System for high-frequency simultaneous water sampling at several depths during sailing
A system allowing high-frequency sampling at several depths simultaneously have been developed. It could be used in a strong current area close to the coast with frequent 180° half-turn. It includes three main components: (i) a line able to sample at ten depths simultaneously, (ii) the Dynalest, a deep-towed depressor that maintains the line submerged at depth with a lift/drag ratio of 80, and (iii) an automatic high-frequency sampler with volume and flux control. The system was designed to collect samples for validation of 3D hydrodynamic models in the plume close to a seabed outfall with 4 m s-1 tidal currents (La Hague Cape). During sampling, the ship was operating normally at speeds of 0.5–5 m s-1 with frequent half-turns. Ten depth levels were sampled simultaneously every 30 s from 0 to 20 or 55 m depth. More than 13,000 samples were collected during a five days campaign. Vertical slices pictures of a dispersion plume where obtained each 5–10 min (100–200 measurements each one). The different parts of the system may be used separately or together. It can be adapted for varied conditions as greater depths, more vertical levels of simultaneous in-depth sampling or large volumes.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
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Supplemental Notes:
- Abstract reprinted with permission of Elsevier.
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Authors:
- Bailly du Bois, Pascal
- Pouderoux, Bertrand
- Dumas, Franck
- Publication Date: 2014-11-15
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: pp 281-289
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Serial:
- Ocean Engineering
- Volume: 91
- Issue Number: 0
- Publisher: Pergamon
- ISSN: 0029-8018
- EISSN: 1873-5258
- Serial URL: http://www.sciencedirect.com/science/journal/00298018
Subject/Index Terms
- TRT Terms: Oceanographic vessels; Plumes; Sampling; Test procedures; Testing equipment; Water quality
- Geographic Terms: Normandy (France)
- Subject Areas: Environment; Hydraulics and Hydrology; Marine Transportation; I15: Environment;
Filing Info
- Accession Number: 01545274
- Record Type: Publication
- Files: TRIS
- Created Date: Nov 26 2014 10:39AM