A Systems Perspective on the Role of Green Infrastructure in Urban Watershed Hydrology and Biogeochemistry
Water@Wayne Webinar: A Systems Perspective on the Role of Green Infrastructure in Urban Watershed Hydrology and Biogeochemistry
Thursday, November 5, 2020
2:30 p.m. - 3:30 p.m.
The Water@Wayne Webinar Series presents: “A systems perspective on the role of green infrastructure in urban watershed hydrology and biogeochemistry” with Dr. Anthony Parolari, Assistant Professor in the Department of Civil, Construction, and Environmental Engineering, Marquette University.
Registration is required prior to the event.
Urbanization degrades water quality by changing watershed hydrology and biogeochemistry. To mitigate negative water quality impacts of urbanization, cities have turned to green stormwater infrastructure (GSI) and low impact development (LID) practices to promote ecosystem services provided by natural hydrology and biogeochemistry regimes. For example, the Milwaukee Metropolitan Sewerage District (MMSD) has pledged to spend $1.3B on GSI toward their Vision 2035. Understanding and control of hydro-biogeochemical dynamics is therefore a critical foundation toward building sustainable urban systems. In this talk, I will discuss several research efforts in the Milwaukee region focused on monitoring, modeling, and real-time control of GSI for runoff and water quality management.
During 2018 and 2019, we monitored soil hydrology and biogeochemistry across several urban green spaces, including a green roof, constructed wetland, detention pond, and urban farm. These measurements demonstrate strong coupling of hydrology and biogeochemistry in GSI at sub-daily to seasonal timescales, indicating that their water quality performance may be highly sensitive to variability in temperature and rainfall timing and intensity. Subsequently, we integrated these field experiments with process-based models to develop a systems-based reliability engineering framework for GSI analysis and design. The framework links hydro-climatic variability with GSI biogeochemistry to forecast a probabilistic characterization of water storage and effluent water quality.
The models have been used to develop and evaluate novel design, management, and real-time control strategies to maintain the reliability of GSI stormwater and pollutant retention in variable environments. Together, this work demonstrates the complexity of GSI performance and points toward opportunities for urban water infrastructure adaptation to climate change.