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Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions
Geometric mean concentrations of fecal indicator bacteria E. coli and enterococci are commonly used to evaluate the microbial quality of irrigation, recreation, and other types of waters, as well in watershed-scale microbial water quality modeling. It is not known how the uncertainty of those geomet...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6997410/ https://www.ncbi.nlm.nih.gov/pubmed/32015450 http://dx.doi.org/10.1038/s41598-020-58603-5 |
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author | Jeon, Dong Jin Pachepsky, Yakov Harriger, M. Dana Zhu, Rachael Coppock, Cary |
author_facet | Jeon, Dong Jin Pachepsky, Yakov Harriger, M. Dana Zhu, Rachael Coppock, Cary |
author_sort | Jeon, Dong Jin |
collection | PubMed |
description | Geometric mean concentrations of fecal indicator bacteria E. coli and enterococci are commonly used to evaluate the microbial quality of irrigation, recreation, and other types of waters, as well in watershed-scale microbial water quality modeling. It is not known how the uncertainty of those geometric mean concentrations depends on the time period between sampling. We analyzed data collected under baseflow conditions from three years of weekly and several daily sampling campaigns at Conococheague Creek in Pennsylvania. Standard deviations of logarithms of geometric mean concentrations were computed over weeks, months, and seasons. The increase in standard deviations from weekly to seasonal time scale was on average about 0.1 and 0.2 for log(E. coli) and log(enterococci), respectively, and in most cases was statistically significant. This may need to be accounted for when evaluating the uncertainty of measurements for modeling purposes and in risk assessment of microbial water quality. |
format | Online Article Text |
id | pubmed-6997410 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-69974102020-02-10 Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions Jeon, Dong Jin Pachepsky, Yakov Harriger, M. Dana Zhu, Rachael Coppock, Cary Sci Rep Article Geometric mean concentrations of fecal indicator bacteria E. coli and enterococci are commonly used to evaluate the microbial quality of irrigation, recreation, and other types of waters, as well in watershed-scale microbial water quality modeling. It is not known how the uncertainty of those geometric mean concentrations depends on the time period between sampling. We analyzed data collected under baseflow conditions from three years of weekly and several daily sampling campaigns at Conococheague Creek in Pennsylvania. Standard deviations of logarithms of geometric mean concentrations were computed over weeks, months, and seasons. The increase in standard deviations from weekly to seasonal time scale was on average about 0.1 and 0.2 for log(E. coli) and log(enterococci), respectively, and in most cases was statistically significant. This may need to be accounted for when evaluating the uncertainty of measurements for modeling purposes and in risk assessment of microbial water quality. Nature Publishing Group UK 2020-02-03 /pmc/articles/PMC6997410/ /pubmed/32015450 http://dx.doi.org/10.1038/s41598-020-58603-5 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Jeon, Dong Jin Pachepsky, Yakov Harriger, M. Dana Zhu, Rachael Coppock, Cary Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
title | Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
title_full | Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
title_fullStr | Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
title_full_unstemmed | Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
title_short | Effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
title_sort | effect of the time scale on the uncertainty of geometric mean concentrations of fecal indicators in creek under baseflow conditions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6997410/ https://www.ncbi.nlm.nih.gov/pubmed/32015450 http://dx.doi.org/10.1038/s41598-020-58603-5 |
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