English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/27106
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Hydrodynamic characterization and performance of an autonomous benthic chamber for use in coastal systems

AuthorsFerrón, Sara; Alonso Pérez, Fernando ; Castro, Carmen G. ; Ortega, Teodora; Pérez, Fiz F. ; Ríos, Aida F. ; Gómez-Parra, Abelardo; Forja, Jesús M.
Issue Date2008
PublisherAmerican Society of Limnology and Oceanography
CitationLimnology and oceanography, methods 6: 558-571 (2008)
AbstractA benthic chamber (covering 5030 cm2 of seafloor) with real-time control of sampling and sensor data transmission has been developed for studying benthic fluxes in coastal sediments. Enclosed water is stirred by three submersible centrifugal pumps, which are connected to power circuits that regulate their input voltage, and thus, the current velocity inside the chamber. The complete mixing of the incubated water is achieved within 4 min. The 3-D velocity field and the distribution of the diffusive boundary layer (DBL) inside the chamber were characterized at different pump rates in a laboratory tank with a bottom layer of sediment or a false bottom supporting alabaster dissolution plates. Two different outlet devices from the pumps were tested. For the one finally selected, averaged tangential velocities at 5 cm above the bottom ranged from 2.0 cm s-1 to 4.8 cm s-1, depending on the voltage applied to the pumps, providing averaged DBL thicknesses that ranged from 125 µm to 279 µm. Average tangential velocity and average DBL thickness were found to correlate according to: VH = 615 × [DBL]-1.02 (R2 = 0.97). Successful field chamber measurements were performed in two shallow coastal systems: Ría de Vigo (NW Spain) and Bay of Cádiz (SW Spain).
Description14 páginas, 9 figuras, 1 tabla.
Publisher version (URL)http://www.aslo.org/lomethods/free/2008/0558.html
URIhttp://hdl.handle.net/10261/27106
ISSN1541-5856
Appears in Collections:(IIM) Artículos
Files in This Item:
File Description SizeFormat 
0558.pdf1,87 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.