Conference Agenda

Biocides are commonly used in facade coating materials; however, their release into stormwater runoff endangers both aquatic and terrestrial ecosystems. Despite the rising need to tackle this problem, urban-scale modeling of biocide emissions remains underexplored due to the complexity of biocide behavior, variability in emissions, and limited knowledge on biocide stocks. The main objective of this research is to couple a biocide emission model with the Town Energy Balance(TEB) model, a distributed hydroclimatic model, to simulate urban-scale emissions and their contributions to stormwater systems. This paper develops and evaluates a methodological framework for distributed modeling of biocide emissions from buildings’ façades at an urban scale. The developed model calculates the quantity of biocides released from building facades by wind-driven rain(WDR) at an hourly timestep. The application of the developed model is done on 2 residential areas. A single-mesh analysis using Monte Carlo simulations is performed to examine the parameters impact on total emissions. Then, a multi-mesh analysis is used, where meshes are incrementally added until the average emission per mesh stabilizes. This work determines the applicability of the model and the appropriate spatial scale for urban modeling of biocide runoff, hence providing reliable emission estimates at the urban scale.