evidence: The recent shifts in the course of the Semliki are being attributed to the melting of glaciers on the Rwenzori. [...] But with its volume and course determined by the amount of runoff from the Rwenzori Mountains, the melting of glaciers as a result of higher temperatures has seen the river vary course in recent times. [...] Uganda and the DRC have previously clashed over the small island of Rukwanzi in Lake Albert.