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Combining numerical simulations with time-domain random walk for pathogen risk assessment in groundwater
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Water Resources Engineering.
2011 (English)In: Advances in Water Resources, ISSN 0309-1708, E-ISSN 1872-9657, Vol. 36, no SI, 98-107 p.Article in journal (Refereed) Published
Abstract [en]

We present a methodology that combines numerical simulations of groundwater flow and advective transport in heterogeneous porous media with analytical retention models for computing the infection risk probability from pathogens in aquifers. The methodology is based on the analytical results presented in [1,2] for utilising the colloid filtration theory in a time-domain random walk framework. It is shown that in uniform flow, the results from the numerical simulations of advection yield comparable results as the analytical TDRW model for generating advection segments. It is shown that spatial variability of the attachment rate may be significant, however, it appears to affect risk in a different manner depending on if the flow is uniform or radially converging. In spite of the fact that numerous issues remain open regarding pathogen transport in aquifers on the field scale, the methodology presented here may be useful for screening purposes, and may also serve as a basis for future studies that would include greater complexity.

Place, publisher, year, edition, pages
Elsevier, 2011. Vol. 36, no SI, 98-107 p.
Keyword [en]
Microbial risk assessment, Time-domain random walk
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-90220DOI: 10.1016/j.advwatres.2011.06.008ISI: 000299971900010Scopus ID: 2-s2.0-84855226431OAI: oai:DiVA.org:kth-90220DiVA: diva2:504459
Note
QC 20120305Available from: 2012-02-20 Created: 2012-02-20 Last updated: 2017-12-07Bibliographically approved

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