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Instructor: Rod Frederick, P.E., BC.WRE, F.ASCE

Course Length: 10 Hours

Purpose and Background

Low Impact Development (LID) is an innovative approach to stormwater management that is being implemented by federal agencies, state, and local governments for aquatic resource protection and regulatory compliance. LID is a site level stormwater management design approach with an objective of maintaining the hydrologic cycle or meeting targeted watershed objectives. This is accomplished by a combination of planning and design strategies that use conservation approaches and techniques to reduce site development impacts in combination with Integrated Management Practices (IMPs). IMPs are small scale stormwater management devices that are distributed throughout the site, on buildings, and throughout the infrastructure to meet the control objectives. This includes filtering of pollutants, volume, and timing control. Common IMPs include bioretention, which is the use of the plant soil complex for stormwater management, roof gardens, permeable pavers, and amended soils.

The use of LID is being explored by transportation agencies, the Department of Defense, and many large institutions because of the potential life cycle cost savings, superior environmental protection, and ability to leverage funds from other programs, such as maintenance budgets, to construct IMPs. This approach is useful for urban redevelopment, and is being used in Combined Sewer Overflow (CSO) control programs in large cities. It is also being used in rural and smaller communities for Phase II NPDES permits because of the flexibility in construction and the ability to phase the implementation of the program.

During the last several years, seminars on LID have been conducted around the U.S. that have provided a general overview of the strategies and techniques. This two-day seminar will focus on the engineering and technical issues associated with the planning, engineering, construction, and determining the effectiveness of LID. It will give the practicing engineer a foundation to begin to design LID projects and incorporate LID into local stormwater programs. This training includes many design concepts and case studies, but does not include detailed design procedures for LID practices.

Course Outline

• Introduction/Overview of LID
• LID Hydrology
• LID Monitoring
• Bioretention / Raingardens
• Retrofit Case Studies
• Permeable Pavements
• Water Harvesting
• LID Planning and Ordinances
• LID Feasibility/Desirability Factors
• Local Site Investigation
• Green Roofs
• Land Development Case Study
• Examples of LID and Resources
• Wrap-up Questions and Answers

Seminar Benefits

• Gain an understanding of the general concepts and benefits of LID, including insight into the economic and environmental benefits of the approach
• Find out how communities are successfully implementing LID
• Gain additional tools to address WWF flow problems
• Learn alternative sustainable approaches to conventional end of pipe controls
• Obtain new perspectives on stormwater management and design
• Receive information on state-of-the-art research in modeling, monitoring, and management approaches
• Gain exposure to new LID modeling techniques and design manuals

Learning Outcomes

Upon completion of this seminar, you will be able to:

• Identify a minimum of eight concepts and strategies for using LID practices including conservation management for new and retrofit construction
• Recall a minimum of four strategies for incorporating LID into storm water management plans acceptable to permit authorities
• Describe seven of the objectives and strategies for monitoring the effectiveness of LID
• Identify the five key physical mechanisms which can contribute to positive cumulative impacts from the use of LID
• Identify a minimum of three key indicators of LID use on existing sites
• Recall four key factors that should be considered in LID selection to minimize undesirable impacts as a result of LID implementation
• Recognize a general LID selection framework for maximizing the cost effectiveness of LID
• Identify several key factors that should be considered in assessing a site for LID implementation opportunities and constraints

Assessment of Learning Outcomes

Students' achievement of the learning outcomes will be assessed via a short post-assessment (true-false, multiple choice and fill in the blank questions).

Intended Audience

Site Designers, Hydrologists, Modelers, Road Designers, Program Managers, Landscape Architects, Architects, Watershed Planners, and Environmental Groups will benefit from this seminar.

How to Earn your PDHs and Receive Your Certificate of Completion

To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.