Capturing and quantifying coarse organic matter in urban stormwater





Minnesota Pollution Control Agency [ [link removed] ]









Minnesota Stormwater Seminar Series

*Capturing and quantifying coarse organic matter in urban stormwater*

Please join us in person or online on January 18, 2024 at 10am CST for the next Minnesota Stormwater Seminar Series event - "a monthly experience featuring national, state, and local ex""perts on stormwater and green infrastructure. "This seminar series is a partnership between the University of Minnesota's St. Anthony Falls Laboratory [ [link removed] ] and Water Resources Center [ [link removed] ], and the Minnesota Pollution Control Agency [ [link removed] ], and made possible through the Minnesota Stormwater Research and Technology Transfer Program in collaboration with the Minnesota Stormwater Research Council [ [link removed] ].

*Title*: Capturing and quantifying coarse organic matter in urban stormwater [ [link removed] ]

*Speaker: *Dr. John Chapman, Associate Research Professor and Program Director, Erosion and Stormwater Management Certification Program, University of Minnesota - Bioproducts and Biosystems Engineering Department.

*Panel Discussion to Follow*

*Abstract: *How much coarse organic matter is in urban stormwater? Does it matter? Do we even know how to capture it? Large coarse organic solids or gross solids include fine and coarse sand, gravel, trash, coarse organic matter (e.g. leaves, twigs, seeds), and other solids greater than 75 μm (ASCE, 2009.). Gross solids in stormwater present many challenges including how to sample and characterize these components to accurately reflect what is in urban stormwater runoff. Gross solids could be an important source of P to these receiving waters, but their contribution to total P (TP) loads in stormwater runoff is not well understood. To better understand the contribution of gross solids to TP loads, a study was initiated in 2020 that captured and examined gross solids from 13 different urban watersheds in the Twin Cities Metro Area over a two-year period. This study explored new sampling techniques and examined modifications of existing stormwater models to determine how they could be used to estimate coarse organic loadings. Efforts also determined the nutrient content of the course organic material to help better understand the total phosphorous balance in the watershed and provide a better accounting of the phosphorus that could be reaching receiving waters from course organics. The results showed that organic material is present in urban stormwater runoff in surprisingly large amounts and contains a significant amount of phosphorus that needs to be accounted for and managed. This seminar will discuss the results of the study and feature a panel of practitioners to discuss the application of science. This project was financially supported by the Minnesota Stormwater Research Council.

*Date and Time*: Thursday, January 18, 2024, 10a - 11:30a CST

*In-person:* St. Anthony Falls Laboratory Auditorium (2 Third Ave SE, Minneapolis, MN [ [link removed] ])

*Online: *[link removed] [ [link removed] ] (active 10 minutes prior)

*Registration: *Click here to Register [ [link removed] ]






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