RUNOFF QUALITY ANALYSIS OF URBAN CATCHMENTS WITH ANALYTICAL PROBABILISTIC MODELS

Assessment of stormwater runoff pollution from urban catchments within a probabilistic framework. The methodology utilizes probability density functions of rainfall event characteristics, a runoff coefficient based rainfall-runoff transformation, and commonly used pollutant buildup and washoff processes representations. The derived models are verified with available field data from an urban catchment located in the Greater Toronto Area. The verification results suggest that these analytical probabilistic models can be used for the assessment of runoff pollutant loads from urban catchments during planning-level analyses.