Spatial distribution of depth-averaged velocity measured in the Chicago Sanitary and Ship Canal, Chicago, IL (December 7, 2010)

These data were collected using a 1200 kHz TRDI Rio Grande acoustic Doppler current profiler (ADCP) in mode 12 with 25 centimeter bins from a moving boat. The data were georeferenced with a Hemisphere Crescent A100 differential Global Positioning System (GPS) receiver with submeter accuracy. The data have been depth-averaged over the entire measured portion of the water column and temporally averaged over 5-second intervals to reduce noise. These data were collected by the U.S. Geological Survey (USGS) concurrently with environmental DNA (eDNA) sampling in this reach of the Chicago Sanitary and Ship Canal (CSSC) by the U.S. Fish and Wildlife Service (USFWS). Data were processed using the Velocity Mapping Toolbox (Parsons and others, 2013). NOTE: Any data assigned a value of "-9999" are bad or missing data 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

本数据集采用工作频率为1200 kHz的TRDI Rio Grande型声学多普勒流速剖面仪（Acoustic Doppler Current Profiler，ADCP），以12模式、25厘米的测层间距，在移动船只上完成采集。
本数据集通过带有亚米级精度的Hemisphere Crescent A100型差分全球定位系统（Global Positioning System，GPS）接收机完成地理配准。
为降低噪声，已对整个测量覆盖范围内的水柱数据进行深度平均，并以5秒为间隔开展时间平均处理。
本数据集由美国地质调查局（U.S. Geological Survey，USGS）采集，采集同期，美国鱼类及野生动物管理局（U.S. Fish and Wildlife Service，USFWS）在芝加哥卫生与船舶运河（Chicago Sanitary and Ship Canal，CSSC）该河段同步开展了环境DNA（environmental DNA，eDNA）采样工作。
数据集采用《Velocity Mapping Toolbox》（Parsons等，2013）进行处理。
注意：所有赋值为"-9999"的数据均为无效或缺失数据，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. 及Riley, J. D.（2013），Velocity Mapping Toolbox（VMT）：移动船载ADCP测量数据处理与可视化套件，《Earth Surf. Process. Landforms》，38卷：1244–1260，DOI: 10.1002/esp.3367