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Transport of copiotrophic bacteria in oligotrophic coarse soils: a Monte Carlo analysis

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dc.contributor.authorPeterson, Thomas Charles, author
dc.contributor.authorWard, Robert C., advisor
dc.contributor.authorWarner, James W., committee member
dc.contributor.authorHunt, H. William, committee member
dc.contributor.authorDoxtader, Kenneth G., committee member
dc.date.accessioned2021-09-23T21:30:12Z
dc.date.available2021-09-23T21:30:12Z
dc.date.issued1987
dc.description.abstractOn-site wastewater treatment systems placed in coarse-grained, oligotrophic soils such as those typically found in the mountainous regions of the West are designed and installed with the assumption that most pathogenic microorganisms will not pass unaltered through an unsaturated zone located in the soil below each system. Studies have shown that 0.6 to 1.2 m of unsaturated soil below an on-site system drainfield is sufficient to remove most bacteria and viruses in most environments. Little is known of the transport of pathogenic, copiotrophic bacteria in coarse-grained soils below on-site drainfields placed in mountainous soil environments thought to be oligotrophic. A stochastic bacterial transport model was developed to analyze bacterial translocation in coarse-grained, mountainous soils beneath a hypothetical drainfield/soil interface. Specific model parameters were randomly generated using a procedure known to produce either a normal or log-normal distribution of random numbers. Numerous computer simulation runs were completed for hypothetical sandy and loamy sand soils subjected to a 10 year and 100 year rain storm. The resulting output was used to generate cumulative frequency distributions. Results from these simulations indicate that copiotrophic, enteric bacteria have the potential to travel great distances in oligotrophic, coarse-grained soils. The copiotrophic bacteria are likely to travel beyond the arbitrary 1.2 m of soil under conditions typically occurring in mountainous regions. The extent of bacterial transport and the bacterial concentration at any point in the soil is largely the result of the initial bacterial concentration, the impact of straining and clogging by the soil, and the bacterial die-off.
dc.format.mediumdoctoral dissertations
dc.identifier.urihttps://hdl.handle.net/10217/233933
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991010249059703361
dc.relationQR111.P48 1987
dc.relation.ispartof1980-1999
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subject.lcshSoil microbiology
dc.subject.lcshSoil pollution
dc.subject.lcshPathogenic bacteria
dc.titleTransport of copiotrophic bacteria in oligotrophic coarse soils: a Monte Carlo analysis
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineAgricultural and Chemical Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D)

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