The rock mass lift phenomenon appears in the reservoir dam area after the water storage of Fiangya reservoir.

江垭水库蓄水后，水库坝区岩体出现了的抬升变形现象。

youdao

For the arch dam which reservoir has no suitable breach to build lasher and has mass flood discharge, opening large orifice for flood discharge has great advantage.

对于库区无适宜垭口可兴建泄洪道，而泄洪量又较大的拱坝工程，在坝身中开设大孔口泄洪具有显著的优越性。

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This report quoted Russian Investigative Committee spokesman Vladimir Markin as saying "there were no mass water releases or overflow over the dam" from the Neberdzhayevskoye Reservoir.

CNN: July 9, 2012 -- Updated 0150 GMT (0950 HKT)