Thermal Evaluation of Upland Stormwater BMPs: Impact of Design Modifications to Buffer Stream Temperatures in Urbanized Watersheds

Loading Events

Thermal Evaluation of Upland Stormwater BMPs: Impact of Design Modifications to Buffer Stream Temperatures in Urbanized Watersheds

Thermal pollution from urbanization and ponding of water in stormwater management facilities is a known detriment to the biological functionality of streams. Section 502(6) of the Clean Water Act considers heat as a pollutant, and temperature continues to be a focus of the category 5 listings within MDE’s integrated report. Currently, typical stormwater retrofit designs address nutrient and sediment inputs, but do not necessarily include design elements that address thermal impacts, which likely increase stream temperatures during warmer months. Carroll County consists primarily of Use III and IV streams, and to generate a better understanding of what capacity specific BMPs have on reducing thermal impacts to the receiving waters, studies were initiated that looked at the efficacy of these practices at reducing thermal impacts to our waterways. Long-term monitoring was set up at a large sand filter BMP to understand how dry facilities buffered stormwater temperatures from pavement to tailwater. Additionally, an ongoing paired BMP study is comparing a traditional bottom release wet pond with one that incorporated a “gravel lens” around the dewatering pipe. Ideally, the “gravel lens” will provide better temperature buffering, reducing the thermal impact to receiving waterways than that of traditional bottom release wet ponds.
 

Speaker Bio:

 

Byron Madigan

Byron Madigan has been with Carroll County for the past 16 years and is the Supervisor for the Water Resources Division within the County’s Bureau of Resource Management. In this role, he oversees the groundwater, surface water, Army Corps and MS4 monitoring programs and requirements for the County. Additionally, Byron serves as a Board of Director for Maryland’s Water Monitoring Council and recently assumed the role as chairman for the Board’s Monitoring and Assessment Subcommittee.

Upcoming Events

Advancing Sustainable Stormwater Management in the Chesapeake Bay Region: Use of Innovative Biochar Technology for High Performance, Climate-Friendly Green Infrastructure

Advancing Sustainable Stormwater Management in the Chesapeake Bay Region: Use of Innovative Biochar Technology for...

12:00 PM - 01:00 PM
This presentation will overview the advanced use of biochar technology for sustainable stormwater management within the Chesapeake Bay Region. Biochar, a carbonaceous material synthesized...
Read More
The Threat of Climate Change to Urban Stormwater Infrastructure

The Threat of Climate Change to Urban Stormwater Infrastructure

12:00 PM - 01:00 PM
Extreme events throughout the USA and the world have become mainstream news, causing tens and hundreds of millions of dollars in damage, not to...
Read More
Thermal Evaluation of Upland  Stormwater BMPs: Impact of Design Modifications to Buffer Stream  Temperatures in Urbanized Watersheds

Thermal Evaluation of Upland Stormwater BMPs: Impact of Design Modifications to Buffer Stream Temperatures in...

12:00 PM - 01:00 PM
Thermal pollution from urbanization and ponding of water in stormwater management facilities is a known detriment to the biological functionality of streams. Section 502(6)...
Read More