Bettoli, P.W., G.D. Scholten, and D.W. Hubbs. 2010. Anchoring submersible ultrasonic receivers in river channels with stable substrate. North American Journal of Fisheries Management 30:989-992.
Abstract
Abstract.—We developed an anchoring system for submersible ultrasonic receivers (SURs) that we placed on the bottom of the riverine reaches of three main-stem reservoirs in the upper Tennessee River. Each anchor consisted of steel tube (8.9 x 35.6 cm) welded vertically to a round plate of steel (5.1 x 40.6cm). All seven SURs and their 57-kg anchors were successfully deployed and retrieved three times over 547 d by a dive team employing surface air-breathing equipment and a davit equipped boat. All of the anchors and their SURs remained stationary over two consecutive winters on the hard-bottom,
thalweg sites where they were deployed. The SUR and its anchor at the most downriver site experienced flows that exceeded 2,100 m3/s and mean water column velocities of about 0.9 m/s.