Influence of precipitation and soil on transport of fecal enterococci in fractured limestone aquifers.

摘要: Limestone aquifers provide the main drinking water resources of southern Italy. The groundwater is often contaminated by fecal bacteria because interaction between rocks having high permeability and microbial pollutants introduced into environment grazing and/or manure spreading. contamination springwater in picnic areas located mountains can cause gastrointestinal illness. This study was carried out order to analyze Enterococcus faecalis soil a limestone aquifer verify influence this on time dependence contamination. E. chosen because, area involved, it represents better indicator than Escherichia coli. research through field (springwater monitoring) laboratory experiments (column tests with intact blocks). transport bacterial cells samples analyzed simulating an infiltration event that monitored area. Comparison results data acquired showed discontinuous precipitation caused intermittent migration microorganisms produced, together dispersion fractured medium (unsaturated saturated zones), articulated breakthrough at spring. short distances produced significant daily variability scale.