AWWA WQTC71645

This powerpoint presentation begins by providing a brief overview of research conducted at Ecole Polytechnique on conditions for intrusion with the goal of estimating public health risk fromintrusion events. The microbial characterization of intrusion pathways is presented, along with modeling of transient pressure events. Conclusions for intrusion pathways in distribution systems indicate that: microbial indicators of fecal contamination have been detected in soil/groundwater/flooded vaults; frequency of detection is higher for flooded vaults thanfor soil/groundwater; when microorganisms are detected, the level ofcontamination in all pathways is similar to untreatedriver water; and, more studies are needed to assess pathogenconcentrations in intrusion pathways. Conclusions for transient analysis for full-scale distribution systems indicate that: modeling transient negative pressure events inorder to estimate potential intrusion volumes (tobe ultimately used in a public health riskanalysis) is not a straightforward process; and, field pressure data are necessary to validatemodel results. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

23

File Size:

1 file , 1.1 MB