AWWA WQTC60722

A mathematical model was developed to quantify Cryptosporidium, Giardiaand E. coli loads in the Wingecarribee watershed, which is part of the drinking water watershedserving approximately 4 million residents in Sydney, Australia. The model describes the relativesignificance of different sources of the pathogens as well as their fate and transport as they movethrough the sub-watersheds. The estimation of pathogen transport rates from fecal deposits towaterways via surface runoff was identified as an important component of the model. Experimentswere conducted using artificial rainfall simulation to determine the rate of Cryptosporidium, E. coliand PRD1 bacteriophage transport from bovine fecal pats. Future work will focus on testing themodel to calibrate those components with the highest level of uncertainty, including rates of directfecal deposition, connectivity of on-site systems and rates of manure mobilization for other types ofanimals. The pathogen model will enable water utility managers to identify those watershedsegments that contribute the highest load of pathogens and where management options will be mosteffective. Includes 15 references, table, figures.

Product Details

Edition:

Vol. - No.

Published:

11/15/2004

Number of Pages:

8

File Size:

1 file , 360 KB