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.