Preprints
https://doi.org/10.5194/egusphere-2024-3787
https://doi.org/10.5194/egusphere-2024-3787
12 Dec 2024
 | 12 Dec 2024
Status: this preprint has been withdrawn by the authors.

Explicit simulation of reactive microbial transport with a dual-permeability, two-site kinetic deposition formulation using the integrated surface-subsurface hydrological model HydroGeoSphere (rev. 2699)

Friederike Currle, René Therrien, and Oliver S. Schilling

Abstract. Assessing the transport behavior of microbes in surface water-groundwater systems is important to prevent contamination of drinking water resources by pathogens. While wellhead protection area (WHPA) delineation is still predominantly based on dye injection tests and advective transport modeling, size exclusion of colloid-sized microbes from the smaller and usually less conductive pore space causes a faster breakthrough and thus faster apparent transport of microbes compared to that of solutes. To provide a tool for better assessment of the differences between solute and microbial transport in surface water-groundwater systems, we here present the implementation of a dual-permeability, two-site kinetic deposition formulation for microbial transport in the integrated surface-subsurface hydrological model HydroGeoSphere (HGS). The implementation considers attachment, detachment and inactivation of microbes in both permeability regions and allows for multispecies transport. The dual-permeability, two-site kinetic deposition implementation in HGS was verified against an analytical solution for dual-permeability colloid transport and the suitability of the model for microbial transport at the wellfield scale is illustrated in a multi-tracer flow and transport study of an idealized alluvial riverbank filtration site. In this illustrative example, the transport of reactive microbes, conservative 4He, and reactive 222Rn was simulated in parallel, allowing mixing ratios, tracer breakthrough curves and travel times to be assessed via multiple approaches. The developed simulation tool is the first integrated surface-subsurface hydrological simulator for reactive solute and microbial transport, and marks an important advancement to unlock and quantify governing microbial transport processes in riverbank filtration settings. It enables meaningful WHPA delineation and risk assessments even under extreme hydrological situations such as flood events.

This preprint has been withdrawn.

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Friederike Currle, René Therrien, and Oliver S. Schilling

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CEC1: 'Comment on egusphere-2024-3787 - No compliance with the policy of the journal', Juan Antonio Añel, 27 Dec 2024
    • CC1: 'Reply on CEC1', Oliver S. Schilling, 29 Dec 2024
      • CEC2: 'Reply on CC1', Juan Antonio Añel, 31 Dec 2024
        • CC2: 'Reply on CEC2', Oliver S. Schilling, 01 Jan 2025
          • CEC3: 'Reply on CC2', Juan Antonio Añel, 02 Jan 2025
            • CC3: 'Reply on CEC3', Oliver S. Schilling, 14 Jan 2025
  • AC1: 'Comment on egusphere-2024-3787', Friederike Currle, 16 Jan 2025

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CEC1: 'Comment on egusphere-2024-3787 - No compliance with the policy of the journal', Juan Antonio Añel, 27 Dec 2024
    • CC1: 'Reply on CEC1', Oliver S. Schilling, 29 Dec 2024
      • CEC2: 'Reply on CC1', Juan Antonio Añel, 31 Dec 2024
        • CC2: 'Reply on CEC2', Oliver S. Schilling, 01 Jan 2025
          • CEC3: 'Reply on CC2', Juan Antonio Añel, 02 Jan 2025
            • CC3: 'Reply on CEC3', Oliver S. Schilling, 14 Jan 2025
  • AC1: 'Comment on egusphere-2024-3787', Friederike Currle, 16 Jan 2025
Friederike Currle, René Therrien, and Oliver S. Schilling
Friederike Currle, René Therrien, and Oliver S. Schilling

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This preprint has been withdrawn.

Short summary
We present a new approach to simulate the transport of microbes in river-aquifer systems in the integrated hydrological model HydroGeoSphere. Compared to existing models, the advantage of the new implementation lies in the consideration of all relevant parts of the water budget and the flexibility to simulate in parallel the reactive transport of several microbial species and solutes. The new developed tool enables to improve our understanding of pathogen transport in river-groundwater systems.