Model and laboratory study of dispersion in flows with submerged vegetation
Vegetation is ubiquitous in rivers, estuaries, and wetlands, strongly influencing water conveyance and mass transport. The plant canopy affects mean and turbulent flow structure, and thus both advection and dispersion. Accurate prediction for the transport of nutrients, microbes, dissolved oxygen an...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Geophysical Union
2012
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| Online Access: | http://hdl.handle.net/1721.1/68011 |
| _version_ | 1811069025222918144 |
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| author | Murphy, E. Ghisalberti, Marco Nepf, Heidi |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Murphy, E. Ghisalberti, Marco Nepf, Heidi |
| author_sort | Murphy, E. |
| collection | MIT |
| description | Vegetation is ubiquitous in rivers, estuaries, and wetlands, strongly influencing water conveyance and mass transport. The plant canopy affects mean and turbulent flow structure, and thus both advection and dispersion. Accurate prediction for the transport of nutrients, microbes, dissolved oxygen and other scalars depends on our ability to quantify the impact of vegetation. In this paper, we focus on longitudinal dispersion, which traditionally has been modeled in vegetated channels by drawing analogy to rough boundary layers. This approach is inappropriate in many cases, as the vegetation provides a significant dead zone, which may trap scalars and augment dispersion. The dead zone process is not captured in the rough boundary model. This paper describes a new model for longitudinal dispersion in channels with submerged vegetation, and it validates the model with experimental observations. |
| first_indexed | 2024-09-23T08:04:30Z |
| format | Article |
| id | mit-1721.1/68011 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:04:30Z |
| publishDate | 2012 |
| publisher | American Geophysical Union |
| record_format | dspace |
| spelling | mit-1721.1/680112022-09-30T07:18:08Z Model and laboratory study of dispersion in flows with submerged vegetation Murphy, E. Ghisalberti, Marco Nepf, Heidi Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Nepf, Heidi Nepf, Heidi Murphy, E. Vegetation is ubiquitous in rivers, estuaries, and wetlands, strongly influencing water conveyance and mass transport. The plant canopy affects mean and turbulent flow structure, and thus both advection and dispersion. Accurate prediction for the transport of nutrients, microbes, dissolved oxygen and other scalars depends on our ability to quantify the impact of vegetation. In this paper, we focus on longitudinal dispersion, which traditionally has been modeled in vegetated channels by drawing analogy to rough boundary layers. This approach is inappropriate in many cases, as the vegetation provides a significant dead zone, which may trap scalars and augment dispersion. The dead zone process is not captured in the rough boundary model. This paper describes a new model for longitudinal dispersion in channels with submerged vegetation, and it validates the model with experimental observations. National Science Foundation (U.S.) (grant EAR-0309188) Fulbright Program (Fulbright/ Marine Institute Scholarship (2004–2005)) 2012-01-06T16:51:23Z 2012-01-06T16:51:23Z 2007-05 2007-01 Article http://purl.org/eprint/type/JournalArticle 0043-1397 W05438 http://hdl.handle.net/1721.1/68011 Murphy, E., M. Ghisalberti, and H. Nepf. “Model and laboratory study of dispersion in flows with submerged vegetation.” Water Resources Research 43.5 (2007): p. 1-12. ©2007 American Geophysical Union en_US http://dx.doi.org/10.1029/2006WR005229 Water Resources Research Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Geophysical Union Prof. Nepf |
| spellingShingle | Murphy, E. Ghisalberti, Marco Nepf, Heidi Model and laboratory study of dispersion in flows with submerged vegetation |
| title | Model and laboratory study of dispersion in flows with submerged vegetation |
| title_full | Model and laboratory study of dispersion in flows with submerged vegetation |
| title_fullStr | Model and laboratory study of dispersion in flows with submerged vegetation |
| title_full_unstemmed | Model and laboratory study of dispersion in flows with submerged vegetation |
| title_short | Model and laboratory study of dispersion in flows with submerged vegetation |
| title_sort | model and laboratory study of dispersion in flows with submerged vegetation |
| url | http://hdl.handle.net/1721.1/68011 |
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