Seite - 1496 - in Book of Full Papers - Symposium Hydro Engineering

continued to spill from the low-level gates for more than a week after the peak flow occurred. The outflow hydrograph for the event in shown in Fig. 5, while observations of the spill event are shown in Fig. 6. Fig. 5 Outflow hydrograph from March 2016 spill event. Fig. 6 Discharge on March 6, 8 am (125 m3/s (left), March 12, 10 am (30 m3/s) (right). Analysis of displacement data recorded for Block 2 indicated the block was eroded from its mold at approximately 3 am on March 6 during the rising limb of the outflow hydrograph at a discharge of 109 m3/s (Fig. 5). After the initial wetting of the block by spillway flows, displacements occurred gradually (at the sub- millimeter scale) until the block was removed (Fig. 7). Prior to removal, the total magnitude of uplift was relatively minor (less than 3 mm) during the approximately 9 hr period when the block was submerged. Some anomalous spikes are observed in the displacement magnitude data, however, review of individual data from each of the displacement sensors suggests that these spikes are erroneous and 1496