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Instructor:  Mark Peterson, P.E.

Course Length: 1.5 Hours

Parking lot drainage designs are often left to the end of the design process or completed by an inexperienced engineer because it is viewed as a simple task. While the basic calculations can be relatively straightforward, many issues must be considered during the design of the parking lot. This webinar will cover many of those design considerations and also cover basics of the technical aspects of drainage design for a parking lot. The webinar will also discuss some of the Low Impact Development (LID) techniques that are appropriate for parking lots.

Purpose and Background

There are a number of concepts to be considered in the design of drainage for a parking lot. These concepts include site grading, minimum slopes, conveyance of storm water, and locations of detention ponds. Each of these concepts will be discussed to provide some general guidance for good design. Several approaches to calculations for pre-development and post-development peak flows will also be discussed. Detention ponds are frequently required to reduce the impacts of the development by reducing the post-development peak flow to pre-development levels. The basic concepts of detention pond design will be covered. Parking lots often present an excellent opportunity to incorporate Low Impact Development (LID) features, but these features need to be designed appropriately. The general use of LID features in parking lots will also be covered.

Primary Discussion Topics

• General drainage design, including minimum slopes and impacts of islands
• Basics of calculating pre-development and post-development runoff
• Inlet locations and capacity
• Basics of detention pond sizing
• Incorporating LID techniques into parking lot design

Learning Outcomes

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

• Determine the basic considerations for design of drainage for parking lots
• Become familiar with some of the common approaches to runoff calculations
• Explore the basic parameters required to design a detention pond for a parking lot
• See how to incorporate some LID features into the drainage design for a parking lot

Webinar Benefits

• Find out how to avoid some of the common mistakes in parking lot drainage design
• Learn some of the common practices in calculating pre-development and post-development runoff
• Understand what parameters impact the sizing of a detention pond
• Learn how Low Impact Development (LID) features can be incorporated into parking lots

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

• Design engineers/planners
• Building architects
• Government officials
• Webinar Outline
• General drainage considerations for parking lots
• Calculating peak flows
• Sizing detention ponds
• Using LID features in parking lots

How to Earn your CEUs/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.

How do I convert CEUs to PDHs?

1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]