Stormwater Symposium

Oral

394565 - Advancing SWMM5 modeling capabilities for biofiltration with an internal water storage zone

Monday, June 4
2:00 PM - 3:30 PM
Location: Mirage Room
Co-Authors: Emma Lopez-Ponnada, Tampa, FL – University of South Florida; Mahmood Nachabe, Tampa, FL – University of South Florida; Sarina Ergas, Tampa, FL – University of South Florida

Denitrifying stormwater biofiltration systems are designed to enhance nitrogen removal and operate under saturated and unsaturated conditions; however, unsaturated drainage expressions for these systems are unavailable for use in stormwater modeling programs. Two strategies to simulate unsaturated drainage within the Stormwater Management Model Version 5.1 (SWMM5) will be presented: the LID Bioretention Module; and the main processing platform. Drainage flux simulation data from HYRDUS-1D were used to calibrate the conductivity slope (HCO), an unsaturated drainage parameter, for different media types (sand, loamy sand, and sandy loam) and nitrification layer depths (30.48-121.92 cm). The results indicate that HCO is a function of media type and depth; however, current guidance manuals only provide HCO values as a function of media type for conventional biofiltration systems. The calibrated HCO values can be directly applied within the LID Bioretention Module. The second strategy used the calibrated HCO values and Darcy’s Law to develop a novel Unified Equation that can simulate both unsaturated and saturated drainage within the main SWMM5 processing platform. Three alternative configurations are presented for this strategy. These configurations can be used in future SWMM5 studies to develop more accurate treatment expressions from pollutant removal performance data. This presentation will provide an overview of the following article which has been accepted for publication in the Journal of Sustainable Water in the Built Environment: SWMM5 unsaturated drainage models for stormwater biofiltration with an internal water storage zone.

Thomas Lynn, P.E.

Visiting Assistant Professor
Texas A&M University-Kingsville

Presentation(s):

Send Email for Thomas Lynn


Assets

394565 - Advancing SWMM5 modeling capabilities for biofiltration with an internal water storage zone



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Advancing SWMM5 modeling capabilities for biofiltration with an internal water storage zone