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The main objective of this study was to generate measurableinput functions to models for predicting the fate and transport of surface water pathogens inwatersheds, thereby enabling better management of factors that govern the transport ofpathogens to surface waters.A systematic approach was implemented for identifying the industry's research prioritiesrelating to pathogen fate and transport in watersheds. A conceptual model of the relevantprocesses was developed and the literature describing those processes was critically peerreviewed (Ferguson et al., 2003). Knowledge gaps were identified and considered within thecontext of the conceptual model. A combination of the magnitude of the knowledge gaps, thebenefits of having them narrowed and the resource requirements for doing so provided thebasis for setting the research priorities. As a result of this review, the research carried outfocused on achieving the following specific objectives:to quantify watershed pathogen sources so as to serve as measurable inputfunctions to models for predicting downstream concentrations;to describe pathogen attenuation as a function of organism characteristicsand watershed-specific features (soil type, aggregation and dispersal);to identify and quantify the principal factors affecting pathogen viability infeces and soil, as they transit to local surface water; and,to quantify the influence of the principal factors affecting transport of mobilepathogens passing across the terrestrial environment to local surface water.Pathogen sources and viability, dispersion of Cryptosporidium oocysts, mobility of viruses, and plot studies and rainfall simulation are discussed. Includes 9 references, table, figures.

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Edition: Vol. - No. Published: 11/15/2004 Number of Pages: 6File Size: 1 file , 310 KB