evidence: River Semliki has changed course several times since 1960 as rising water volumes sparked by melting mountain snow caps cause meandering and alteration of the boundary. [...] Run-off from the ice caps on the Rwenzori mountains is one of the Semliki's major tributaries, but as temperatures have risen in recent years, water has rushed down the mountain with increasingly high volume causing erosion on the river banks and redirection of its course, Kitutu said. "Our research shows that the river has widened by an average of 10 meters." The implications of the Semliki's changing course are more than just environmental.