Simulation of herbicide concentrations in stormflow from forested watersheds. Nutter, W. L. Water Resource Bulletin, 1984.
Simulation of herbicide concentrations in stormflow from forested watersheds. [pdf]Paper  abstract   bibtex   
The breakpoint rainfall hydrology and pesticide options of the field scale model CREAMS were used to predict average concentrations of hexazinone in stormflow from four forested watersheds in the upper Piedmont of Georgia. Predicted concentrations were compared with measured concentrations recorded over a 13-month period. CREAMS accurately predicted hexazinone highest concentrations. The model underestimated the hexazinone concentrations in stormflow after two months following pesticide application. In a companion study, the daily rainfall option of the CREAMS model was used to evaluate the relative risk associated with the maximum expected concentration of several herbicides in stormflow from small forested watersheds. The model predicted the following order of potential residue appearance in stormflow: bromacil \textgreater triclopyr \textgreater hexazinone \textgreater picloram \textgreater dicamba. Subsurface movement of residues via interflow and deep leaching losses are not simulated by the version of CREAMS used in these studies.

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