Velocity profiling in the Chicago Sanitary and Ship Canal near the US Army Corps of Engineers Electric Dispersal Barrier near Romeoville, Illinois

On August 31, 2015, U.S. Geological Survey Illinois Water Science Center staff deployed a 2000 kHz side-looking acoustic Doppler velocity meter (ADVM) in the Chicago Sanitary and Ship Canal (CSSC) at the Electric Dispersal Barrier System (EDBS). These data were collected as a fully loaded commercial barge tow traversed the EDBS and passed the ADVM three times, and as several smaller vessels and an unloaded barge tow passed the ADVM. The ADVM was mounted to a rigid 2-inch PVC pipe in compliance with U.S. Army Corps of Engineers (USACE) operational safety protocols for working in or near the EDBS. The pipe with ADVM was lowered 4.5 feet below the water surface on the west (right) bank of the canal at a location approximately 477 feet upstream of the Romeo Road (135th Street) bridge (41.642050, -88.060383). The pipe was mounted to the walkway guard rail in a vertical orientation. An upstream and downstream guide line were used to provide additional tension to prevent movement or vibration on the PVC pipe. In this deployment configuration, the ADVM was profiling from the right wall of the canal out towards the center of the channel. ADVM data were viewed in real-time on a laptop computer during the deployment and logged simultaneously to the internal memory of the ADVM. The ADVM data were downloaded from the ADVM to a laptop computer while on site and reviewed briefly while in the field. Upon return to the USGS Illinois Water Science Center the ADVM data were downloaded from the field laptop and reviewed following standard USGS data quality assurance protocols.2015年8月31日，美国地质调查局（U.S. Geological Survey, USGS）伊利诺伊水科学中心的工作人员，在芝加哥卫生与航运运河（Chicago Sanitary and Ship Canal, CSSC）的电分散屏障系统（Electric Dispersal Barrier System, EDBS）点位部署了一台2000 kHz侧视声学多普勒流速仪（acoustic Doppler velocity meter, ADVM）。 此次采集的数据包含两类场景：其一为满载商业驳船船队三次驶过电分散屏障系统并途经该声学多普勒流速仪；其二为多艘小型船舶及一艘空载驳船船队经过该设备。 该声学多普勒流速仪安装于一根刚性2英寸聚氯乙烯（PVC）管道上，符合美国陆军工程兵团（U.S. Army Corps of Engineers, USACE）针对在电分散屏障系统内或附近开展作业的操作安全规程。 该搭载声学多普勒流速仪的管道以垂直朝向安装于步道护栏之上，被下放至运河西侧（右岸）的水面下4.5英尺处，点位距离罗密欧路（135街）桥梁上游约477英尺，坐标为41.642050, -88.060383。同时布设上游与下游导向绳以提供额外张力，防止聚氯乙烯管道发生位移或振动。 在此次部署配置中，声学多普勒流速仪的探测剖面从运河右壁向河道中心方向延伸。 部署期间，工作人员通过笔记本电脑实时查看声学多普勒流速仪数据，并将数据同步记录至设备内置存储器中。现场作业阶段，数据被从声学多普勒流速仪下载至笔记本电脑，并在野外进行初步核查。返回美国地质调查局伊利诺伊水科学中心后，工作人员再次从野外作业笔记本电脑中导出声学多普勒流速仪数据，并按照美国地质调查局标准数据质量保证规程开展复核工作。