Transport/fate/exposure of Manure-Borne Indicators/pathogens at Plot/field/watershed Scales
Environmental Microbial and Food Safety Laboratory
2012 Annual Report
1a.Objectives (from AD-416):
1. Incorporate the USDA-EMFSL-developed microbial simulator of transport with runoff and infiltration into watershed-scale water quality models SWAT and HSPF as an option for microbial release and possible overland fate and transport.
2. Support the construction and population of microbial database by consolidation the relevant data in formats ready for automating process of populating input files of modeling components with consistent microbial properties for appropriate environmental media.
3. Incorporate the USDA-ARS sediment-associated microbial release and settling in HSPF and SWAT microbial routing, and ensure that USDA-ARS in-stream sediment-associated microbial release and settling module is consistent with outside flow models linked to SWAT and HSPF.
4. Support the data collection and model application at the Manitiwoc River Basin as the testbed for developing integrated technology of microbial water quality assessment and forecast.
1b.Approach (from AD-416):
ARS will develop novel generic manure-borne pathogen fate and transport models at field and watershed scale. These models will be tested jointly by both ARS and the Cooperator. Data for testing will be provided by the Cooperator. ARS will provide expertise and guidance on parameter selection in model applications, and will transform model computer codes to make them compatible to decision support tools within the modeling framework used by the Cooperator. The Cooperator will evaluate models for use in regulatory practices.
The research consisted of performing several tasks. We contributed to the development of the modeling software quality assurance plan as the framework and guidance for the meeting stated objectives. This plan clearly specified the methods, procedures, considerations, assumptions, and data-sources and acceptance criteria that will be employed. Documentation on the EMFSL-STWIR model was prepared and testing results were summarized. This model will be an option in the watershed models Soil Water Assesssment Tool and Hydrological simulation Program - Fortran. Advances were made in developing a consistent dataset on microbial survival to be ported into EPA compliant microbial database. The dataset on E. coli survival in waters was mostly completed, and we began to assemble the dataset on the E. coli survival in animal waste. We participated in parameterizing STWIR-based microbial fate and transport modules with EPA data from the multiscale experiments on microbial fate and transport, and cooperated with project scientists and collaborators involved in this project on manuscript(s) for publication in peer-reviewed literature.