” to at least two of these questions, then this webinar is for you.
Combined sewers are designed and constructed with a wide variety of sewer cross sections. While the circular section is most common, other non-circular sections have also been used over the years. Therefore, working with combined sewers requires an understanding of the geometric and hydraulic elements of these non-circular sections when encountered. The egg-shaped sewer section is the focus of this webinar. Descriptions of the most common egg-shaped sewer sections are provided, and historical perspectives regarding their development and application are discussed. The geometric and hydraulics elements of these egg-shaped sections are then defined, and the equations for the wetted area, wetted perimeter, and surface width for sewers flowing partially full are provided and validated. The result is a concise reference for wastewater professionals working with egg-shaped sewers in combined sewer systems.
Tackling Infiltration and Inflow with SLiiCER®: Series
PART 1: SLiiCER Overview – The Big Picture | August 29, 2024
This is a general overview of SLiiCER and demonstrates how it provides I/I insights to wastewater professionals. This webinar discusses the “big picture” and highlights the capabilities and time savings that SLiiCER brings to the table.
PART 2: Understanding Dry Weather Flows | September 26, 2024
Part 2 discusses techniques to extract dry weather flows from flow monitor and rainfall monitor data and how to use SLiiCER to distill them into a variety of insights including minimum, average, and maximum dry day flows, peaking factors, wastewater production, and groundwater infiltration.
PART 3: Understanding Wet Weather Flows | November 14, 2024
Part 3 discusses techniques used to evaluate rainfall dependent infiltration and inflow (RDII) and shows how to leverage SLiiCER to run the calculations, assess the results, and make any adjustments needed.