Storm loads of culturable and molecular fecal indicators in an inland urban stream.

摘要: Elevated concentrations of fecal indicator bacteria in receiving waters during wet-weather flows are a considerable public health concern that is likely to be exacerbated by future climate change and urbanization. Knowledge factors driving the fate transport stormwater limited, even less known about molecular indicators, which may eventually supplant traditional culturable indicators. In this study, loading rates both indicators were quantified throughout six storm events an instrumented inland urban stream. While each increased rapidly rising limb hydrographs, it rather than instantaneous provide better estimate through stream entire storm. Concentrations general (both molecular) correlated most highly with other but not human-associated HF183 Bacteroides marker. Event loads strongly total runoff volume, maximum discharge, turbidity, while event time peak flow hydrograph. These observations suggest collection multiple samples critical for accurate predictions flows, required effective watershed management. addition, existing predictive models based on sufficient predict source-specific genetic markers contamination.