Picture taken on June 10, 2008 from a military helicopter shows flood water flowing past Beichuan County in southewest China's Sichuan Province. Drainage of the Tangjiashan quake lake through a manmade spillway speeded up to 1,760 cubic meters per second at 9:30 am on Tuesday, whereas water flow in the lower reaches of the lake, in Beichuan County, reached 2,240 cubic meters per second. [Xinhua]