Particle image velocimetry (PIV) data for 6 representative cases of quagga mussel filter feeding activity collected during a benthic deployment from the R/V Neeskay on Aug. 2- Aug. 9, 2017.

<p>Instantaneous flow velocity distribution on a 2D (x-z) plane, where x and z denote the horizontal and vertical directions, respectively. The velocity field was measured by an underwater PIV system deployed in Lake Michigan to investigate turbulent flows and mixing above the lake bottom, as a result of interaction between lake currents and filter feeding activities of quagga mussels.</p>

<p>Please see supporting document&nbsp;<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Bio-mixing-PIV.pdf\" target=\"_blank\">Bio-mixing-PIV.pdf</a>&nbsp;for a description of the data collection and preliminary results.&nbsp;</p>

<p>This dataset contains 6 of the 64 total image sets collected during the deployment. The 6 image sets are labeled as Cases A-F. The chosen sets represent a variety of hydrodynamic conditions. Sets A,B, and C represent the flow fields when the mussels were not actively feeding. Sets D,E, and F represent the flow fields when the mussels were actively feeding.&nbsp;</p>

<p>The datasets for each case are served with BCO-DMO&nbsp;as plain text files with fields for Case (A-F), Time (s), x coordinate (cm), z coordinate (z), u(m/s), and v (m/s). Each file is approximately 32.1 MB.&nbsp;</p>

<p>Links to the MatLab (2015b) version of these data are listed below. Each file is approximately 3.5 MB. Velocity measurements are listed in a 2D matrix format. Also listed are MatLab programs to read the data files and plot flow profiles.&nbsp;</p>

<p><a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_A.mat\" target=\"_blank\">Case A</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_B.mat\" target=\"_blank\">Case B</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_C.mat\" target=\"_blank\">Case C</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_D.mat\" target=\"_blank\">Case D</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_E.mat\" target=\"_blank\">Case E</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_F.mat\" target=\"_blank\">Case F</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/matlab_descrip.txt\" target=\"_blank\">MatLab file descriptions</a></p>

<p><a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/show_profiles.m\" target=\"_blank\">Plot profiles</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Show_velocity_field.m\" target=\"_blank\">Plot velocity fields</a><br />
<a href=\"https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/convert2CSV.m\" target=\"_blank\">Convert to CSV</a></p>

<p>本数据集包含二维（x-z）平面内的瞬时流场速度分布，其中x、z分别代表水平与竖直方向。该流场数据由部署于密歇根湖的水下粒子图像测速系统（Particle Image Velocimetry, PIV）采集所得，旨在探究湖流与斑驴贻贝滤食行为相互作用下湖底上方区域的湍流流动与混合过程。</p><p>有关数据采集流程与初步研究结果的详细说明，请参阅配套文档<a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Bio-mixing-PIV.pdf" target="_blank">Bio-mixing-PIV.pdf</a>。</p><p>本次公开数据集仅包含野外部署期间采集的64组图像中的6组，这6组图像分别标记为案例A至F。所选案例涵盖了多种水动力工况：案例A、B、C对应贻贝未主动滤食时的流场，案例D、E、F则对应贻贝主动滤食时的流场。</p><p>各案例的数据集以纯文本文件形式存储于BCO-DMO平台，文件字段包含案例编号（A-F）、时间（单位：秒）、x坐标（单位：厘米）、z坐标（z）、u方向流速（米/秒）与v方向流速（米/秒）。每个文件大小约为32.1 MB。</p><p>以下提供了该数据集适配MatLab（2015b版本）的文件链接。每个MatLab文件大小约为3.5 MB，其内部流速数据以二维矩阵格式存储，同时附带了用于读取数据文件并绘制流场剖面的MatLab程序。</p><p><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_A.mat" target="_blank">案例A</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_B.mat" target="_blank">案例B</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_C.mat" target="_blank">案例C</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_D.mat" target="_blank">案例D</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_E.mat" target="_blank">案例E</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Case_F.mat" target="_blank">案例F</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/matlab_descrip.txt" target="_blank">MatLab文件说明</a></p><p><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/show_profiles.m" target="_blank">绘制流场剖面</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/Show_velocity_field.m" target="_blank">绘制流场速度分布</a><br /><a href="https://datadocs.bco-dmo.org/docs/302/Filter_Feeders_Physics_and_Phosphorus/data_docs/729461/convert2CSV.m" target="_blank">转换为CSV格式</a></p>