Urban Runoff Pollution Method

This work devises a simplified method to evaluate the event magnitude of nonpoint source rain-induced UBOD loads for urban areas. The method is flexible, non-dependent upon computer simulation, and uses readily available data. The results appear to be realistic. Ten urban watersheds were studied using a methodology that assumes triangular hydrographs and piece-wise linear pollutographs. A rapid method for estimating pollutant loadings in terms of pounds per acre per storm is presented. UBOD was used in this study but the methodology is readily adaptable to other parameters. The effects of storage and streetsweeping on total storm loadings are preliminarily evaluated.