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Scaling considerations and sampling strategies in monitoring aquatic ecohydrodynamics
Papadimitrakis, Y.; Nihoul, J.C.J. (1997). Scaling considerations and sampling strategies in monitoring aquatic ecohydrodynamics, in: Stel, J.H. et al. (Ed.) Operational oceanography: the challenge for European co-operation: Proceedings of the First International Conference on EuroGOOS 7-11 October 1996, The Hague, The Netherlands. Elsevier Oceanography Series, 62: pp. 558-567
In: Stel, J.H. et al. (Ed.) (1997). Operational oceanography: the challenge for European co-operation: Proceedings of the First International Conference on EuroGOOS 7-11 October 1996, The Hague, The Netherlands. Elsevier Oceanography Series, 62. Elsevier Science: Amsterdam. ISBN 0-444-82892-3. XX, 757 pp., more
In: Elsevier Oceanography Series. Elsevier: Oxford; New york; Amsterdam. ISSN 0422-9894, more

Available in  Authors 
  • VLIZ: Open Repository 97105 [ OMA ]
  • VLIZ: Proceedings E [97104]
Document type: Conference paper

Keywords
    Aquatic environment; Hydrodynamics; Mixing processes; Monitoring systems; Marine

Authors  Top 
  • Papadimitrakis, Y.
  • Nihoul, J.C.J., more

Abstract
    The basic time (and length) scales governing the physical transport and mixing processes in aquatic environments are briefly reviewed in an ecohydrodynamic perspective. Such time scales are: the molecular diffusion time, Td, the falling particle time, Tf, the mixing time, Tm, the advection time, Ta, and the Kolmogorov (or viscous) time, Tk. For large water bodies, two more time scales can be formulated based on the Coriolis frequency, fc, and the Kibel frequency, fk. These time scales form several spectral windows, which correspond to the scales of external forcing or of intrinsic mechanisms, determine the hydrodynamic processes that may significantly interact with the various populations of the aquatic communities and govern the dynamics of the aquatic system. Motions at the time scales of the weather of the aquatic environment are resonant with the ecosystem dynamics and impose to the ecosystem certain length scales through the process of ecohydrodynamic adjustment. Knowledge of such characteristic time scales facilitates the selection of appropriate strategies for sampling environmental quantities and satisfying the frequency sampling requirements.

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