Member $95.00 | Non-Member $145.00
Instructor Information: LaVere B. Merritt, Ph.D., P.E., BCEE, F.ASCE
Course Length: 1 Hour
This webinar was co-sponsored by ASCE's Environmental & Water Resources Institute and ASCE Continuing Education
Purpose and Background
Are you prepared to use Tractive Force (TF) methodology in new sewer design or in existing system evaluation?
Tractive force analysis and design is a “new” skill of crucial value for the wastewater collection system professional community. This approach significantly reduces the likelihood of solids buildup in sewer systems. The TF approach can also be applied to the evaluation of existing systems to locate sewers in which solids buildup is more likely. This approach results in more reliable self cleansing, accompanied by reduced nuisance problems and maintenance costs.
This webinar will focus on both understanding the tractive force approach and its application to both new sewer design and existing sewer evaluation. Development of the fundamental, yet straightforward, principles will allow webinar participants to understand and visualize the tractive force principle as applied to collection systems. Step-by-step coverage will highlight development of design minimum flowrates and steps needed to determine the minimum slope associated with the design minimum flow developed for each sewer reach.
At the conclusion, participants will be prepared to move forward in the application of tractive force to everyday design and evaluation situations whatever their role is in the wastewater collection system profession. The technical level presented will be simple enough to be understood by a non-technical professional, yet of sufficient depth to allow the hydraulic design engineer to apply the TF technique in his work.
Learning Outcomes
This webinar will teach you the underlying principles of tractive force analysis and design for gravity sanitary sewers. You will understand the principles as well as procedures to successfully apply the TF approach to both the design of new sewers and the evaluation of existing sewers.
Webinar Benefits
You will learn principles and procedures that
will put you on the cutting edge of tractive
force technology. You will be armed with tools
to help you:
- Promote its use
- Use it effectively in new sewer designs
- Use it effectively in analysis of existing sewers
- Discover the fairly simple underlying principles of tractive force methodology
- Observe the straight-forward development of the TF minimum slope equations
- See how traditional approaches differ from TF
- Understand why traditional minimum slopes are sometimes steeper and sometimes flatter than needed
- Learn why larger pipes have had more deposition problems than smaller pipes
- Comprehend why TF is superior to traditional approaches
- Learn how to establish design minimum flowrates, with emphasis on low flow zones
- Learn the steps necessary to quickly determine the design minimum slope for a sewer
- Discover what information and techniques are needed for analysis of existing sewers
- Find how TF designs can decrease sewer construction costs
Intended Audience
All sewer collection system professionals, including: collection system personnel (system managers, planning engineers, design and analysis engineers, system evaluation and maintenance engineers), educators (university and technical schools, instructors in fluid mechanics and hydraulics), consulting professionals (planners and design engineers), regulatory review agency personnel (code review-modification personnel and plan review engineers) will benefit from this webinar.
Webinar Outline
Participants will learn:
- Overview of the solids buildup problem
- Shortcomings in traditional design
- Tractive force theory
- Design flows
- Tractive force design steps
- Determination of design minimum slope
- Tools available for TF design
- Design procedures and examples
- Evaluation of existing sewers