Experiments on Large Structures - Dynamic Behavior of Concrete and Seismic Engineering - page 224

which the hydrophones were suspended. The main cable was used to connect both
banks of the reservoir, and secondary cables were placed perpendicular to the crown,
linking the dam with the main cable. This floating assembly allowed a series of
hydrophones to be suspended in several places inside the reservoir, and the
hydrodynamic pressure response at 0, 30, 60 and 90 m from the upper bank was
obtained. The distance between each transducer was 15 m, and ranged from 15 m to
75 m underwater. For the winter tests, with the ice cover as shown at the bottom of
Figure 6.18, the cable network was unnecessary and the ice was merely drilled in
several places to obtain measurements similar to those conducted in summer.
Figure 6.18. Instrumentation of the Outardes 3 dam both in summer and in winter