China warns 'high risk' of barrier lake breaching its banks

China has warned there is a "high risk" that a lake which formed after the recent landslide may breach its banks, causing a second flood downstream. As of Friday, an estimated 2.5 million cubic metres of water had accumulated at the barrier lake near the Nepal-Tibet border, according to state broadcaster CCTV. A barrier lake is a body of water formed when debris dams up a river. This barrier lake, which formed at the confluence of the Chhochen Khola and Purepu Tsangpo rivers, had start