Webinars
Live Webinar Series
Infiltration and Inflow Measurement and Methods
Part 7: Gauge-Adjusted Radar Rainfall
Thursday, August 19, 2021 @ 12N EDT, 11am CDT, 10am MDT, 9am PDT
Have an infiltration and inflow (I/I) problem? You are not alone. Most wastewater collection systems do, and an I/I study is often the first place to start. Join ADS for a seven-part webinar series taught by experienced professionals where you will learn how to plan and execute successful I/I studies. The first two webinars will focus on planning, mobilization, and monitoring, while the following five webinars will discuss evaluation methods used to characterize rainfall events and understand dry weather and wet weather sewer performance. I/I studies are fundamental to the success of subsequent condition assessment and rehabilitation programs. Learn here to plan and execute them with confidence to guide and assess the programs that follow.
Duration: 50 minutes with up to 10 minutes of Q&A to follow
Gauge-adjusted radar rainfall (GARR) is a powerful tool that combines rain gauge and radar data to produce high-quality, spatially distributed rainfall data used in I/I studies and hydraulic modeling. This webinar will provide an overview of GARR and discuss how to apply it. Planning considerations will be provided, as well as practical considerations needed for successful implementation and maximum benefit.
Speaker: Baxter Vieux, Ph.D., P.E
Baxter is the Co-Founder and Chief Technology Officer of Vieux & Associates with renowned expertise in radar rainfall, distributed hydrologic modeling, and its application to wastewater collection systems. He holds a Bachelor of Science in Civil Engineering from the University of Kansas, a Master of Science in Civil Engineering from Kansas State University, and a Ph.D. in Agricultural Engineering from Michigan State University. Baxter is Professor Emeritus at the University of Oklahoma where he taught from 1990 to 2013. He is a Registered Professional Engineer in Colorado, Kansas, Ohio, Oklahoma, and Texas and is a member of the American Meteorological Society, the American Society of Civil Engineers, and the Water Environment Federation.
Infiltration and Inflow Measurement and Methods
Part 6: Wet Weather Analysis - Interpreting the Results
Thursday, July 22, 2021 @ 12N EDT, 11am CDT, 10am MDT, 9am PDT
Have an infiltration and inflow (I/I) problem? You are not alone. Most wastewater collection systems do, and an I/I study is often the first place to start. Join ADS for a seven-part webinar series taught by experienced professionals where you will learn how to plan and execute successful I/I studies. The first two webinars will focus on planning, mobilization, and monitoring, while the following five webinars will discuss evaluation methods used to characterize rainfall events and understand dry weather and wet weather sewer performance. I/I studies are fundamental to the success of subsequent condition assessment and rehabilitation programs. Learn here to plan and execute them with confidence to guide and assess the programs that follow.
Duration: 50 minutes with up to 10 minutes of Q&A to follow
The key objective of an I/I study is establishing the relationship between the rainfall and the I/I that it generates; often called the Q vs i relationship. Each basin has its own relationship that varies with Winter and Summer seasons as well as with Wet Years and Dry Years. This relationship not only is an answer in I/I studies, but it is also a Key Performance Indicator (KPI) of how the work was conducted. We will discuss how the Q vs. i plot can be used to spot storms that were affected by snowmelt, high winds, base infiltration, restricted pipes, and sanitary sewer overflows (SSOs). Rainfall measurement is mathematically just as important as flow measurement, and rainfall measurement continues to be the greatest source of error/variation of results. We will discuss Control Basins and how they can overcome the vagaries of rainfall in assessing Pre- and Post-rehabilitation success.
Speaker: Patrick Stevens, P.E.
Patrick is Vice President of Engineering at ADS Environmental Services with over 50 years of experience in wastewater engineering with a wide perspective as a municipal engineer, consulting engineering, and regulator. He holds a Bachelor of Science in Aeronautical Engineering and a Master of Science in Environmental Engineering from Purdue University. He is a 2019 Water Environment Federation Fellow.
Did You Miss Previous Webinars?
