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Title: Multiscale framework for modeling multicomponent reactive transport in stream corridors

Abstract

Here, travel time–based representations of transport, a highly successful strategy for modeling conservative tracer transport in stream corridors, are extended to accommodate multicomponent reactive transport. Specifically, convolution representations used to model exchange of solute with the hyporheic zone are shown to be equivalent to solving one–dimensional subgrid models in Lagrangian form coupled to the advection dispersion equation for the stream channel. Unlike the convolution–based representations of previous travel time–based stream transport models, the subgrid model generalizes to include multicomponent reactive transport with general nonlinear reactions. An example involving biomass growth, the establishment of redox zonation, and the resulting impact on denitrification rates demonstrate reach–scale application of the new approach. Although simplified, those example simulations show some of the key phenomena associated with hyporheic–zone denitrification that are not represented with conventional first–order estimates.

Authors:
ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1474870
Alternate Identifier(s):
OSTI ID: 1476374
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Water Resources Research
Additional Journal Information:
Journal Name: Water Resources Research; Journal ID: ISSN 0043-1397
Publisher:
American Geophysical Union (AGU)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; reactive transport; streams; hyporheic zone; multi scale

Citation Formats

Painter, Scott L. Multiscale framework for modeling multicomponent reactive transport in stream corridors. United States: N. p., 2018. Web. doi:10.1029/2018WR022831.
Painter, Scott L. Multiscale framework for modeling multicomponent reactive transport in stream corridors. United States. doi:10.1029/2018WR022831.
Painter, Scott L. Wed . "Multiscale framework for modeling multicomponent reactive transport in stream corridors". United States. doi:10.1029/2018WR022831. https://www.osti.gov/servlets/purl/1474870.
@article{osti_1474870,
title = {Multiscale framework for modeling multicomponent reactive transport in stream corridors},
author = {Painter, Scott L.},
abstractNote = {Here, travel time–based representations of transport, a highly successful strategy for modeling conservative tracer transport in stream corridors, are extended to accommodate multicomponent reactive transport. Specifically, convolution representations used to model exchange of solute with the hyporheic zone are shown to be equivalent to solving one–dimensional subgrid models in Lagrangian form coupled to the advection dispersion equation for the stream channel. Unlike the convolution–based representations of previous travel time–based stream transport models, the subgrid model generalizes to include multicomponent reactive transport with general nonlinear reactions. An example involving biomass growth, the establishment of redox zonation, and the resulting impact on denitrification rates demonstrate reach–scale application of the new approach. Although simplified, those example simulations show some of the key phenomena associated with hyporheic–zone denitrification that are not represented with conventional first–order estimates.},
doi = {10.1029/2018WR022831},
journal = {Water Resources Research},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
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