Torrent gushes from the Xiaolangdi Reservoir in Jiyuan, central China's Henan Province, June 21, 2011. The Yellow River Flood Control and Drought Relief Headquarters launched on Sunday a 20-day operation to discharge water from three reservoirs, namely Wanjiazhai, Sanmenxia and Xiaolangdi, in a bid to clear up the sediment in the river. [Xinhua/Miao Qiunao]