Journal article
Bedforms as Biocatalytic Filters: A Pumping and Streamline Segregation Model for Nitrate Removal in Permeable Sediments
Morvarid Azizian, Stanley B Grant, Adam J Kessler, Perran LM Cook, Megan A Rippy, Michael J Stewardson
ENVIRONMENTAL SCIENCE & TECHNOLOGY | AMER CHEMICAL SOC | Published : 2015
Abstract
Bedforms are a focal point of carbon and nitrogen cycling in streams and coastal marine ecosystems. In this paper, we develop and test a mechanistic model, the "pumping and streamline segregation" or PASS model, for nitrate removal in bedforms. The PASS model dramatically reduces computational overhead associated with modeling nitrogen transformations in bedforms and reproduces (within a factor of 2 or better) previously published measurements and models of biogeochemical reaction rates, benthic fluxes, and in-sediment nutrient and oxygen concentrations. Application of the PASS model to a diverse set of marine and freshwater environments indicates that (1) physical controls on nitrate remova..
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Awarded by U.S. National Science Foundation Partnerships for International Research and Education
Awarded by Australian Research Council Discovery Projects
Awarded by Australian Research Council
Awarded by Office Of The Director; Office Of Internatl Science &Engineering
Funding Acknowledgements
We thank A. McCluskey, E. Gee, A. Herrero, B. Celine, R. Casas-Mulet, A. Mehring, and B. Winfrey for their comments and edits on the manuscript. We gratefully acknowledge financial support from the U.S. National Science Foundation Partnerships for International Research and Education (OISE-1243543) and the Australian Research Council Discovery Projects (DP130103619 and DP1096457).