The stormwater manhole sump. A simple concept, where you extend the manhole below the outlet pipe to create a sedimentation pool. Manhole sumps have been installed for decades, but what can we learn if we look closely at what gets collected? Using historical data and modeling software originally developed to look at hydrodynamic separators we have gained insight to the stormwater sediment concentrations and particle distributions. In the process, we have also learned some lessons on clean out frequency. This presentation will feature the results a recently completed research project.
John Chapman is an Assistant Research Professor for the University of Minnesota Department of Bioproducts and Biosystems Engineering and also serves as the Director of the Erosion and Stormwater Management Certification Program. John holds a Ph.D. in Civil Engineering and is a registered engineer in Minnesota and Colorado. When not researching erosion control and stormwater, he conducts workshops for engineers, contractors and other professionals on stormwater management technology and regulations.