Tangjiashan quake lake's influx, outflow balanced

Picture taken on June 10, 2008 from a helicopter shows flood submerge part of Beichuan County in southewest China's Sichuan Province.The influx and outflow of the lake reached a balance at the current water level, according to the Tangjiashan Lake emergency rescue headquarters on Tuesday. The lake's dam was also more secure after the water level in the lake reduced to between 720 and 721 meters at 5 p.m. (Xinhua Photo)

Picture taken on June 10, 2008 from a helicopter shows the outfall of the main quake-induced lake in Tangjiashan of southewest China's Sichuan Province. (Xinhua Photo)

Picture taken on June 10, 2008 from a helicopter shows flood submerge part of Beichuan County in southewest China's Sichuan Province. (Xinhua Photo)

Engineering soldiers prepare to board a helicopter at the dam site of Tangjiashan quake-induced Lake in southewest China's Sichuan Province, June 10, 2008. (Xinhua Photo)