Recent Developments in Runoff Reduction & International Storm Water BMP Database

Feb. 25, 2022

The 2022 SWS Webinar Series continues on February 24 at 1 p.m. CT. 

Register here | February 24 | 1 p.m. CT 

This webinar will present new developments related to runoff reduction and findings from the International Stormwater Best Management Practices Database (BMP Database). While runoff reduction through disconnecting impervious area to drain to receiving pervious areas (RPAs) has long been a recommended practice across the United States to promote infiltration and lengthen the hydrologic response time of a watershed as it develops; however, the lack of methods to quantify runoff reduction from stormwater control measures such as grass swales and buffers, has often led to these practices being overlooked.

In reality, grass buffers, swales and other RPAs (any vegetated or highly pervious areas that are wetted by runoff from impervious areas in the water quality event) are critical components of the treatment train approach to runoff, and when quantified, can play an important part in meeting regulatory requirements for runoff reduction and water quality treatment. Recent work by the Mile High Flood District (MHFD) to update stormwater quality criteria has placed an emphasis on these important runoff reduction practices and provided new methods for quantification.

In addition to highlighting the role of RPAs in runoff reduction, this presentation will also provide an update on some of the latest stormwater control measure (SCM/BMP) performance analysis from the BMP Database, with particular emphasis on nutrients and fecal indicator bacteria. The presentation will also briefly highlight some recent additions to the overall BMP Database project related to stream restoration, agricultural BMPs, and cost data.


Andrew Earles

Vice President of Water Resources; Wright Water Engineers, Inc.

Dr. Andrew Earles is the Vice President of Water Resources at Wright Water Engineers, Inc., where he has worked for over 22 years. Andrew is a Professional Hydrologist and registered Professional Engineer in multiple states. Andrew has worked with the Mile High Flood District in Denver on projects related to stormwater management and drainage criteria since the early 2000’s and has developed stormwater criteria manuals throughout Colorado and the western United States. Andrew earned his bachelor’s degree in engineering from Stanford University and master’s and doctoral degrees from the University of Virginia.

Jane Clary

Vice President and Principal Water Resources Scientist; Wright Water Engineers, Inc.

Jane Clary is a Vice President and Principal Water Resources Scientist with Wright Water Engineers in Denver, where she has focused on water quality issues, stormwater, watershed management and water conservation for 28 years. Over the past 20 years, Jane has helped develop and manage the International Stormwater Best Management Practices (BMP) Database (, which includes both conventional and green infrastructure stormwater management practices. Jane holds a B.S. in Economics from Vanderbilt University and an M.S. in Environmental Science from the University of Colorado.

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