Spatial distribution of layer-averaged velocity measured in the Calumet Harbor, Illinois (September 14, 2015)

Acoustic Doppler current profiler (ADCP) data were collected at multiple transects spaced in a regular grid throughout Calumet Harbor on September 14, 2015 to determine the spatial distribution of layer-averaged velocities. The data were layer-averaged in 2-foot increments of depth from the bed to the water surface, and temporally-averaged over a 30-second window to reduce noise. Data were processed using the Velocity Mapping Toolbox (Parsons and other, 2013). Any data assigned a value of "-9999" are invalid or missing and should not be used for analysis. Parsons, D. R., Jackson, P. R., Czuba, J. A., Engel, F. L., Rhoads, B. L., Oberg, K. A., Best, J. L., Mueller, D. S., Johnson, K. K. and Riley, J. D. (2013), Velocity Mapping Toolbox (VMT): a processing and visualization suite for moving-vessel ADCP measurements. Earth Surf. Process. Landforms, 38: 1244–1260. doi: 10.1002/esp.3367

2015年9月14日，研究团队于卡卢梅特港（Calumet Harbor）全域内以规则网格布设的多条断面采集声学多普勒流速剖面仪（Acoustic Doppler Current Profiler, ADCP）数据，以解析层平均流速的空间分布特征。该数据以从河床床面至水面的2英尺深度增量进行分层平均处理，并通过30秒时长的窗口实施时间平均以降低噪声。数据采用流速映射工具箱（Velocity Mapping Toolbox, VMT；Parsons等，2013）完成处理。所有赋值为"-9999"的数据均为无效或缺失值，不得用于分析。Parsons, D. R.、Jackson, P. R.、Czuba, J. A.、Engel, F. L.、Rhoads, B. L.、Oberg, K. A.、Best, J. L.、Mueller, D. S.、Johnson, K. K. 与 Riley, J. D.（2013）：《流速映射工具箱（VMT）：移动船载ADCP测量的处理与可视化套件》，《地球表面过程与地貌》，38卷：1244–1260。doi: 10.1002/esp.3367