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dc.contributor.author
Bambic, Dustin G.
dc.contributor.author
Kildare Hann, Beverly J.
dc.contributor.author
Rajal, Verónica Beatriz
dc.contributor.author
Sturm, Belinda S. M.
dc.contributor.author
Minton, Chris B.
dc.contributor.author
Schriewer, Alexander
dc.contributor.author
Wuertz, Stefan
dc.date.available
2017-08-14T18:12:29Z
dc.date.issued
2015-02
dc.identifier.citation
Bambic, Dustin G.; Kildare Hann, Beverly J.; Rajal, Verónica Beatriz; Sturm, Belinda S. M.; Minton, Chris B.; et al.; Spatial and hydrologic variation of Bacteroidales, adenovirus and enterovirus in a semi-arid, wastewater effluent-impacted watershed; Elsevier; Water Research; 75; 2-2015; 83-94
dc.identifier.issn
0043-1354
dc.identifier.uri
http://hdl.handle.net/11336/22305
dc.description.abstract
Bacteroidales and viruses were contemporaneously measured during dry and wet weather conditions at a watershed-scale in a semi-arid watershed impacted by a mixture of agricultural runoff, municipal wastewater effluent and municipal runoff. The results highlight the presence of municipal wastewater effluent as a confounding factor for microbial source tracking (MST) studies, and thus data were segregated into groups based on whether they were impacted by wastewater effluent. In semi-arid environments such as the Calleguas Creek watershed, located in southern California, the relative contribution of municipal wastewater effluent is dependent on hydrology as storm events lead to conditions where agricultural and municipal stormwater dominate receiving waters (rather than municipal wastewater, which is the case during dry weather). As such, the approach to data segregation was dependent on hydrology/storm conditions. Storm events led to significant increases in ruminant- and dog-associated Bacteroidales concentrations, indicating that overland transport connects strong non-human fecal sources with surface waters. Because the dataset had a large number of non-detect samples, data handling included the Kaplan–Meir estimator and data were presented graphically in a manner that reflects the potential effect of detection limits. In surface water samples with virus detections, Escherichia coli concentrations were often below (in compliance with) the recreational water quality criteria. In fact, sites downstream of direct inputs of municipal wastewater effluent exhibited the lowest concentrations of E. coli, but the highest concentrations of human-associated Bacteroidales and highest detection rates of human viruses. The toolkit, comprised of the four Bacteroidales assays and human virus assays used, can be successfully applied to inform watershed managers seeking to comply with recreational water quality criteria. However, care should be taken when analyzing data to account for the effect of non-detect samples, sources with differing microbial viability, and diverging hydrologic conditions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Microbial Source Tracking
dc.subject
Bacteroidales
dc.subject
Quantitative Pcr
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Total Maximum Daily Load (Tmdl)
dc.subject.classification
Ingeniería Oceanográfica
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Ingeniería del Medio Ambiente
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Spatial and hydrologic variation of Bacteroidales, adenovirus and enterovirus in a semi-arid, wastewater effluent-impacted watershed
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-12-16T16:41:39Z
dc.journal.volume
75
dc.journal.pagination
83-94
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Bambic, Dustin G.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Kildare Hann, Beverly J.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Rajal, Verónica Beatriz. University of California at Davis; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Sturm, Belinda S. M.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Minton, Chris B.. Larry Walker Associates; Estados Unidos
dc.description.fil
Fil: Schriewer, Alexander. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Wuertz, Stefan. University of California at Davis; Estados Unidos. Nanyang Technological University; Singapur
dc.journal.title
Water Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.watres.2015.02.023
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0043135415000962
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