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System for high-frequency simultaneous water sampling at several depths during sailing

机译：航行期间在多个深度进行高频同时水采样的系统

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摘要

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.
机译：已经开发了允许同时在几个深度进行高频采样的系统。它可以在靠近海岸的强电流区域中频繁使用180度半转。它包括三个主要组成部分：（ⅰ）能够同时在十个深度采样的管线；（ⅱ）Dynalest，一种深拖式降压器，可将管线浸入深度为80的升/降比；以及（ⅲ）具有音量和流量控制的自动高频采样器。该系统旨在收集样本，以验证在潮汐流为4 m s〜（-1）的海床出口附近的羽流中的3D流体动力学模型（La Hague Cape）。在采样过程中，该船以0.5-5 m s〜（-1）的速度正常运转，并有频繁的半转弯。每30秒从0到20或55 m深度同时采样十个深度级别。为期五天的活动收集了超过13,000个样本。垂直切片的弥散羽流图片，每5-10分钟获得一次（每次100-200次测量）。系统的不同部分可以单独使用或一起使用。它可以适应各种条件，例如更大的深度，更多的垂直水平同时进行深度采样或大体积。

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  • 来源
    《Ocean Engineering》 |2014年第15期|281-289|共9页
  • 作者

    Pascal Bailly du Bois; Bertrand Pouderoux; Franck Dumas;

  • 作者单位

    IRSN/DEI/SECRE/LRC, Institut de Radioprotection et de Suerete Nucleaire, Direction de l'Enviromement et de l'Intervention, Laboratoire de Radioecologie de Cherbourg-Octeville, rue Max Pol Fouchet, B.P. 10, 50130 Octeville, France;

    Universite de Caen, ESIX Normandie, Departement CSI, Rue Louis Aragon, B.P. 78, 50100 Cherbourg-Octeville, France;

    IFREMER/DYNECO/PHYSED, centre de Brest, Z.I. de la pointe du Diable, B.P. 70, 29280 Plouzane, France;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Oceanographic instrumentation; Automatic sampler; Depth; Depressor; Modelling; Dispersion;

    机译：海洋学仪器;自动进样器;深度;降压器造型;分散;

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