Hydrometeorological and physicochemical drivers of fecal indicator bacteria in urban stream bottom sediments.

摘要: High levels of fecal indicator bacteria (FIB) are the leading cause surface water quality impairments in United States. Watershed-scale models commonly used to identify relative contributions watershed sources and evaluate effectiveness remediation strategies. However, most existing simplify FIB transport behavior as equivalent that dissolved-phase contaminants, ignoring impacts sediment on fate FIB. Implementation sediment-related processes within is limited by minimal available monitoring data concentrations for model development, calibration, validation purposes. The purpose present study streambed sediments compared those column environmental variables influence underlying levels. Concentrations Escherichia coli enterococci an urban stream were monitored weekly 1 yr correlated with a variety potential hydrometeorological physicochemical variables. Increased both strongly increased antecedent 24-h rainfall, temperature, decreased dissolved oxygen, specific conductivity. These observations will support future efforts incorporate through identification key relationships other inputs, provision direct calibration. In addition, identified can be quick evaluation