July 22, 2021
The key objective of an I/I study is establishing the relationship between the rainfall and the I/I that it generates; often called the Q vs i relationship. Each basin has its own relationship that varies with Winter and Summer seasons as well as with Wet Years and Dry Years. This relationship not only is an answer in I/I studies, but it is also a Key Performance Indicator (KPI) of how the work was conducted. We will discuss how the Q vs. i plot can be used to spot storms that were affected by snowmelt, high winds, base infiltration, restricted pipes, and sanitary sewer overflows (SSOs). Rainfall measurement is mathematically just as important as flow measurement, and rainfall measurement continues to be the greatest source of error/variation of results. We will discuss Control Basins and how they can overcome the vagaries of rainfall in assessing Pre- and Post-rehabilitation success.
June 24, 2021
The success of a rainfall-dependent inflow and infiltration (RDII) project strongly depends on project planning and execution. This webinar will define the several steps necessary to produce a useful analysis that can determine where RDII is originating and the severity of RDII throughout the study area. Key items to consider include, basin size, determining sewershed boundaries, Gross and Net RDII hydrographs and precompensation of base infiltration. We will discuss the 14 historical methods for quantifying and normalizing RDII values and recommended method(s) for normalizing RDII. Will also discuss the use of Seasons and the number of storms to be included in a study.
May 27, 2021
To understand the wet weather performance of your sewers, you first have to understand how they perform during dry weather conditions. This webinar will define a “dry day” in the context of I/I studies and show how to extract this information from study data. Key performance indicators (KPIs) include minimum, average, and maximum dry weather flow rates, as well as estimates of wastewater production and groundwater infiltration. Four methods of estimating groundwater infiltration will be discussed, including the % Minimum Method, the Wastewater Production Method, the Stevens-Schutzbach Method, and the Mitchell Method. Once KPIs are obtained, they can be used to benchmark performance against a variety of sewer design guidelines.
April 22, 2021
Following successful planning, mobilization, and monitoring, I/I can be evaluated to target the most problematic areas of the wastewater collection system for further investigation, inspection, and rehabilitation. The first step is to evaluate rainfall data obtained during the monitoring period. This webinar will discuss the definition of a rainfall event and the characteristics of rainfall events most important to I/I evaluation. Comparing rainfall events to rainfall depth-duration-frequency (DDF) and intensity-duration-frequency (IDF) data will also be discussed, along with spatial distribution methods available to extrapolate point-source rainfall measurements to areal rainfall estimates associated with the study area.March 25, 2021
Following the initial planning for an I/I study, it is time to deploy flow monitors and rainfall monitors and gather crucial data needed for successful evaluation. Part 2 of this webinar series is a panel discussion that provides important insight on what to do and what not to do in this critical phase. Panelists include ADS project managers and engineers who understand the administration, management, and technical aspects of I/I studies and have a broad range of experience on projects throughout the United States and Canada.February 25, 2021
Part 1 provides a framework to help you plan for a successful I/I study. One of the most important planning objectives is to estimate the scope, schedule, and budget for the monitoring phase, which requires that several questions be asked and answered. How many flow monitors are needed? How many rainfall monitors are needed? When should I start monitoring? How long should I monitor? We will discuss the technical implications of these questions and how they influence the success or failure of an I/I study. Applying the principles here will allow you to position your next I/I study for success.Request Access to the Webinar Archive to see all past ADS webinars at your conveniance.
Take a peek at some of the webinars in the archive. Request access to all past ADS Webinars.
SPEAKER: Kevin Enfinger, P.E.
Important engineering decisions are made every day regarding sanitary sewer, combined sewer, and storm sewer systems and often require the use of rainfall data. See how selecting the right equipment in the right quantities for your local rainfall conditions and your specific applications will lead to a successful rainfall monitoring program.
SPEAKER: Kevin Enfinger, P.E.
SLiiCER™ makes it easy to evaluate your entire collection system as a single solution, tracking down I/I to guide rehabilitation programs, eliminate overflows, and validate results.
SPEAKER: Jay Boyd
Optimize Cleaning – See how new technologies are helping municipalities reduce cleaning by up to 80%, safeguard against SSOs with 24/7 monitoring, and avoid harmful side-effects of overcleaning.